A 8kW system will conservatively produce over 30kwH a day on average (yesterday we got 53kwH, for example), so you are saving about $10 a day or $300/month, $3600 per year.
Tesla (https://www.tesla.com/energy/design) no longer installs pure solar without batteries, so let's consider the cost with 1 Powerwall battery, it is $26k without federal tax credit and $19000 with it.
Hence the system pays for itself in just over 7.2 years without incentives and in 5.2 years with incentives. And that includes a Powerwall. Last year you could order a pure solar system where ROI was even better, well under 5 years, maybe under 4 even.
However with a pure solar system you are at the mercy of SGDE and net metering since you have to take energy from them at night.
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timeasmymeasure
no subject
Date: 2021-07-02 04:41 pm (UTC)Look, it is not rocket science, here is a computation.
The rate you are paying here is approximately $.30/kwH (it depends on your plan, but you are unlikely pay much less on average:
https://www.sdge.com/residential/pricing-plans/about-our-pricing-plans/whenmatters).
A 8kW system will conservatively produce over 30kwH a day on average (yesterday we got 53kwH, for example), so you are saving about $10 a day or $300/month, $3600 per year.
Tesla (https://www.tesla.com/energy/design) no longer installs pure solar without batteries, so let's consider the cost with 1 Powerwall battery, it is $26k without federal tax credit and $19000 with it.
Hence the system pays for itself in just over 7.2 years without incentives and in 5.2 years with incentives. And that includes a Powerwall. Last year you could order a pure solar system where ROI was even better, well under 5 years, maybe under 4 even.
However with a pure solar system you are at the mercy of SGDE and net metering since you have to take energy from them at night.