The most common mistake buyers make is asking "how much does a set cost?" before asking "what kind of house do I have?" A system that fits a rural house with a pump and a big roof is often a waste of money in a city apartment, and the reverse is also true.
Three house types, three very different answers. The differences that matter are not the floor area — they are the roof, the outage frequency and the heaviest load in the house.
Three House Types, Four Real Differences
City apartment
Villa or townhouse
Rural house
Roof for solar
Almost none — shared roof, balcony only
Yes, roof and yard
Yes, large roof, usually unshaded
Outage frequency
Low, mostly storms and grid event...
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