Wheel is not as simple as you say.
Lead Acid in the top 20% of the charge has only 50% efficiency even in bulk part of the charge charge + discharge efficiency is around 70%
Where LiFePO4 is always over 95%
Then is better to add additional solar panels even if you need to double the array size since they are way less expensive than batteries and there is quite a bit off power generated even in cloudy days. Right now is extremely cloudy and my array still output about 20% of the rated output around 1.6A on each of the 8A panels (60 cells 240W panels).
As long as there is no snow on them they will produce from 10% (worst dark and cloudy day in winter) and usually upwards of 20% in most cloudy days.
I do have a small wind turbine 300W that helps right now wind gusts is around 40km/h again a better investment than a larger battery even if not as good as solar PV panels.
I do have the experience of almost a year now powering my house that uses 60 to 90kWh/month (2 to 3kWh/day) with a 2.5kWh LiFePO4 (24V 100Ah) and I only remained without power one night last summer since I was not aware of the capacity left in the battery.
Most of that power is used for cooking during the day directly from the solar array with very little difference from battery.
A energy meter to calculate SOC is extremely important with LiFePO4 where voltage is extremely flat so you can only really now without a counter when is full and when is empty no idea where you are in between.
Lead Acid in the top 20% of the charge has only 50% efficiency even in bulk part of the charge charge + discharge efficiency is around 70%
Where LiFePO4 is always over 95%
Then is better to add additional solar panels even if you need to double the array size since they are way less expensive than batteries and there is quite a bit off power generated even in cloudy days. Right now is extremely cloudy and my array still output about 20% of the rated output around 1.6A on each of the 8A panels (60 cells 240W panels).
As long as there is no snow on them they will produce from 10% (worst dark and cloudy day in winter) and usually upwards of 20% in most cloudy days.
I do have a small wind turbine 300W that helps right now wind gusts is around 40km/h again a better investment than a larger battery even if not as good as solar PV panels.
I do have the experience of almost a year now powering my house that uses 60 to 90kWh/month (2 to 3kWh/day) with a 2.5kWh LiFePO4 (24V 100Ah) and I only remained without power one night last summer since I was not aware of the capacity left in the battery.
Most of that power is used for cooking during the day directly from the solar array with very little difference from battery.
A energy meter to calculate SOC is extremely important with LiFePO4 where voltage is extremely flat so you can only really now without a counter when is full and when is empty no idea where you are in between.
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