Hi
I'm looking into if solar/powerwall makes sense and having a hard determining if my assumptions are correct.
I'm in the bay area under the new EV-A rates where peak is 4pm-9pm and off peak is during most of solar operating hours.
Due to this limitation, it appears I can only earn mostly $0.16 per kWh I send back to PG&E from morning till 4pm.
I use about 25 kWh per day on average over 12 months, 50% of which is at peak rates ($0.75 per kWh). Hence non-peak cost per year are about $1K and my peak costs are $2.5K per year. If I install a medium system $15K to handle the 12.5 kWH of non-peak/part peak usage, I would recoup the cost in about 13 years. If I install the same medium system and add powerwalls to store the energy for peak times, I'd recoup the $30K cost (15K solar/15K PW), it would take about 11 years.
Is my math correct? I think PG&E screwed new solar owners with the non-peak hours during most of the solar collection times.
Thank you.
I'm looking into if solar/powerwall makes sense and having a hard determining if my assumptions are correct.
I'm in the bay area under the new EV-A rates where peak is 4pm-9pm and off peak is during most of solar operating hours.
Due to this limitation, it appears I can only earn mostly $0.16 per kWh I send back to PG&E from morning till 4pm.
I use about 25 kWh per day on average over 12 months, 50% of which is at peak rates ($0.75 per kWh). Hence non-peak cost per year are about $1K and my peak costs are $2.5K per year. If I install a medium system $15K to handle the 12.5 kWH of non-peak/part peak usage, I would recoup the cost in about 13 years. If I install the same medium system and add powerwalls to store the energy for peak times, I'd recoup the $30K cost (15K solar/15K PW), it would take about 11 years.
Is my math correct? I think PG&E screwed new solar owners with the non-peak hours during most of the solar collection times.
Thank you.