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Add A Battery To Solar You Already Have

Adding storage later is common. The details depend on how your system is wired.

AC Coupled Versus DC Coupled

EnergySage on adding a battery to existing solar says an AC coupled battery is the simpler and more affordable option if your inverter is not compatible, and that DC coupled setups are more efficient but more expensive and may require replacing the inverter.

Questions That Decide The Plan

• What inverter do you have, and how old is it?
• Is your main electrical panel large enough?
• Do you want whole home backup or a few circuits?
• Does your utility agreement or net metering plan change when you add storage? Check with your utility.
• Will adding equipment affect your existing warranty or lease terms?

If You Lease Your System

Check with the lease holder first. Changes may need their approval.