Answering random Redditor’s questions with professional backup: home solar edition

A homeowner asked online whether a solar and battery system could do several things at once: charge batteries from solar, automatically switch the house to battery power during a grid outage, and also let a generator top up the batteries if needed during a long outage. Local installers had told this person it wasn't possible, but energy experts say it is.

FranklinWH, a battery maker, explained that its aGate controller and aPower S battery are built to handle exactly this. The aGate watches the grid and automatically switches the home to battery power when it fails. It also manages generator backup, letting a portable generator be switched in manually or a standby generator start and stop on its own to keep the battery within a set range, such as 20% to 80% charge. The system can even charge from solar and a generator at the same time, which fills the battery faster and can cut how long you need to run the generator. During normal operation, once the battery drops below a set point (20% by default), the system pulls from the grid instead of draining the battery further, and it can send you a phone alert as that threshold approaches.

Other homeowners who'd installed similar systems said Enphase and Sol-Ark setups can do this too, with adjustable settings for when the generator kicks in. The takeaway: if you're shopping for solar-plus-battery backup, this kind of flexible, automatic system exists — it may just take asking the right installer, or reading the manual closely.