SOLAR BATTERY BACKUP
Keep power when the grid goes out
Compare Q.HOME CORE and Tesla Powerwall 3 for home backup and evening solar use—explained simply.
WHY A BATTERY
How solar battery backup works
A home battery stores electricity for later—after sunset or during an outage. Standard grid-tied solar usually shuts off in a blackout so it cannot energize lines workers may touch. With a battery and the right transfer equipment, selected circuits (or more of the home) can keep running.
Batteries also raise “self-consumption”: more of your solar stays on your property instead of exporting to the utility, which matters when export credits are low.
If you searched for solar battery backup or a Tesla Powerwall 3 installer near you, start with your ZIP—we check what is available locally.
Whole-home vs partial backup
Partial backup powers essential loads—lights, fridge, internet, a few outlets. Whole-home backup aims to cover more circuits and may need more battery capacity and a larger electrical design.
Backup time is not a marketing guarantee. It depends on battery size, how many watts you draw, and whether solar is still producing. We set expectations before you decide.
BATTERY OPTIONS
Q.HOME CORE or Tesla Powerwall 3
Both are respected home batteries, and both pair well with solar. The right one depends on your home, your goals and what you want to keep running in an outage. We’ll help you choose after we look at your home.
PAIRING WITH SOLAR
Better together
Solar charges the battery when the sun is up; the battery covers evening loads or outages. Some products integrate solar inputs tightly (for example Powerwall 3’s integrated inverter pathway); others AC-couple or DC-couple depending on design.
Already have panels? Ask about retrofit options. Starting fresh? See home solar and payment options together so your equipment and way to pay fit together.
QUICK ANSWERS
Battery FAQ
Availability and interconnection rules vary. Your proposal lists the exact model.
How long will a battery last in an outage?
It depends on usable kWh and what you run. A fridge and lights use far less than HVAC or an EV charger.
Can I expand later?
Many systems support additional modules or units within manufacturer limits. Plan the electrical path early.
Do I need solar to have a battery?
Not always, but solar + battery is the common residential pairing for daytime recharge.
Is Powerwall 3 or Q.HOME CORE “better”?
Neither is universally better. Power and energy needs, roof/solar plan, and local availability decide the fit.
Want backup that fits your home?
Share your ZIP and whether you already have solar.