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Did you install Solar? What was your estimated costs - desire to charge p100d, 4/2 home & grid tied

Are you happy with Tesla Solar

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Would love to hear your thoughts?

I'm interested in purchasing Tesla solar. I want to pay cash, no loans.
I desire the system to support the following connected devices:
  • Tesla P100D | 12000 W charger
  • Washer/Dryer | 1100 W
  • All electric Kitchen | 5500 W
  • Household lights | 500 W
  • 4 ton Central AC with heat pump | 5000 W
What should a system like this cost (TCO / ROI)?


Well-Known Member
Aug 21, 2013
Los Altos, CA
Are you served by REU, the Redding municipal electric utility? If so, then your payback calculations will be very different than PG&E customers. I only see standard E-1 rates, no TOU, no EV rates. Flat 15.3c/kWh is very reasonable compared to PG&E. You can still save money with solar, but I would make sure that they offer Net Energy Metering. I did not see any reference to solar or NEM on the REU pages under the City of Redding web site.


TSLA shareholder
Supporting Member
One of the most important questions: What is your average kWh usage per month?
Yes, the maximum rated power for your appliances would be relevant if you want to add Powerwall battery storage, but for solar TCO/ROI calculations, knowing your overall energy consumption is key. We also have an all-electric kitchen, for example, but the overall amount of energy used in our kitchen isn't very high.

If you can go on a TOU (time of use) plan with your utility and charge your EV during the lowest rate period, at night, that could be ideal today. On the other hand, with the proliferation of solar in California and beyond, it will likely become cheapest to use electricity during the midday hours, which could negatively affect ROI for many homeowners with solar PV and EVs (such as myself). If I were calculating ROI for a new solar PV system today, I don't think I'd factor in any benefits from TOU. I'd keep things simple, and just look at my average cost per kWh. Then the question is, how much would that same energy cost with PV panels on my roof?

That said, installing PV plus batteries (Powerwalls) would come with an additional benefit, namely, a degree of energy independence. Being able to generate and store your own energy, even when the grid goes down, is a beautiful thing. Regardless of ROI, knowing that you're using clean, renewable energy is certainly a plus.
My electric company has a .159 fixed rate per kilowatt. There is no difference in rates between high/low demand periods.
On average, my house consumes between 1900 to 2600 kilowatts per month. The difference with the range is due to AC/HeatPump demands between the season. With the addition of the Tesla model S will add further to my household usage.

I submitted my info to obtain a quote. I will share my results :)

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