As of most recent estimates, the cost of a BESS by MW is between $200,000 and $420,000, varying by location, system size, and market conditions. This translates to around $150 - $420 per kWh, though in some markets, prices have dropped as low as $120 - $140 per kWh.
Residential BESS pricing in 2026 typically ranges from $700 to $1,200 per kWh installed, depending on capacity and complexity. Here's how costs break down across different home system sizes.
All-in BESS projects now cost just $125/kWh as of October 2025 2. With a $65/MWh LCOS, shifting half of daily solar generation overnight adds just $33/MWh to the cost of solar.
Based on calculations by the Institute for Energy Economics and Financial Analysis (IEEFA), solar plus BESS configurations can deliver electricity at USD0. 20/kWh, compared to the far higher cost of USD0.
Lithium batteries that store surplus solar energy, typically cost between $6800 and $10,700, excluding installation costs. The backup energy will also reduce your dependency on the grid.