ECONOMIC COMPARISON: OST vs PV+ELECTROLYSIS (100 TWh/year)
METRIC OST PV+Electrolysis
----------------------------------------------------------------------
Collection Area (km²) 123.33 259.44
Net Capacity (GW) 14.27 11.42
Total Capital Cost 60.65 B$ 133.45 B$
Cost per kW 4,250 11,690
LCOE 0.0598/kWh 0.1409/kWh
For people in states where net metering is not provided or even just where electricity rates vary by time of day, hybrid inverters with batteries will reduce your electric costs.
Note, the peak usage shaving you were doing with this system also reduces CO2, even without solar panels. Peak power plants called "peaker" plants are typically less efficient and have higher emissions than baseline plants. For people with solar panels, these systems reduce even more CO2 because they displace grid electricity which uses fossil fuels.
This is not a costly whole house system. It is designed to only cover the circuits in your home that you use most, and provides the additional benefit of protecting those circuits in a power outage.