I only see Europe as your location so i'll use Paris (and guessing 41 deg, facing due south):
In december, that's 1.38h. July 4.78h
So 1500Wh / 1.38h = 1087W of solar for january (1500/4.78=314 july)
www.solarelectricityhandbook.com
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You're very good at guessing !! Of all places; I am in France, just 700 km south of paris.
Okay so that is telling me I'll get a max of 1.38 kWh p day p m2 in Dec.
We are actually around 350 kWh p month so that is 11.3 kWh per day.
That would mean 8,2 m2 of solar panels (11.3 / 1.38)
But then when I look at -for example- Renogy they have a 200W panel that is 27.5x58.7 inch so that is about 1 m2
That would mean 8 panels (rounded for simplicity)
8 x 200W = 1600W 11.3 / 1.6 = 7hours It will mean it produces it capacity in 7 hours?
Sorry but have the feeling something is off here. 7 hours of daylight okay but maybe 3 to 4 hours of real light/sun
Then a 200W panel will never deliver its 200W, especially not in December. So its gonna need even more hours to come to the 11.3kWh
For what i've seen here you may be happy when you get 50% of its rated number in winter. Likely even less.
So something is wrong -? or I'm still not getting it
To get 11.3 kWh in a day I feel I'm more likely to need 11.3 kWh x 200% = 22.6 / 5hours = 4500 w capacity
That divided by 200w panels comes to 22,5 solar panels that would be 22.5 m2 and not 8 m2
I'm certainly not attacking you, don't get me wrong here,
but for all what I've been reading of people being way to optimisitic about performance and capacity and days of 'bad' weather,
I dont believe I'll will have enough with 8.2 m2 panels to come to my desired 11.3 kWh p day. Or is that me being to pessimistic now??
Thanks for your time
