Clean Energy Fuels Corp. (CLNE) CEO Andrew Littlefair On Q4 2018 Results - Earnings Call Transcript

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About: Clean Energy Fuels Corp. (CLNE)
by: SA Transcripts
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Earning Call Audio

Clean Energy Fuels Corp. (NASDAQ:CLNE) Q4 2018 Results Conference Call March 12, 2019 4:30 PM ET

Company Participants

Andrew Littlefair - President and CEO

Robert Vreeland - CFO

Conference Call Participants

Rob Brown - Lake Street Capital Markets

Eric Stine - Craig-Hallum

Pavel Molchanov - Raymond James

Operator

Greetings. Welcome to Clean Energy Fuels Fourth Quarter 2018 Earnings Conference Call. At this time, all participants are in listen-only mode. A question-and-answer session will follow the formal presentation. [Operator Instructions] Please note that this conference is being recorded.

I’ll now turn the conference over to Robert Vreeland. Mr. Vreeland, you may begin.

Robert Vreeland

Thank you, operator.

Earlier this afternoon, Clean Energy released financial results for the quarter and year ending December 31, 2018. If you did not receive the release, it is available on the Investor Relations section of the Company’s website at www.cleanenergyfuels.com where the call is also being webcast. There will be a replay available on the website for 30 days.

Before we begin, we’d like to remind you that some of the information contained in the news release and on this conference call contains forward-looking statements that involve risks, uncertainties and assumptions that are difficult to predict. Words of expression reflecting optimism, satisfaction with current prospects as well as words such as believe, intend, expect, plan, should, anticipate and similar variations identify forward-looking statements, but their absence does not mean that the statement is not forward-looking.

Such forward-looking statements are not a guarantee of performance and the Company's actual results could differ materially from those contained in such statements. Several factors that could cause or contribute to such differences are described in detail in the Risk Factors section of the Clean Energy’s Form 10-K filed today. These forward-looking statements speak only as the date of this release. The Company undertakes no obligation to publicly update any forward-looking statements or supply new information regarding the circumstances after the date of this release.

The Company’s non-GAAP EPS and adjusted EBITDA will be reviewed on this call and exclude certain expenses that Company's management does not believe are indicative of the Company's core business operating results. Non-GAAP financial measures should be considered in addition to results prepared in accordance with GAAP and should not be considered as a substitute for or superior to GAAP results. The directly comparable GAAP information, reasons why management uses non-GAAP information, a definition of non-GAAP EPS and adjusted EBITDA and a reconciliation between these non-GAAP and GAAP figures is provided in the Company's press release, which has been furnished to the SEC on Form 8-K today.

With that, I will turn the call over to our President and Chief Executive Officer, Andrew Littlefair.

Andrew Littlefair

Thank you, Bob. Good afternoon, everyone, and thank you for joining us.

I’m pleased to report that with the close of 2018, results of multiple strategic operational and financial initiatives that we put in place, have begun to pay off with positive results. We believe this momentum will continue through 2019, and I will explain why.

In the fourth quarter of 2018, we delivered 98.7 million gallons, a 14% increase over the 86.4 million in the same quarter in 2017. And we believe this trend will continue into 2019. For the entire year, we delivered 365 million gallons, a 4% increase over 2017. Our revenues were $96 million in the fourth quarter versus $89 million in the fourth quarter of 2017. Our fuel volume revenue in the fourth quarter increased 21% to $78 million versus $65 million in 2017. Again, we see this as a very positive for our core business, exiting 2018. Where we saw decline compared to last year, although not on the ordinary, was in the station construction sales business, which tend to go in cycles on yearly basis. We did complete 49 station projects in 2019, and we're still actively building and selling station projects for our customers as they continue to invest in natural gas. But, admittedly, our focus continues to be on fuel volume growth and our existing infrastructure, first and foremost.

The initiatives that are helping drive much of these solid returns are expanding our leadership position in the rapidly growing renewable natural gas market; leveraging our existing nationwide fueling infrastructure and strengthening our financial position, allowing us to continue to focus on both top and bottom line growth.

First, let me talk about our Redeem RNG business. If you follow our Company, you have seen a string of announcements over the last six months about more customer signing up for this fuel that not only has a positive impact on cleaning up today's dirty air problems but more impressively, it can have a tremendous effect on long-term carbon emissions that are at the center of the discussions surrounding climate change. When calculating the entire energy supply chain including the source of electrons put on the grid, operating a vehicle on Redeem is cleaner than even electric battery, in most cases. And as clean as Redeem is scored, it's also important to note that the cost to customers is significantly less than what they would pay for diesel, which is under attack for the harmful impact it has on air quality.

Many refuse companies around the country see the benefits of turning the waste they deliver to landfills into the cleanest fuel available to power their fleets. No other company personifies this more than Republic Services. Republic has been a leader for years in converting their landfill sites in the clean fuel production facilities. The company recently extended a fuel agreement for clean energy to provide Redeem at Republic fueling stations across 21 states around the country for five additional years. This means thousands of Republic Service trucks will operate on a fuel that is expected to reduce their CO2 emissions by 1.3 million metric tons over the period of the contract, which is equal to taking 283,000 cars off the road or planting 22 million trees.

Many other refuse companies have recently signed Redeem fueling agreements with Clean Energy. Municipalities are also realizing the benefits of Redeem with recent fuel agreements by the cities of Long Beach; Montebello; and Fresno, California; Spokane, Washington; and Riverside County, California.

Trucking companies are exploring the need to switch to cleaner alternative fuels and are realizing the easiest and most cost efficient way to achieve the changes regulators are demanding is with Redeem. Overseas Freight, MDB transportation, TTSI and other trucking companies that recently deployed trucks equipped with new Cummins Westport engine and being powered with Redeem in the ports of LA and Long Beach. The new zero emissions natural gas engine is getting great reviews by these first adopters.

The new Redeem customers have allowed us to grow our volume from 20 million gallons in 2014, the first full year we offered the renewable fuel, to 110 million gallons of Redeem in 2018. The increase in Redeem volume for 2017 to 2018 alone was 40%.

As you probably know, other companies are getting into the RNG fueling business, which frankly we see as a positive endorsement for the potential of this market. When we first began selling Redeem, we were in the RNG production side of the business as well, owning, operating production facilities. In March 2017, we sold those facilities to BP for $155 million, which could reach $180 million with some earnouts in order to focus on our core strength of marketing and selling natural gases of vehicle fuel. We then entered into a long-term supply agreement with BP.

Over the next year and a half, both companies realized the benefits of this arrangement, so much so that we’ve broaden the relationship in the fourth quarter last year by increasing the RNG fuel supply amount, allowing Clean Energy to accelerate and expand the distribution of Redeem. Redeem volumes increased 13.8 million gallons in the fourth quarter alone compared to 2017. We are now able to confidently market Redeem across the entire country to municipalities and private fleets. It’s becoming clear that owning a downstream fueling infrastructure will be a big advantage in this expanding market.

We are so bullish on the acceptance and growth of Redeem that a few weeks ago we announced our own long-range sustainability goals that included a commitment to flow carbon-free Redeem to all our stations by 2025. This is especially interesting to note because Clean Energy will be fueling its customers with 100% renewable non-fossil energy 20 years ahead of California’s goal of transitioning the state's power supply to 100% renewable energy. This will allow all of our customers to easily and inexpensively achieve aggressive, low carbon goals well before our EV counterparts.

In the second half of last year, we announced a new and exciting approach to attract the heavy duty trucking market to expand their fleets with natural gas. This could not have happened without the financial backing of our new partner and largest shareholder Total. The biggest obstacle to trucking fleets making the switch has been the incremental cost of the natural gas engine and fuel system. This new program, we call Zero Now, does relate with that by allowing companies lease or purchase a new natural gas, heavy duty truck, equipped with the cleanest engine in the world at the same price as the diesel truck. In addition, these fleets will be able to purchase renewable natural gas fuel at a significant discount to diesel at our extensive network of existing fueling stations that can accommodate heavy duty trucks.

That network was extended during the fourth quarter of last year with three additional truck stop stations in partnership with Union Gas on Canada's busiest trucking forward corridor in Ontario. Our sales team is currently in conversations with most of the largest trucking companies in the country about this offer. We have already signed several deals for new natural gas trucks and have many more in various stages of execution for truck and fuel purchase agreements. I know some and have expected and announced deals right out of the gate. But, the discussions that we're having with these fleets are about deals that take delivery of real, road tested, reliable, zero emission trucks, which will fuel at our existing network of stations, providing a clean renewable fuel. And all that takes time as each fleet has specific tractor specifications as well as lanes to identify for their operations.

This process realistically has eight steps from initial contract to final delivery and decisions representing hundreds of thousands of dollars, if not many millions. We are dealing with very smart operators who understand what is proven technology and what is hopeful. And almost without exception, virtually everyone has expressed strong interest in our Zero Now offering as it mitigates their company’s risk to enter into a green solution that is reliable, tested and has the range needed for heavy duty trucks.

It's very different than putting down a refundable positive a few thousand dollars on a concept heavy duty truck that may or may not come to market anytime in the near future and having access to an appropriate fueling infrastructure that may or may not be built at a price that won’t bust any budget. Another initiative that we began several years ago was to strengthen our balance sheet and turn the company toward sustaining profitability. While we have consistently increased our revenues, we have dramatically streamlined our CapEx and SG&A, allowing us to reduce our convertible debt from a high of $545 million to $50 million which is not due until July of 2020. At the same time, we ended the quarter with $95 million in cash and investments.

Our operating results continue to trend positively, considering 2018 GAAP operating income of $4 million compared to an average operating loss of $65 million per year on a GAAP basis over the last three years.

Below the operating line, the other item I'd like to highlight is our significantly reduced interest costs. We're exiting 2018 at 6 to $7 million run rate of annual net interest expense, compared to net interest expense of $13 million to $16 million for 2018 and 2017, and down from a high of $44 million in 2014. This is all contributing to our goal of exiting 2019 on the path to net income. Looking forward specifically to 2019, we provided guidance on GAAP net loss and adjusted EBITDA, and I know Bob will cover that in more detail in his remarks in a moment.

Let me close by saying, as proud as I -- as we are about our performance in 2018, we are excited about what we are already accomplishing this year and plan to continue that momentum. We heartedly embrace the discussions which are taking place at all levels of government and in business about what needs to be done to tackle serious environmental issues. Natural gas has already played a significant role in putting us on the right track. We’re powering more vehicles with it, especially in renewable natural gas will only accelerate the progress. As I've said before, no other company is better positioned to take advantage of this shift in clean energy, and that is truer today than ever. We’ve worked hard for all the right pieces in the place for customers to easily make the switch to the cleanest fuel in the world.

And with that, I'll hand it over to Bob.

Robert Vreeland

Thank you, Andrew.

Our financial results for the fourth quarter and full year 2018 were in line with our expectations. We ended 2018 within the range of our guidance on adjusted EBITDA, SG&A and market per gallon and we were better than our guidance on our GAAP net loss, even if you adjust for the unrealized gain on our Zero Now fuel hedge of $10.3 million recorded in the fourth quarter. I'll discuss our 2019 outlook at the end of my remarks.

Our volume growth in the fourth quarter of 14% above last year came from CNG and LNG, both benefitting from incremental Redeem gallons related to our expanded BP relationship. CNG volume also increased as a result of growth at NG Advantage and from our refuse sector. In addition, we saw growth in both LNG deliveries compared to a year ago. Redeem volume grew 55% in the fourth quarter to 38.8 million gallons versus 25 million gallons a year ago.

Our revenue for the fourth quarter of 2018 was $96.2 million compared to $89.3 million in the fourth quarter of 2017. The 2018 fourth quarter revenue included $10.3 million in unrealized gain on our Zero Now fuel hedge while last year included $5.9 million of revenue from our previously consolidated compressor subsidiary that is now an equity investment and no longer reported in revenue. Volume growth and to a lesser degree, higher effective prices per gallon on the fourth quarter contributed to the 21% or $13.7 million increase in volume related revenue over the last year, noted by Andrew in his comments today.

Our overall gross profit margin in the fourth quarter of 2018 was $36.6 million compared to $25 million last year. 2018 includes the $10.3 million of unrealized gains on Zero Now fuel hedge while 2017 includes $1.1 million of margin from our formerly consolidated compressor subsidiary. Otherwise, our 2018 gross profit margin increased due to increased volumes.

We delivered 12.4 million incremental gallons in the fourth quarter of 2018 versus 2017 at an effective margin per gallon of $0.264 versus $0.26 last year. This incremental volume at a consistent margin per gallon, drove an additional $3.3 million in gross profit margin for the fourth quarter of 2018 versus 2017. The fourth quarter of 2018 benefitted from higher Redeem renewable natural gas sales and increased LCFS credit revenue compared to 2017.

Our SG&A of $20 million in the fourth quarter of 2018 was $3.8 million or 16% lower than a year ago, reflecting the continued savings from our cost reduction efforts put in place in the second half of 2017. We also recognized $4.8 million in earn-out income associated with our sale of biomethane assets to BP in the first quarter of 2017. This was the second year of a five-year earn-out.

Our GAAP net income for the fourth quarter of 2018 was $6.9 million, compared to a GAAP net loss of $28.3 million a year ago or an improvement of $35.2 million. The unrealized gain on our Zero Now hedge favorably impacted 2018 by $10.3 million, while last year included $6.5 million in charges related to the deconsolidation of our compressor subsidiary and an impairment charge of $7.3 million associated with our LCFS credits, still a significant improvement in 2018, despite these notable items.

Our adjusted EBITDA for the fourth quarter of 2018 was $12.7 million, compared to the negative $9.7 million in 2017 or an improvement of $22.6 million due to better operating results in the absence of various charges in 2018.

We ended 2018 with more cash and investments than debt. And this, after paying down $185 million in convertible debt. As Andrew mentioned, we ended 2018 with $95 million in cash and investments with $50 million in convertible debt due in July of 2020. The only other debt we

have is equipment and facility financing of $34 million, primarily at NG Advantage. As expected, we generated positive operating cash flow in 2018. I'll point out also that our operating cash in 2018 exceeded our purchases of property and equipment. We continue to be diligent and our focused on generating cash as we move forward.

Looking forward to 2019, we will see continued improvement in our financial results as we grow volumes on top of our existing infrastructure. One important point to note is that our guidance here does not include alternative fuels tax credit revenue. Our results for 2018, of course, included the alternative fuel tax credit related to 2017. And while we believe the alternative fuel tax credit will be enacted in some form, we're not including it in our 2019 guidance.

Having said that, we still see improvement in our financial results. And if the alternative fuel tax credit is an active during 2019, those revenues and margin would be incremental to this guidance. In 2018, the alternative fuel tax credit related to 2017 was about $26 million.

Our volumes are anticipated to grow in the low-double-digits and our effective margin per gallon for 2019 is expected to be within a range of $0.24 to $0.28, which is a similar effective margin we are seeing today, but for 2019 on much higher volumes.

Our volume growth will drive incremental gross profit margin. Our station construction sales are expected to range from $25 million to $30 million in 2019 as we see similar patterns of steady, smaller value projects in 2019 we saw in 2018. Our 2019 SG&A is expected to range from $73 million to $79 million, consistent with 2018, but this will also be supporting higher volumes and allow the incremental gross profit margin to drop to our bottom line.

GAAP net loss for 2019 is expected to range from $12 million to $18 million. 2018’s GAAP net loss was $3.8 million but included $26.7 million of alternative fuel tax credit, which is not considered in my 2019 estimate. Also, I'm not including any estimate of unrealized gains or losses related to our Zero Now fuel hedge in our expected GAAP net loss for 2019.

Adjusted EBITDA for 2019 will be in the $50 million to $55 million range, again without the alternative fuel tax credit. On a comparable basis to 2018 without the alternative fuel tax credit, this is around a 60% improvement in adjusted EBITDA. We are expecting positive cash flow from operations for 2019 as well. And depending on the financing put in place with NG Advantage, for its capital projects, we expect operating cash flow to exceed our purchases of property and equipment for 2019.

All in all, we see 2019 as a year to grow volumes, at the same time being able to maintain our capital expenditure and cost structure at or near our 2018 levels. And if the alternative fuel tax credit is passed into law, it’s incremental on top of what we believe is a good plan for 2019.

With that, operator, we'll now open the call to questions.

Question-and-Answer Session

Operator

Thank you. [Operator Instructions] Thank you. Our first question today comes from the line of Rob Brown with Lake Street Capital Markets. Please proceed with your questions.

Rob Brown

Good afternoon and congratulations on nice growth in the quarter. I just wanted to get a little more clarity, is that growth driven much by the Zero Now program or is that -- growth from that program is still yet to come?

Andrew Littlefair

That growth would -- still yet to come. Because remember, those are new contracts with new truck builds and trucks to be delivered. And so, it’s mostly from our core business and from our Redeem.

Rob Brown

Okay, great. And then, on Zero Now, what sort of the size of the truck fleets that are looking at this and size of the rollouts that are being contemplated?

Andrew Littlefair

Well, in terms of the size of the fleets that we're calling on, you could -- as you know Rob, as you could imagine, this is the big fleets, right? So, I mean we're calling on fleets, I think you're asking about the other part of the discussion. But, we're calling on large fleets that have thousands of vehicles. But we're also, we also find interest in fleets that aren’t of the largest of fleets but are very aggressive, right? We often find that those trucking fleets that are trying to gain business from some of the largest fleets are those truck fleets that are between 500 and a 1,000 units. So, we call in those as well, but we're out talking to -- I think we would all considerer to be very large fleet. I think that as you're looking at what is the size of the deals that we're talking about, this is probably your real question is, it’s between 20 trucks and 100 trucks -- 100 units.

Let's face it. This is new product, it’s new engine product, it's -0- some trucks by -- some fleets may be purchasing upwards of what I mentioned. It could be upwards of 1,000 units in a year. But, it's unlikely that they're going to take a bite that big out at first. And so, most of the deals we're working on are -- I would say, they're not test -- we've moved beyond the test age. This is commercial, right? And so, they're looking at 20 trucks to 50 trucks, that sort of size, some that we're working on are as large as 100 units.

Rob Brown

And then, on your margin per gallon. Does that include this 110 gain or the gain on the -- or was that…

Robert Vreeland

No, it doesn’t.

Operator

The next question is coming from the line of Eric Stine with Craig-Hallum. Please proceed with your question.

Eric Stine

Hey. Just sticking with the Zero Now program, and I know that this may be plays around a little bit longer term. But, I think if my math’s right, the specific program that Total is backing is 2,500 trucks, given the value proposition there, the interest you've got, can you just talk about their desire or potential to expand that or maybe other financing vehicles that you may use to expand that, given that there might be a significant uptake?

Robert Vreeland

Well, let's fill it up first, right? But, we've always talked about the -- and I've talked with some well-known financial advisors to the company, and it would be kind of household names that basically said, listen, this is really commercial, that this is good paper, that you're doing a commercial truck lease with a very large, well heeled fleets, and that as you begin to fill up this and roll out these, this paper that you -- there will be interest in this kind of financing. And so, I have talked to my partners at Total and try to keep them interested, and once I fill up the first $100 million, I'll be back at their door for another. But, let's see how we do on the first. But I like to think that there is -- this is really rocket science here. I mean, what is new -- financing of the trucks, there's a lot of room in here between the price of natural gas and diesel. And so, it is -- it enables -- it makes this economic.

And what is unique and what is very appealing to these fleets is what we have been put in place with our friends at Total as well, which is this fuel hedge. Never really before has anybody put in place a bipad fuel hedge, fuel hedging, diesel bio-area [ph] in United States and natural gas at delivery points, and locking in this kind of discount for an extended period of time would love to five years. That is unique. That is very appealing to these customers. It's a little complicated because it's not exactly the way they buy stuff now and it does require them as they look at let's just say for -- in my example, I was talking to Rob a minute ago, at 20 trucks or 50 trucks now, I am asking them to commit to fuel for 50 trucks for five years. Right?

Now, they're enjoying a potentially up to $1 a gallon savings on every gallon for those 50 trucks for five years. So, it’s very appealing, but it is different, and it is a little bit unique, but -- this is unique to us and it is unique to our deal with Total, and really at this point, we haven't had any customers say that they don't like that. So we're -- it’s taking a little longer than I’d like because as I mentioned, we felt -- that's why I mentioned in my remarks, we are asking people to commit to going out and buying trucks and spending millions of dollars on trucks and committing to fuel. So, we're not asking people to buy cell phones here or put in a $2,500 deposit or something. This is real money. And so, it has to go through all the due diligence. And you have to spec trucks and you have to work with the truck dealers and with the engine manufacturers and it goes on and on. So, it’s complicated. But, it’s real and it’s really commercial and it’s kind of exciting.

Eric Stine

Yes, absolutely. Thanks for that. And maybe just turning to the volumes. I think, this is your highest volume level and maybe first double-digit volume year-over-year increase in two years. Obviously, Redeem a big part of that. And I may have missed it. But, did you give a redeem target for 2019 as part of your goal to be 10% plus?

Andrew Littlefair

We didn't, but I think unless Bob corrects me here in the public call, I think it's safe to say Rob that we feel like we're going to enjoy good growth in 2019, and it'll probably be in line with what we saw in 2018. So, I think if you use a 40% growth rate for Redeem for 2019, I think we'd be able to make -- Oh, Eric. I'm sorry, Eric. I think, a 40% growth rate for our Redeem in 2019 is probably a good number. I hope we can do better than that but I think that would get us going.

Eric Stine

Okay. And then, just last one, I mean, maybe longer term you've got your goal now to be 100% RNG by 2025. I mean, are there any hurdles you see to that now that you've got BP backing that? I mean, is that something where -- that's just based on demand for your customers and I mean, where's your confidence that you will have the supply to handle that?

Andrew Littlefair

We’ve talked about this before I think on these calls that I see that as long as the regime and the credit regime stays in place, which we see in California as being locked in for a decade, and I don't see anything really changing at the federal level for quite a while. There's a lot of renewable natural gas coming to market. And I think California alone over the next few years will be able to produce up to a couple of billion gallons of renewable natural gas. That'll take a few years to do. And of course, we're talking about supplying next year 400 some odd million nationwide for whatever it is, if you do the math. So, I think the country can get into the several billions of gallons of renewable natural gas as these dairy farms and wastewater treatment plants and landfills and renewable sources get tapped. It's very viable, and when you start comparing it to what's necessary to do this other stuff that people talk about, there isn't anything that's as commercial and as environmentally friendly and available as this.

I hope, as we're beginning to see this down the port of LA -- I'm kind of switching over to trucks, we're seeing more trucks being introduced into the port right now, and they're all getting renewable natural gas. And when you look at that brand new American-made 12 liter engine that's 90% less nocks and is using renewable fuel, which right now is probably 75% less carbon and when low CI gas comes into the port it'll even be better than that, there isn't anything that can touch that for the economics. And I think that as that happens, you're going to -- the light bulb is going to begin to go off on people and say, wow, America's got a lot of renewable natural gas; there's a lot. Look, over time, I think, we'll be ahead of the crowd, and it's our goal to be all renewable. But, the country will benefit, because you can use a lot of this and blend it, right? I mean a lot of others will get to be 50% renewable, and it's still dramatically cleaner than anything else out there.

Operator

The next question is from the line of Pavel Molchanov with Raymond James. Please proceed with your questions.

Pavel Molchanov

I know we've talked about this every quarter, and here we are more than a year after the last time Congress extended the tax credit. I know it's not in your guidance and rightly so for 2019. Obviously we saw the Grassley- Wyden bill getting introduced a few weeks ago. Just thought I'd get your latest thoughts on the outlook for that passing and anything you're hearing from the Hill.

Andrew Littlefair

You know, Pavel, you follow it as close as anyone and I do too. We're feeling, you know, as I always say, I mean, it's sort of the Wild West out there in Washington. We feel pretty good that the extender package and the alternative fuel taxes in some of those different tax -- extender tax packages. We think it's going to happen. I think, it was -- as you know, for those on the call that actually Senator Grassley and Wyden, so bipartisan, put in on the Senate side, which is not exactly where it would necessarily start, but put in a tax package that had some extenders in it and the alternative fuel tax was in there. So, that's obviously a good sign. We see this increasingly as a bipartisan issue, a recognition at those that we're talking about on the House Ways and Means and also on the Senate side that they need to get this resolved. I think, Pavel, what -- I think it's going to happen in 2019. I'm not sure which vehicle it gets hooked to and when. But, we are very confident, as best we can be that it's going to happen this year. I think what we're probably seeing is that it would be retroactive. Right? So, it would take place for -- what?

Robert Vreeland

2018.

Andrew Littlefair

2018 and 2019. I think, there's a sense that, though going forward as Senator Grassley's talked about on the biofuel tax credit as well, this probably needs to be a -- over time a phase-out of this tax credit. We need to get some certainty for the industry to be able to help move these, to help with these fuels, and that my guess is you're going to see that there's going to be a tax bill that will deal with retroactive a year and forward for this 2019. And then there's probably going to be an effort later this year, I think, to look at some sort of five to seven year phase-down, where the alternative fuel tax and some of those other taxes will begin to phase down over time. And that'd be a good thing and would provide certainty for the industry and for our customers, and so, to answer your question, yes, I think we're going to see the alternative fuel tax soon. And then I think stay tuned later in the year. You may see how it gets addressed in the future.

Pavel Molchanov

On the service revenue line, obviously there is quarter-to-quarter choppiness always, but it does seem like that's kind of struggled even as your product sales have improved. So any sense of what that picture will look like in 2019? I know you're -- I didn't think you're giving any specific guidance for services, but any color on that would be helpful.

Robert Vreeland

Yes. Well, so part of that choppiness is related to, certainly year-over-year, is related to the fact that our Compressor subsidiary had service, a fair amount of service revenue that was in that number, and so that was in '17 and it's not in '18 because now it's down as an equity investment. And then, as of late, I would say that that service, that quarterly service revenue is, you know, fairly steady, and we would see it being somewhat steady to slightly growing if you will into '19. So there's nothing really notable…

Andrew Littlefair

Does he mean construction?

Robert Vreeland

No, service, just O&M, our whole O&M…

Andrew Littlefair

It's growing.

Robert Vreeland

Yes, it's growing. But, we've noted in our comments a couple deals that were not renewed, and those were in service-related, but frankly that area is we continue to see good growth because it really involves a lot of the refuse and the transit. And that area is from a volume standpoint is all growing, so that'll come through in the top line as well.

Pavel Molchanov

Okay. Just a quick question in the sources of revenue table. What is other that added $2.7 million this past quarter?

Robert Vreeland

Yes. Most of that is, we had some natural gas trucks that we had acquired and sold.

Pavel Molchanov

Okay, got it.

Robert Vreeland

Yes. If you recall, back in some filing, we had acquired about 140 natural gas vehicles, and we've put those out into our network.

Andrew Littlefair

I want to talk about -- I want to mention that, Pavel, because I think that's kind of interesting because it's something that comes up once in a while. There was an occasion where we saw about 145 trucks that had basically lost the contract that they were operating on, and we moved in and bought those trucks at about $65,000 apiece. They were a couple years old, had a couple hundred thousand miles on them generally, well maintained very largely. We bought all those trucks. And we sold those to, fleets at our fueling network. And what I thought was interesting is that we were able to sell those trucks better than what the residual value would have been. Because there's always a question of what the residual value is of these natural gas trucks, and people that are looking at it say, well, I just don't know if there's going to be a residual value after four or five years. Well, these beat -- and we got, we sold these trucks into our fueling network at the same price that we bought them. We weren't trying to make money. We were trying to get the gallons appropriately put back into our network, which we did, and those trucks brought a very good value.

Robert Vreeland

And we don't have anymore. So, we're out.

Andrew Littlefair

Yes, we're out.

Robert Vreeland

We're not expecting that…

Andrew Littlefair

Yes. But, that's what that one was.

Operator

Thank you. We have reached the end of the question-and-answer session. And I will now turn the call back over to Andrew Littlefair for his closing remarks.

Andrew Littlefair

Thank you, operator. I want to thank everyone for participating in today's call. And I look forward to updating you on our progress next quarter.

Operator

Thank you. This concludes today's conference. You may disconnect your lines at this time. Thank you for your participation.