It depends on your usage and how many batteries you have. Most homeowners can keep essential items running - lights, fridge, Wi-Fi, sump pump - for 12 to 24 hours on a single unit, or much longer with multiple batteries.
Yes. In most cases, a battery can be added later. Empire Solar Solutions will assess your inverter type and system capacity to confirm compatibility.
That depends on your home size and goals. One battery covers essentials; two or more can power nearly everything: HVAC, well pumps, and EV charging included.
