Battery Backup Electricity Cost in California

State Electricity Price Context

The average residential electricity rate in California is 31.14 ¢/kWh. This provides baseline context for the cost of recharging batteries from the grid.

Battery Recharge Cost Examples

Using state average rate. Recharge cost = capacity × rate. Not including battery purchase cost.

10 kWh battery recharge: about $3.11

13.5 kWh battery recharge: about $4.20

20 kWh battery recharge: about $6.23

National Comparison

The national average rate is 17.57¢/kWh. At that rate, a 10 kWh recharge would cost about $1.76, 13.5 kWh about $2.37, and 20 kWh about $3.51. California's rate is higher than the national average.

Backup Power Context

Batteries may be used for backup power during outages, time-of-use optimization, or solar energy storage. When charging from the grid, the cost depends on local electricity rates. This page provides recharge cost estimates only—not battery purchase cost, solar production, or full system economics.

Transparency

This page estimates recharge cost only. Battery purchase cost is not included. Solar production is not modeled. Actual costs depend on usage patterns, round-trip efficiency, and many other factors.

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