Home Solar Battery Backup Cost Calculator
Choosing between a battery backup system and a gas generator involves more than sticker price. Enter installation costs, expected annual fuel or maintenance costs, and system lifespan to compare total cost of ownership.
About this calculator
Compare the total cost of ownership between a home battery backup system and a gas generator over time, including fuel, maintenance, and installation costs.
Frequently Asked Questions
Which is cheaper long-term, a battery or generator?
Batteries typically cost more upfront but have lower ongoing costs, while generators are cheaper to install but require regular fuel and maintenance spending. The breakeven point depends on how many years you keep the system.
Does this include electricity savings from solar charging?
No, this calculator focuses on backup cost of ownership only. If your battery also charges from solar panels and offsets utility bills, your effective savings would be higher.
How long do home batteries and generators typically last?
Home batteries often last 10-15 years, while gas generators can last 15-25 years with proper maintenance, though this varies by brand and usage.