Solar to keep fridge running
Hi, hope I posted in the correct category. We have a new Allegro (very nice) with residential fridge. We sometimes want to park it in storage for a few days between trips. I would like to have en...
Forum Discussion
If the fridge uses 7 amps DC via inverter, and runs 16 hrs a day being "on" then that is 112 AH from the batteries per 24 hrs.
To keep up with that, with 7 hours of good sunshine per day, you will need a steady 16 amps from the solar for that 7 hours. You would need about 300w of panels lying flat. It doesn't work like that of course because the sun rises and falls during that 7 hours.
So perhaps make it 500w. Two 250w panels and a 20 or 30 amp MPPT controller to run them.
But--since the sun does not shine like that every day, you need enough battery bank to carry you through until the sun shines again. How much battery is that? "It depends."
To keep up with that, with 7 hours of good sunshine per day, you will need a steady 16 amps from the solar for that 7 hours. You would need about 300w of panels lying flat. It doesn't work like that of course because the sun rises and falls during that 7 hours.
So perhaps make it 500w. Two 250w panels and a 20 or 30 amp MPPT controller to run them.
But--since the sun does not shine like that every day, you need enough battery bank to carry you through until the sun shines again. How much battery is that? "It depends."
