Batteries and California Real Estate Transactions

Why storage is becoming a transaction issue

Under the Net Billing Tariff, exported energy is worth considerably less than it was under earlier net metering programs. That has shifted new installations toward storing energy rather than exporting it, so batteries increasingly appear on newer systems — and newer systems are now reaching the resale market.

What to establish

• Ownership. Separate from the solar, and frequently different. Confirm both.
• Warranty terms. Battery warranties are usually stated in both years and throughput or cycles, with a guaranteed remaining-capacity percentage. A battery can be within warranty and still noticeably degraded.
• Permit and interconnection. Storage generally requires its own permitting and utility approval.
• Backup configuration. Whether it backs up the whole house or a critical-loads subpanel changes what a buyer is actually getting.
• Condition and location. Garage, exterior wall, temperature exposure — all affect longevity.

What we do and don’t cover

Battery and storage readiness is part of the standard inspection where storage is present: we identify what’s installed, confirm the configuration and check integration with the rest of the system. A full battery inspection costs additional — tell us what’s on site when you request, and we’ll confirm scope and price before scheduling.

We don’t perform capacity testing that would require discharging the battery under controlled load, and we don’t certify remaining capacity against a warranty threshold.

Sources

• CPUC — Net Billing Tariff decision D.22-12-056
• California Energy Commission — solar equipment lists
• California Public Utilities Commission — Net Energy Metering