depends on the clouds
cloudy sky basically reduces everything to nothing
also, there is a sixfold DECREASE of solar energy between winter and summer .... (in most part of the world, beside equator)
so, if you have batteries (yes, 20kwh is a proper sizing for a house) also get a generator,
being grid connected is less "complicated" but a bit more expensive
also, there is a sixfold DECREASE of solar energy between winter and summer .... (in most part of the world, beside equator)
This would be a huge factor as the area where the property is gets proper frigid during winter, so thanks for the heads up.
Quite a few of the "weather forecast sites" have an indication of the daily theoretical production for a reference solar installation
what you should look (if it is available) is the historical data and differences in the various months of the year, for your location
in any case, if you are off grid, you got to have a generator
if only to handle possible faults of the "panels/inverter/batteries"
get one of the smart ones that reduce "speed/power" i there is little load
My strategy is to use the generator to charge the battery bank. This way, the house runs off the batteries all the time. The generator automatically switches the inverter to a 60 amp lifepo4 charger. This allows the generator to run at maximum energy transfer and can charge my batteries quickly. When the batteries are full, I shut down the generator.
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