Solar Charging in Milwaukee

scott2613 · Jan 14, 2014

The two outdoor charging stations in the front lot at Marshall Auto Body, an HPWC and a 75A Clipper Creek J1772 are now solar powered.
Here's a photo of the 71kW solar array that powers them and the body shop. They are free to all Tesla owners and the shops customers.

772 · Jan 14, 2014

Wow, that is massive! Great work

Tesla 940 · Jan 14, 2014

Do you know what the expected annual electric production is suppose to be?

CalDreamin · Jan 14, 2014

Wow, very nice!

Cottonwood · Jan 14, 2014

Tesla 940 said:
Do you know what the expected annual electric production is suppose to be?

Very gross rule of thumb in the 48 states is 1.5 kW-hr/yr for each DC Watt.

About 100,000 kW-hr/yr, 100 MW-hr/yr, 0.1 GW-hr/yr

swaltner · Jan 14, 2014

Sounds about right on the 100 MWh/year production. I plugged the following inputs into PVWatts 1:

Location: Milwaukee
DC Rating: 71 kW
DC Derate Factor: .9 (guestimate - this is what I use on my 5 kW home system to get realistic estimates)
Fixed Tilt: 10 degrees (guess based on picture)
Array Azimuth: 180 (guess - direct South)

Resulting production estimate: 94,971 kWh/year

I searched the public systems listed on Enphase Energy - Enlighten | Sign in to Enlighten. If they're using the Enphase micro inverters and web gateway, the system isn't currently shared. Would be cool to see live data from a large system like that...

scott2613 · Jan 15, 2014

swaltner said:
Sounds about right on the 100 MWh/year production. I plugged the following inputs into PVWatts 1:

Location: Milwaukee
DC Rating: 71 kW
DC Derate Factor: .9 (guestimate - this is what I use on my 5 kW home system to get realistic estimates)
Fixed Tilt: 10 degrees (guess based on picture)
Array Azimuth: 180 (guess - direct South)

Resulting production estimate: 94,971 kWh/year

I searched the public systems listed on Enphase Energy - Enlighten | Sign in to Enlighten. If they're using the Enphase micro inverters and web gateway, the system isn't currently shared. Would be cool to see live data from a large system like that...

Try eGauge Home Page Go to devices and enter 7573 in the text box. It's been snowing and the panels are under two inches of the white stuff right now.
We will have to wait for better weather to see how well things work. Right now we are working on reducing our peak demand and overall electricity use with the goal of getting all our power from renewables.

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Solar Charging in Milwaukee

scott2613

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772

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Tesla 940

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Cottonwood

Roadster#433, Model S#S37

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