This is sort of an experiment as I don't know exactly how many amps the RV requires when without batteries.
I paid only $35.00 with shipping for the X-Power PSU.
I wouldn't use it as a charger and not certain if a few 12 volt lamps most of which most are LED and the absorption frig would cause an overload.
I rarely use the RV 12 volt lamps when there is 120 VAC. The most RV lamps use at any one time are usually 2. I'm uncertain how many 12 volt amps the absorption frig PCB requires?
When the power was down to 9.5 volts the Norcold frig was still working but started to produce a LO-DC error from it's display so it appears to work fine between 10 and 14 volts.
The RSP-500-15 voltage range is 13.5 to 18 volts (33.4 amps) whereas the RSP-500-12 range is 10 - 13.2 volts (41.7 amps)
The XP Power JPS250PS12 I'm unable to find an output voltage range, the datasheet shows it's output as 12 volts.
The amp rating is 21A when cooled with a cooling fan 18 CFM. This model I believe the fan runs all the time and may be variable.
It has a second amp rating of 17A when convection cooled .
Short Circuit Protection = Trip and restart (Hiccup mode), auto recover
What to look for if there is no voltage output range specs are other specifications.
datasheetIf it doesn't work out I have the Powermax PM4 75 watt or the Parallax 30 amp that needs a fan.
