ouR escaPOD mods

You still have some ghost draw to account for... Have you ever figured that out?

Curious what you base this on.. " I'll stick with my guesstimate that you'll be 75 amp hours per day or higher in hot weather,"

Originally posted by StephenH Originally posted by Olddawgsrule You still have some ghost draw to account for... Have you ever figured that out? Spec's on your unit state: (.36DC@5/23C), (KWH/24hr) That works out to an 1.15ah average (using 13.1v). Are you testing while empty? That will skew the numbers higher.  Assuming this is your unit: https://www.dometic.com/en-us/outdoor/food-and-beverage/refrigerators/rv-refrigerators/dometic-crx-110e-56279 That is the unit except mine has a mounting flange. Otherwise, it looks the same. The figures would have included the ghost draws. I was testing while empty so the numbers are higher than just the refrigerator power draw. There was also a little LED light use included as well. In any case, while we are using it, there will be other items (lights, fans, etc.) using power as well. In any case, it is workable and I am considering adding another battery in parallel or just replacing the 100AH model with a 200AH model. I also looked into additional solar power. Since the kit I already have has a controller that would handle up to 200W, I could add another 100W suitcase without the controller except that I did not see that available on the Renogy site. I have an inquiry in about that. Since my solar is Renogy, I'm not sure if teaming another panel that is not the same type of cells would be okay. As I said, I don't really have a good way to isolate just the refrigerator draw. Also, when it is full, power use would likely be different also as it would have the mass of the contents to buffer temperature changes. The figures I provided are just a 12 hour test on battery power and are only a rough idea of what use would be like on an actual trip.

My basis is test results for Danfoss vaccine fridges that I worked on and installed in Africa and Latin America. Danfoss has made pretty much the same compressor for going on 35 years now.

Also, you can base it on the COP numbers from the Danfoss spec sheets. Those are pretty accurate. You have to make assumptions about the fridge box insulation performance but that's not too difficult.

Besides, in the real world ppl put warm things in their fridges to cool them down. That's just being human. That uses a lot of energy which the absorption fridges can't handle but the compressor fridges can (up to a point). I learned that the first time the chief in one of the African villages I installed a vaccine fridge in immediately commandeered it to cool down his beer bottles. All my energy calcs went right out the window. I would probably have needed a kw of solar to make him happy.

Around 1990-ish but the bd35 compressors are essentially the same units, as are their COPs. In fact Danfoss markets and is proud that they have been around for over 35 years. Demonstrates their reliability.

The ASHRAE testing published by Danfoss was done with an ambient of 32C or 90F, which gives a COP of about 1.9 for an evaporator temp of -5C. Compressor only not including any fans.

90F is low, I used to test at 40C or 104F ambient, at which point the COP was around 1.5. The current Danfoss spec sheet is dated 2004 btw.