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Storage batteries cost between $1,000 to $2,000 per kWh, therefore a typical household’s energy storage system will cost between $8,000 to $16,000 (depending on the size and model).
Commonly used storage batteries and their approximate prices include:
• Enphase: 1.2kWh Enphase AC battery - $2000
• LG Chem: 8.8kWh LG Chem Resu battery - $7855
• Tesla: 13.5kWh Tesla Powerwall 2 battery - $12,350