wondering if anyone out there has installed a powerwall with an existing solar PV system specifically for TOU savings?
ever since SDGE moved peak times from 4-9pm, it's been increasingly difficult to keep my bills close to zero. when peak used to be 12-6pm, we often had near-zero bills for the year because we were getting paid peak rates for generation from 12-6. since generation is low after 4pm, we aren't getting that benefit anymore and my annual true up will be close to $1800 this year. and that is after signing up for the EV-TOU-5 cheap charging rate of 9c after midnight.
my thinking was, what if you installed a powerwall that is charged after midnight (just like your car), and then fully discharged from 4-9pm each day, charging your home during that time until it's used up, while any solar production after 4p is being sent to the grid at peak rates.
one installer I spoke to didn't seem to agree that it would be beneficial financially, but i did the math and it seems like it should pay for itself within 4-5 years if you look at the cost differential between peak and super off peak for the Summer/Winter rates.
just wanted to see if anyone else out there has done this? if you try to add Powerwall on tesla's website, it suggests at least 3 for my home, but i'm not interested in a backup solution, just a way to offset peak rates.
ever since SDGE moved peak times from 4-9pm, it's been increasingly difficult to keep my bills close to zero. when peak used to be 12-6pm, we often had near-zero bills for the year because we were getting paid peak rates for generation from 12-6. since generation is low after 4pm, we aren't getting that benefit anymore and my annual true up will be close to $1800 this year. and that is after signing up for the EV-TOU-5 cheap charging rate of 9c after midnight.
my thinking was, what if you installed a powerwall that is charged after midnight (just like your car), and then fully discharged from 4-9pm each day, charging your home during that time until it's used up, while any solar production after 4p is being sent to the grid at peak rates.
one installer I spoke to didn't seem to agree that it would be beneficial financially, but i did the math and it seems like it should pay for itself within 4-5 years if you look at the cost differential between peak and super off peak for the Summer/Winter rates.
just wanted to see if anyone else out there has done this? if you try to add Powerwall on tesla's website, it suggests at least 3 for my home, but i'm not interested in a backup solution, just a way to offset peak rates.