When California homeowners add battery storage to their solar systems, they typically do so to gain energy independence and protection from grid outages. What many do not realize until later is that, like any complex technology, batteries require periodic attention to ensure they continue performing as designed. Proper solar battery maintenance is not complicated, but it does require awareness and occasional professional service.
How Lithium-Ion Solar Batteries Degrade
Most modern home solar batteries, including popular models like the Tesla Powerwall and FranklinWH unit, use lithium-ion chemistry. These batteries naturally lose a small percentage of their storage capacity each year through normal charge and discharge cycling. Factors that accelerate degradation include extreme heat, consistently charging to 100 percent, consistently depleting to near zero, and extended periods of inactivity.
Manufacturers typically design their battery management systems (BMS) to protect against the most damaging charge patterns automatically. However, software settings can sometimes be misconfigured, and in California’s hot summer climate, thermal management becomes especially important for maintaining battery health long-term.
What Routine Solar Battery Maintenance Looks Like
Good solar battery maintenance begins with regularly reviewing your monitoring data to confirm that your battery is charging and discharging within expected ranges. You should also check that firmware updates are being applied as recommended by the manufacturer, since these often include improvements to the battery management logic.
Physical inspections are also valuable. Verify that ventilation around the battery unit is not blocked, check for any visible signs of swelling or discoloration on the unit’s casing, and listen for unusual sounds during charge and discharge cycles. Any anomalies warrant a call to a certified service technician.
At Simply Solar, battery storage service is available as part of their comprehensive solar service offerings. Their technicians are certified on major battery platforms and can perform diagnostic checks, firmware updates, and physical inspections to keep your storage system operating at peak capacity.
When to Call a Professional
Contact a certified solar battery technician if your battery is not reaching its expected state of charge, if backup power during an outage is shorter than expected, if the monitoring system shows recurring error codes, or if there is any physical change in the appearance of the unit. Early intervention almost always results in simpler and less costly fixes.
Protecting Your Investment for the Long Term
A well-maintained solar battery system can deliver reliable performance for 10 years or more. Consistent solar battery maintenance habits — combined with professional inspections every one to two years — protect your warranty coverage and ensure you are getting the full value from your energy storage investment every single day.