Is solar battery storage worth it?
Adding battery storage (such as a Tesla Powerwall, Enphase 5P, or FranklinWH battery) typically adds **$8,000 to $15,000** to the gross cost of a solar installation. Whether this investment makes sense depends on your goals:
1. Resiliency Against Grid Blackouts
Without a battery backup, a solar panel system will automatically shut down during a grid power outage. This safety mechanism protects utility workers. If you need power during an outage, a battery backup isolates your home and keeps critical appliances running.
2. Shifting Time-of-Use (TOU) Rates
If your local electric utility charges high peak rates (typically in the late afternoon/evening), you can charge your battery with solar panels during the day and consume the battery power during peak hours, avoiding high grid electric bills.
3. Maximizing Low Net Metering Returns
In states with low net metering buybacks (avoided cost rates), exporting solar power to the grid yields very little credit. Storing that excess power locally and consuming it at night yields a much higher financial return.