Petenebraska
New Member
- Joined
- Dec 8, 2022
- Messages
- 55
Yes.Is the inverter an eg4 6000 watt all in one?
Yes.Is the inverter an eg4 6000 watt all in one?
Those have a very high idle draw.Yes.
Very bad sign about your installer.My installer says it's negligible.
This is how I understand the connection:You can't have both inverters connected to the ac distribution panel.
Please turn off the 12 volt inverter.
Do you have a dedicated ac2dc converter?
This is how I understand the connection:What is powering the 12v system? What's keeping the 12v battery charged?
Oh dear.I can't turn off the 12v inverter. I lose lights, fridge control and all other 12v systems in the camper. (mainly lights)
This is a terribly inefficient way to convert power. At least some money was saved with the install.and also distributes 120v to original 12v ac2dc converter which is connected to 12v battery, 12v battery is connected back to fuse panel to distribute to 12v system in camper.
The 12 volt unit is a converter, it converts 120 volts shore power to 12 volts dc to run the 12 volt fixtures from AC shore power. There is a much better way to do that, a 48 volt DC to 12 volt dc converter, they are about 97-98% effeciency. Im using Samlex converters to provide 12 volts DC from my 24 volt battery banks. No sense in converting 48 volts DC to 120 volts AC Then reconverting from 120 volts AC to 12 volts DC. There is efficiency loss at every conversion.I can't turn off the 12v inverter. I lose lights, fridge control and all other 12v systems in the camper. (mainly lights)
He said that he's waiting for some parts and that he'll build a plug-and-play DC2DC converter for me to install so I can remove the old 12 v system. I'm fine with installing that myself, and if that fixes the unusually large draw, I can live with it. However, if it makes more sense to remove the absorption fridge in exchange for a compressor, I'll look into doing that as well. Your thoughts??The 12 volt unit is a converter, it converts 120 volts shore power to 12 volts dc to run the 12 volt fixtures from AC shore power. There is a much better way to do that, a 48 volt DC to 12 volt dc converter, they are about 97-98% effeciency. Im using Samlex converters to provide 12 volts DC from my 24 volt battery banks. No sense in converting 48 volts DC to 120 volts AC Then reconverting from 120 volts AC to 12 volts DC. There is efficiency loss at every conversion.
All-in-ones are typically at under 85-90% effeciency when run at low power then the AC to 12 DC converter runs at about 88% effeciency for a net efficiency of 79% or so.
You need a compressor fridge.I"m sure it's running on electric only. And I read this article https://www.beginningfromthismorning.com/refrigerator/ suggesting that you are right about it burning tons of energy. My installer, though, is sure that it's supposed to be more efficient. We're trying to exhaust all possible options before throwing in the towel and buying a new fridge.
The 12 volt unit is a converter, it converts 120 volts shore power to 12 volts dc to run the 12 volt fixtures from AC shore power. There is a much better way to do that, a 48 volt DC to 12 volt dc converter, they are about 97-98% effeciency. Im using Samlex converters to provide 12 volts DC from my 24 volt battery banks. No sense in converting 48 volts DC to 120 volts AC Then reconverting from 120 volts AC to 12 volts DC. There is efficiency loss at every conversion.I can't turn off the 12v inverter. I lose lights, fridge control and all other 12v systems in the camper. (mainly lights)
That's the kind of out of the box thinking I like to read!You need a compressor fridge.
RV refrigerators are not efficient at all. They have. 300-500 watt heating element, no defrost etc. You're making heat to make cold. RV furnaces are also grossly inefficient. Their a/c's are also grossly inefficient. They are made to be cheap, compact and work a couple weeks out of the year.
In comparison, my free craigslist 12cf 20 year old compressor fridge uses about 1.2 Kwh a day. Draws about 120 watts when running.
You can get a nice fridge that uses like 50 watts or .5kwh hours a day if you get new.
Your current fridge is worth $$$ and will probably cover the cost of a compressor model.
The Danfoss compressor refrigerators are very definitely worth the cost, my Grape Solar unit was about $890 U.S. from home cheepo, Grape Solar no longer sells this unit but I have seen it with Sanyo name on it in the Phillipines but sadly not here in the lower 48 , (Native Alaskan for the Continental U.S.)He said that he's waiting for some parts and that he'll build a plug-and-play DC2DC converter for me to install so I can remove the old 12 v system. I'm fine with installing that myself, and if that fixes the unusually large draw, I can live with it. However, if it makes more sense to remove the absorption fridge in exchange for a compressor, I'll look into doing that as well. Your thoughts??
Fascinating!! But for $1200, I'd be money ahead to just buy an off-the-shelf unit from Home Depot?? What prompted you to go with JC?https://jc-refrigeration.com/ Check out these guys. They convert your fridge to a compressor fridge in less then a day. We had our Nevercold converted and love it. Uses a lot less energy.
What kind of fridge??I too have a Samlex 24v all in one with a homebuilt 300ah 24 battery. I can run fridge/lights/furnace and my wifes cpap for several days no problem.
these look like replacement adsorption refrigeration units, not at all like what I am using.https://jc-refrigeration.com/ Check out these guys. They convert your fridge to a compressor fridge in less then a day. We had our Nevercold converted and love it. Uses a lot less energy.
Back then I didn't have the battery/inverter setup I do now. I have the 12 volt compressor model.Fascinating!! But for $1200, I'd be money ahead to just buy an off-the-shelf unit from Home Depot?? What prompted you to go with JC?
Well, it says "compressor" https://jc-refrigeration.com/product-category/dometic-120v-hvac-cooling-unit/ but who knows until you have your hands on it. The website does say they'll mail it to you so you can install it yourself. After I cross reference my fridge model to the right compressor, I may think about that option...these look like replacement adsorption refrigeration units, not at all like what I am using.