After every outage we get the same question, and the honest answer starts by separating two things that are usually sold together.
Two different problems
Solar changes what you pay. It generates power during daylight and reduces what you draw from the grid.
A battery changes what happens when the grid goes down. It stores energy so specific circuits keep running.
They are frequently bundled, but they solve different problems and carry separate costs. You can do either without the other.
What a battery typically backs up
Most home batteries are sized for essential circuits rather than the whole house — a fridge, some lights, a well pump, internet, medical equipment. Backing up an entire home including central air is a much larger and more expensive system.
The right question is not ‘how long will it last’ but ‘what do I need running, and for how long’.
Who it is genuinely worth it for
Homes on well water, homes with medical equipment, home offices where an outage costs a day’s work, and areas where outages are frequent rather than rare. If your power goes out once every few years for an hour, a battery is a comfort purchase and that is a fine reason too — just a different one.
Questions homeowners ask
Does solar keep working in a blackout?
Not on its own. Most grid-tied systems shut down during an outage for safety. Backup during an outage is what the battery adds.
Can I add a battery later?
Often yes, though it is usually simpler and cheaper if the system is planned for it up front.
How many batteries do I need?
That depends on which circuits you want running and for how long. It is a sizing conversation, not a fixed number.
Next step
Own a home in New Jersey? Book a free roof and bill review. Somebody looks at your roof and your last two bills and tells you plainly whether this makes sense for your house — including when the answer is no.
Book a free roof and bill review
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