A 10 kWh flywheel that can charge/discharge at 20 kW (lasts for 20~30 min at this power) costs ~11500 USD + installation and control system.
A Tesla Powerwall has 13.5 kWh capacity, delivers power at ~6 kW and costs ~11500 USD.
That doesn't seem a large difference to me.
A 10 kWh flywheel that can charge/discharge at 20 kW (lasts for 20~30 min at this power) costs ~11500 USD + installation and control system.
A Tesla Powerwall has 13.5 kWh capacity, delivers power at ~6 kW and costs ~11500 USD.
That doesn't seem a large difference to me.