future PV investor

Solar Generation Costs on Track to Achieve Grid Parity

New technology and economy of scale is not the only way to grid parity (although new solar ventures like to present it this way). Grid parity can be easily achieved by governmental interventions, e.g., by a sufficiently high carbon emission tax for each kWh generated from fossil fuel. This would inevitable lead to inflation and financial pressure on consumers; more so on those who can barely make their payments today. On the other hand, more expensive energy (>$0.30/kWh) would definitely lead to energy saving, which could be a good thing long term. However, what would be the percentage of renewable energy that would still support any developed economy? Both solar and wind suffer from 0-100% output oscillations based on the weather and time of day. This would require extremely expensive and perhaps inefficient and unstable grid. Or would we just flip the switches off on a wind-less eve?