Recommended Solar Set Up for a Refrigerator to Be Ran Off Grid
Updated 09/29/2025 | Published 05/07/2025
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Question:
I have a 2019 grand design so.itude 375res, it has two six batteries and I want to replace with like 200 amp hour lithium batteries, I do not have solar my question is what do I need to accomplish this, mainly I need enough battery to keep the residential fridge running on travel days fir 5-6 hours and some off grid Im planning on getting a generator also
asked by: Larry G
Expert Reply:
In order to operate your refrigerator off solar power, when you're off grid or traveling, you're going to need probably 4 total batteries with 200-amp hours per battery to accomplish this. This will supply you with a bank of roughly 1200 amp hours of power. We don't offer a 200 amp hour battery but do have 100 Amp Hour item # GP99QR and 300 Amp Hour item # GP26QR lithium batteries.
I recommend the Go Power Solar AE-4 All Electric System with MPPT Solar Controller - 760 Watt Solar Panels item # 342-75010. This kit requires a 4 battery bank and can provide around 200 amp hours of power per day, in optimal conditions. With a 4 battery bank, 200 amp hours per battery, you would have enough power to run the fridge, other appliances, and keep your batteries charged up sufficiently.
A fridge like the Everchill item # 324-000119 consumes about 11 amps per hour off of your house batteries, so it's going to consume 264 amp hours of energy per day. Running it all day long is going to completely deplete a single battery and then some without any charging system providing power to it. Since you have a residential fridge, which will likely draw around the same amount or more depending on the size, you will lose power during the 12v to 120v conversion. You are also going to need a pure sine wave inverter on your Grand Design like the the Go Power item # 34275013, if you current inverter is not capable of inverting to pure sine waves.
If you want to split this up with a generator, you can use a smaller solar set-up like the Go Power Solar Extreme Charging System # 34282185, which includes a inverter Charger, and a battery bank between 250-300 amp hours to run the fridge and other items like lights. You can then use a generator like the 4,500-Watt Portable RV Generator item # 333-0005 to run everything else.
How often do you go off-grid?
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Jerred H.
9/29/2025
Hey, did you decide on a battery setup for your fridge and off-grid needs? I'm curious to know how it worked out for you, as it could really help others planning similar upgrades.