We've gotten several estimates. First company (Paradise Energy Solutions) offers a 10 year guarantee on production, so I'm inclined to believe them. Here are the specs on the proposed system:
Proposal #1:
system size 11.31 kW
39 Pelmar 290 panels
1 SolarEdge 7600H inverter
39 SolarEdge P370
Total cost - $33k (before credit)
Proposal #2:
System size 7.7 kW
23 LG 335w panels
Enphase micro inverters
Total Cost - $22k (before credit)
The first system is estimated to produce 9489 kWh a year. This is factoring in 36% shade reduction due to trees that can't be removed. The cost per watt of the system is 2.98 cents (before credit). But the payback on the system is almost 20 years.
The second system is estimated to produce 9600 kWh a year. The cost per watt of the system is 2.9 cents (before credit). But I'm skeptical of the production numbers because they don't seem to account for any shade reduction. And they don't have any kind of guarantee, so he has no stake in the game. He said ("summer would be no problem, winter would be some shading...."), so that's why he said to go with micro inverters to improve output. The payback would be just under 10 years.
I don't think anybody would suggest investing in something that has a 20 year payback.
Any advice?
Proposal #1:
system size 11.31 kW
39 Pelmar 290 panels
1 SolarEdge 7600H inverter
39 SolarEdge P370
Total cost - $33k (before credit)
Proposal #2:
System size 7.7 kW
23 LG 335w panels
Enphase micro inverters
Total Cost - $22k (before credit)
The first system is estimated to produce 9489 kWh a year. This is factoring in 36% shade reduction due to trees that can't be removed. The cost per watt of the system is 2.98 cents (before credit). But the payback on the system is almost 20 years.
The second system is estimated to produce 9600 kWh a year. The cost per watt of the system is 2.9 cents (before credit). But I'm skeptical of the production numbers because they don't seem to account for any shade reduction. And they don't have any kind of guarantee, so he has no stake in the game. He said ("summer would be no problem, winter would be some shading...."), so that's why he said to go with micro inverters to improve output. The payback would be just under 10 years.
I don't think anybody would suggest investing in something that has a 20 year payback.
Any advice?
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