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Roof is easily accessible with a ladder and it’s a one level house. I just used a window cleaner chemical similar to windex. Took about 20mins. The solar panels were a bit dusty. I could see it from the ground level. I’m just not sure what the proper cleaning chemical is to use for solar panels. J.
We have a home with a flat roof located on the eastern-end of Long Island in NY. We also have a power wall 2 on order and would like to add solar panels. Solar City/Tesla does not install panels on flat-roofed homes located within northeastern states. Presumably because of the potential weight...
I currently have a 6.5kW solar system that puts out 9600 kWh per year and want to add 6 more Sunpower 370 panels. I use around 13,000 kWh per year. Wondering how I figure out if I will not go over 100% of my usage when adding those 6 panels. I assume PG&E will not allow you to generate more...
Bottom line: Tesla has a surfeit of potential customers and is choosing SOP/cookie cutter installs at the moment. So, yes, your options are a cheap $10k roof that will get torn off in favor of a solar roof (and add to the cost), or putting on a "traditional" roof and getting solar whenever Tesla gets around to it.
May 4, 2021. #1. I'm going to go with a dark gray/charcoal standing seam metal roof. There will be zero mystery about long term performance of the roof system and PV system. PV mounting system will clamp to standing seam meaning zero roof penetrations. Panasonic HITT 96 cell panels with ultra low .26% annual degradation after 1st year.
Cost us around £1k to fit bird proofing as we had to get scaffolding put up due to the nature of the roof. And get decent bird proofing, not just some flimsy mesh, as they can sometimes break through, and then you have a real issue. There’s a house nearby where the mesh hasn’t held and it’s a full on pigeon hotel.
For small angles cosine is still near 1, e.g. if you were off 30 degrees (your panels normal is 70 degrees above the horizon (20 degree roof slope) instead of, say, an optimal 40 degrees), cos (30 deg) = 0.866, and you lose about 14% off your annual production. Cheers, Wayne. ftrv8 and BGbreeder.
Install was completed in 1 day (7 AM to 4 PM). The crew were all pretty enthusiastic about the work and Tesla in general. Some have been with the company since the Solar City days. They had 3 licensed electricians working the Powerwall install and 4 guys on the solar install.
The system is set up outside (left to right) with Inverter/Powerwall Plus, the Disconnect (with the big handle), the Gateway 2, and then the utility meter. Main electrical panel is in the basement. The installer mentioned that the utility company may want the power to the house and solar panels turned off when changing the meter to a Net meter.
The frame of the roof, columns and foundation has to be solid and probably in steel: ~$1k. The solar panel on the roof will have the size of 6 x IBC Poly 275 CS5 (992mm x 1650 mm), just to have some comparison Tesla should match: ~ $1k. Battery, charger, inverter and all other electronics should fit into the frame of the foundation: ~$1k.