I just wondered if there is a general rule of thumb on what the correct ratio of solar power to battery capacity would be able to fully charge a battery on an average day during the year for a location quite far North?
So for example if you live pretty much on a similar latitude as Edmonton in Canada, what size of solar panel would you need to say fully charge a 50ah 12v battery on average day? 75w? 85w? 100w?
I have also read somewhere that Monocrystaline solar panels are better for northern climes than Polycrystalline?
I am looking to have a small backup system for emergencies in case of power outages or worse WTSHTF situations with power down for days, weeks even months. Just mostly to run lights and power or recharge small devices like phone, radio, AA rechargeable batteries etc.
I'm planning on having just a small system but one that is dynamic and adaptable. So I will use it to keep a deep cycle battery topped up for use in emergencies (at night) but for normal non-emergency SHTF times besides keeping that topped up I will use a grid tie inverter to put electricity back into the grid and lower my electric bills.
So for example if you live pretty much on a similar latitude as Edmonton in Canada, what size of solar panel would you need to say fully charge a 50ah 12v battery on average day? 75w? 85w? 100w?
I have also read somewhere that Monocrystaline solar panels are better for northern climes than Polycrystalline?
I am looking to have a small backup system for emergencies in case of power outages or worse WTSHTF situations with power down for days, weeks even months. Just mostly to run lights and power or recharge small devices like phone, radio, AA rechargeable batteries etc.
I'm planning on having just a small system but one that is dynamic and adaptable. So I will use it to keep a deep cycle battery topped up for use in emergencies (at night) but for normal non-emergency SHTF times besides keeping that topped up I will use a grid tie inverter to put electricity back into the grid and lower my electric bills.