[danans]

> The quote for the solar kit that could produce ~1.5kW (2170W Solar Kit: 7xURE NSP 310W - Mono 60 Cell - All Black Panels + 7xEnphase IQ7 60-Cell Microinverters w/QCables + 1x Enphase IQ Combiner 3 + Wireless Monitoring) was $6.5k.

Remember to take 23% off for the federal tax credit.

> But, I was also considering having a 10kW battery to store that energy and to have a backup power, like Tesla Powerwall - $10k.

That's a not-so-small detail, accounting for $18.5k of the bid! A battery is also pretty unhelpful for reducing the A/C portion of your electric bill, especially since most traditional A/Cs require more than the 20A that the Enphase 10kWh battery can output and will pretty quickly drain any home backup battery that could support that current demand.

> So I've made a quick calculation and spent $100 on the reflective roof paint instead...

$100 in reflective roof paint, while a great measure to take, isn't going to reduce A/C electricity usage more than PV, which has the added benefit of offsetting your other electricity usage when you are not in the cooling season.

[hedora]

The enphase batteries are stackable to get more amperage. However, we were definitely amperage limited when we sized ours. We have a few high amp / low duty cycle devices.

It can definitely run our 60+ amp HVAC system, but not overnight. (We didn't buy it for that, but it's nice that we don't even notice our frequent, short outages until enphase and pg&e email us...)