I don't have a residential fridge but I can tell you what you'll need to do to figure out what you'll need in solar power if you wnat to boondock.
1. You need to know how much power your fridge uses per day. You can purchase a watt-hour meter tnd measure the power consumption of the fridge over a number of days (and conditions) to see how much power it uses.
2. Using the results above, figure out how big a battery bank you'll need to run the fridge for at least 36 hours. Don't forget that lead acid batteries can't be fully discharged because that damages them. If you use golf cart batteries, you can figure on drawing 80% of their rated capacity from them then immediately recharging them if you want to avoid damaging the batteries.
3. Once you have the size of the battery bank determined, you can figure out what you'll need in the way of solar panels to recharge them. For the solar projects I've worked on, I generally figure on no more than 5 hours of sun per day. This accounts for losses from the panels not being pointed at the optimum direction.
Don't forget that for many solar panels, if one cell is shaded then the entire panel has no output. There are panels with internal bypass diodes that don't suffer from this problem.
Phil
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