Green Mountain Power To Offer Tesla Powerwall Starting At $37.50 Per Month this deal looks bad for several reasons first, you have to share access...which means at any point when power cuts out who knows what the exact state of charge it will be at. second, even though they are using the 7kWh version (the one meant for daily usage), they are the ones using it daily to reduce their bills, not yours. you only use it when your power goes out. doesn't seem like you can use it to reduce your peak load costs... third, they are ripping you off pretty hard core. if you want to purchase it outright they are charging you double ($6500) the actual retail sale price of $3k for the 7kWh version. i don't know who in their right mind would sign up for this offer.