Thinking about how well a refrigerator could run on solar power alone, without a storage battery.
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@MLE_online With enough thermal mass and pulling the fridge temp down to just above freezing it should hold fine. I've gotten thru power outages running a fridge on generator in daytime only before.
The other consideration is the starting current of a typical 120v fridge compressor. An inverter big enough to do it is going to waste a lot of energy and need some amount of battery for the current pulse. The defrost cycle is a consideration as well.
It's probably much more doable starting with a 12v powered RV/Car style fridge, especially now that tiny inverter compressors are a thing.
@foundthefault I need a fridge with a hand crank like a model T
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@foundthefault I need a fridge with a hand crank like a model T
@foundthefault Someone on bluesky turned me on to this guy who's doing it without battery storage.
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@foundthefault Someone on bluesky turned me on to this guy who's doing it without battery storage.
@foundthefault It looks like he successfully ran it for most of a year with only one spoilage event
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@foundthefault It looks like he successfully ran it for most of a year with only one spoilage event
@MLE_online The documentation is really confusingly organized, but here https://joeyh.name/blog/entry/fridge_0.2/ it says "It ties into the typical offfgrid system of a solar charge controller, battery bank, and photovoltaic panels."
I think they are just software limiting it from consuming energy from the battery in most cases. This would make more sense how the system is able to function being a 1500w inverter connected to a fridge. All the magic is in the controls to limit its consumption, but its using typical charge controller and battery to get a stable DC supply to the inverter.
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@voxdeb @hotarubiko Ice would for sure keep the fridge colder, but having to cycle frozen bottles into the fridge and melted bottles into a freezer to be frozen would be a lot more work than just keeping jugs of cold water in a fridge -- if that was enough to work
Unfortunately, it is not. At least not for more than short periods in an already cool environment. It doesn't take much heat to make cooled water warm.
Ice will last much longer.
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R relay@relay.infosec.exchange shared this topic
