Quote:
Originally Posted by biosurfer1
Oh of course, solar is a complete no brainier here. I meant the value add for a battery on top isn't there.
Living in an HOA, I would be curious to see the financials of a community microgrid. O&M would be the question mark but a community where all houses have solar/storage with a community microgrid for balancing could be an intriguing alternative to typical utility grid connection.
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It is when you consider that Net Metering is/has gone away. This means anything sent to the grid over what is being used, right now, get you nothing. Even in places with partial payments, anything that comes in from the grid is charged at full price. Anything that goes out to the grid is paid at the reduced rate.
SDGE is no longer paying anything for residential solar sent to the grid. If you want to zero out your electric bill, you need energy storage. There is a way to get Net Metering, but you pay through the nose for it for your regular electricty. This is for new installs.
A 10kW system with high cycle lithium batteries (7000-10000 cycles) in Houston will cost about $60K installed, which includes a NG/Propane Generator. I expect this will be $75K in SoCal. If you drop the generator, you could save about $10K.
10kW will produce around 65 kWh per day, or about 24,000 per year.
The first 750 kW on SDGE is $.19 (9000 kWh/yr)
Everything else is $0.39 (15000 kWh/yr)
Value is around $7.5K/yr - So payback for the ENTIRE system is around 10 years without incentives, or 9 without the backup generator.
If you installed this year, the Federal Incentive is 28%, which drops the payback period to about 7 or 6 years. There also might be local incentives.