Best system for RV

Lt.Dan

Photon Sorcerer
Joined
Dec 25, 2020
Messages
1,658
Location
Visalia, Ca
I am happy I went with 48v. I'm currently using the Victron IP22 to charge a small 75AH AGM battery for the 12v side. It works well, and the efficiency isn't terrible, but its definitely not ideal. The 48v made everything else so much easier to work with, from wire sizes, tools, etc. Hell I wouldn't be against going higher to 60 or 72v if the equipment was available.
 

CamoGreg

5 yr RV Fulltimer
Joined
Jun 18, 2020
Messages
156
I have a pair of 6V 225ah FLA. I see no reason to remove them as they're in an unheated dedicated compartment that really doesn't give me any extra usable space.

They are 5 years old. Still going strong but I thought when replacement time comes I may opt for AGM replacements due to faster charging and eliminate the venting system. I could gain a little outside storage above the batteries if not for those venting hoses.

I don't draw much on the 12V stuff. Lights are minimal. The furnace fan is likely the biggest draw.

I think they installed that much capacity for moving about which is something I don't do anymore. Jacks up and down, slides in and out, running the fridge on 12V while moving.



Most of that doesn't come into play while stationary. I haven't measured but can hear when the OEM converter fan engages. And it doesn't come on very often. Mostly on cold winter days when the furnace runs often.

I only run the power awning and roof fans occasional in warmer seasons.

It was your thread that me look into the IP22, @Lt.Dan . I hope it works out on my build as well.
 
Last edited:

Lt.Dan

Photon Sorcerer
Joined
Dec 25, 2020
Messages
1,658
Location
Visalia, Ca
It was your thread that me look into the IP22, @Lt.Dan . I hoping it works out on my build as well.
The IP22 is working great. I have plugged it in and been able to totally forget about it. It keeps the small AGM battery a nice storage voltage of 13.2v and occasionally will allow discharge/charge to keep it healthy. 10/10 would buy again.
 

chrisski

Solar Boondocker
Joined
Aug 14, 2020
Messages
3,588
This is about the best 48->12 dc2dc solution I can find.
Orion-Tr48/12-9 (110W)
It would keep the lights on but not a whole lot more.
Victron, Samlex and/or Sterling should address this issue as more RVs go to 48 volts.
For my 35’ fifth wheel, I think that could be good for the 12 volt side. A lot of the high amperage items like the 50 amp leveling jacks get used so little the battery will charge it quickly with the 110 watts.

The one thing it would not keep up with is the normal 9 amp propane blower motor on a cold night. If I were to stay on below freezing temps, I might wake up with a dead battery with the fan running so much.

I have had luck with VIctron’s 24-12 volt 70 amp Orion converter. I have done away with the 12 volt battery and just use the converter. I wish there was a 48 volt version of this Converter.
 

Lt.Dan

Photon Sorcerer
Joined
Dec 25, 2020
Messages
1,658
Location
Visalia, Ca
I originally wanted the 30a model for that reasoning @chrisski, but instead I bought the IP22 20a model, and my 12v appliances have a lot of idle draw, almost never less than 7-8a, and routinely 10-11a with all the lights, roof fans etc on. It is plenty to keep the battery charged with the propane furnace running all night. I can always rely on the 12v side being charged up and good to go.
 

CamoGreg

5 yr RV Fulltimer
Joined
Jun 18, 2020
Messages
156
That should be 30 amps each unless they can be paralleled. I can’t speak to that model but my Victron Orion 24/12/70 can be paralleled.
Says "all models can be paralleled" in the data sheet. Same goes for the IP22.
But it will cost close to $500 to do so. $400 for the IP22
 

12-street

New Member
Joined
Aug 21, 2021
Messages
10
This is about the best 48->12 dc2dc solution I can find.
Orion-Tr48/12-9 (110W)
It would keep the lights on but not a whole lot more.
Victron, Samlex and/or Sterling should address this issue as more RVs go to 48 volts.
Check your house converter -I was able to add an "IQ-LIFEPO Lithium-Iron Batteries Automatic Charge Controller for DLS Charger" to mine to keep 12V charging for a small 4s Lithium battery that runs my Jacks and misc. 12V items that were already in my 38' 5th wheel.
 
Joined
Nov 30, 2019
Messages
13,098
Top