Home Batteries Explained: Costs, Benefits, and What to Buy in 2025

Executive Briefing

• Stores excess solar energy or cheap off-peak electricity for use during expensive peak hours
• Requires lithium iron phosphate (LFP) chemistry for safety, durability, and reduced fire risk
• Inverter power rating matters — households with EVs or heat pumps need at least 5 kW capacity
• Typical U.S. installed system costs range from $8,000 to $15,000 for 10–15 kWh setups
• Permits and utility approvals may be required before installation, so begin inquiries early
• Professional installation costs are high, making it smarter to maximize capacity upfront