Tesla powerwall weight 100 kg (battery + electronic) either in 10 kWh or 7 kWh, so between 70 and 100 Wh/kg, similar range than Daimler.
Energy density of Canadian Solar is low for lithium ion, something wrong in specs ?, 155 kg for 5.2 kWh means a 7 kWh Tesla unit of 210 kg instead of 100 kg, this is storage unit for hulk.
- Models 10 kWh $3,500 For backup applications 7 kWh $3,000 For daily cycle applications