Louisville has humid summers and cool winters along the Ohio River, with a mix of older urban houses and newer suburbs.
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Service types
Site assessment
Shade, roof age, structure, and electrical service, before anyone talks about a system size.
Roof-mounted systems
How an array is attached, flashed, and warranted relative to the roof.
Equipment questions
Modules, inverters, and monitoring. Ask what is specified, not what is typical.
Permits and interconnection
The building permit and the utility's permission to operate.