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Good thing you get to use all of the produced kWh. I don't know about LADWP but for SCE, the buy back rate is very cheap: https://www.sce.com/regulatory/tariff-books/rates-pricing-choices/net-surplus-compensation So a PV system produces just enough kWh is great because it's low upfront costs.

Do you need a special shoes to walk on it when it's wet? I heard that firefighters refuse to go up to solar roofs in case there's a fire.

Does anyone here have an efficiency comparison between Tesla solar roofs and typical Tesla solar panels? Thanks.

Per Tesla website: 6.1kW solar roof for 1,600sf: $22,674 vs 8.16kW solar panels on existing roof: $11,000. I think I will go ahead and install a shingle roof for $10,500 first and don't have to worry about leaks. Then call Tesla once the roof is done.

Derate the main breaker so you can increase the amount of amperes created by solar/PW system per 120% rule of NEC section 705.12. Hi Mod, I was able to use PVwatts website and a 10kW system would produce 16,000 kWh/year. And as of now, SCE surplus buy back rate is $0.02/kWh...

With my 200A panel, I can derate the main breaker to 150A with the load calculation so I can install (2) PWs and a 30A rated solar system.

My power company is SCE. Without solar, I got 20% off with their D-CARE program.

The house is on a four lane street leading to a freeway one mile from my house so the airborne dust could reduce the efficiency.

I know 2.9kW is very small but that number I got from Tesla roof website when I input 1600sf and that's what I got. 5 hours per day is from sunrun website but I'll try to use PVwatts to see the difference. When I entered my address, there's a message: "Unable to determine the latitude and...

I can only input some kWh. Could you please enlighten me with $ amount? 1. Figure out how much you pay per Kwh and how many Kwh you use in a year. $0.2/kWh (currently $0.15/kWh but for the sake of the calculation), 5048kWh/year. 2. Work that out for 20 years. 5048kWh/year x 20 years = 100960...

I'm comparing the costs and would like to go with a better ROI. But if I go with solar then battery is a must.

Yep. They will likely have to add decking which would affect the price. I read it the first minute I saw it yesterday because it's a very good writeup. Thanks for that. I haven't called Tesla yet for the price but will do it soon. I need an ROI because of this orange and apple comparison: 1)...

Speaking of shades, there's an existing tall chimney on the roof and we never use the fireplace for the entire time we bought the house. Should we eliminate the chimney? On a side note, I check Tesla plans for another city on a daily basis (I'm an electrical engineer working for a city far from...

Mine is skip sheathing so I guess Tesla would charge more to replace with smooth sheathing.

Thank you.

Who pays for the ridge vent?

The 1,100sf existing roof replacement is about $15K. How much approximately for a 1,500sf (existing roof + new roof addition) solar roof cost?

If solar roof is installed, can I keep the whirly birds (to vent the hot air in the attic) and the exhaust vent for the bathroom fans? Of course I will ask the Tesla rep when I actually contact them.

Hello All, My existing 1100sf roof is leaking after the contractor added a 450sf California style roof to an probably 20 year old shingle roof. These leaks (in the existing attic) are at the valley where the new roof meets the existing one. These leaks could be there before the construction...