Free calculator
EV as home backup
Your vehicle’s battery size and your essential loads → days of vehicle-to-home backup with a bidirectional charger.
Energy for the house
62 kWh
after reserve & conversion
Days of backup
5.1 days
essential loads, no sun
Equivalent Powerwall 3s
4.6
13.5 kWh each
Bidirectional backup
from $19,000
SigEnergy charger + whole-home backup
Vehicle-to-home depends on your exact vehicle, software and the charger’s compatibility list — confirm your model with us and your automaker’s warranty terms before counting on it.
How bidirectional charging worksGet honest numbers for your roof
Our Colorado crew looks up your utility’s current rules, models your roof, and tells you straight — including when solar or a battery won’t pay off.