I already own a 10 kW (DC) system we installed in 2016. We paid for it ourselves, and have benefited from low electric bills and generous state incentives ever since. I just purchased my first battery back-up system, an inverter with a large 6 kWh battery that will hopefully arrive today or Monday. For now it'll provide a few hours of power, but it can be charged from shore power, a gas/propane generator, or in the summer from an additional 2.5 kW solar array I plan to set up, dedicated to this system. The system is expandable, I plan to add a second inverter/battery pack so that I can produce 50 amps, and later two or more batteries if it works as well as it looks on paper.I'll soon (next year or two) be taking advantage of a zero-cost-to-me solar system, and I'll use battery backup of the house instead of the $15,000 Kohler whole-house gas generator I had at my last home. Also I'll be sure to buy a BEV that can power the house for a week if the backup battery and solar and grid all let me down at the same time (apocalypse, I guess).
Zero cost solar is widely available. You sign a contract to purchase the solar at below market rate for N years, and the system itself is free (not the battery backup). I have several friends and family who have gone this route, and they just shake their heads in puzzlement that others (like me) don't go that route (assuming you have a standalone home). They don't spend a penny on the system. They save money on their electricity from day one. They have backup power. There's a 30% upfront government tax credit. And in ten years they own the system free and clear.
When you look at the whole system. Solar on your house. Battery backup. Ability of the BEV to power your whole home for a week. And government incentives for buying your BEV and for installing solar... It's kind of a no brainer. I must not have brains, because I'm still holding off one or two years before I pull that trigger at my house.
In 2026 our state incentives run out on our large system, then I will combine everything and set our property up for islanding. With 12.5 kW of power incoming (summer time, winter is a whole other issue) and potentially two weeks of back up battery power (if I get a total of 10 batteries), I foresee my grid use to be near zero for most of the year.
This is the type of home set-up we need to incentivize, including for businesses and apartment buildings, then the grid will not have the issues that are being foreshadowed. Why some people are so dead set against taking advantage of free electricity is beyond me.
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