Is a Home Battery Worth the Investment?
Three factors determine battery ROI: your electricity rate structure, backup needs, and solar export compensation.
Time-of-Use Savings
If peak rates are 2–3× off-peak, a battery saves hundreds per year by discharging during expensive hours. Combined with solar, you can charge from free sunlight and discharge when rates are highest.
Backup Value
Food spoilage from a 24-hour outage: $200–500. Home office downtime: $500–1,000/day. Peace of mind: priceless. AGAIC HyL hybrid inverters switch to battery in under 20ms during blackouts.
Typical Payback
5–10 years for the battery portion of a solar system. After that, 5–10 more years of free cycling.
