> or the standalone systems, a constant per-energy-unit battery price of $209/kilowatt-hour (KWh) is assumed, with the system costs vary from $380/kWh (4-hour d

> or the standalone systems, a constant per-energy-unit battery price of $209/kilowatt-hour (KWh) is assumed, with the system costs vary from $380/kWh (4-hour duration system) to $895/kWh (0.5-hour duration system). Still seems very low to me. I'm looking at my own 2x powerwall estimate (24 kWh), and it's $450/kWh after all rebates and credits. Maybe they're averaging some state rebate in this methodology.