I'm going trailer camping in a few days, and I wanted a shore power connection for my trailer (180 ah, 12 volt, LiFePO4) without spending much, because I won't use it very much. I already had a 40 amp Renogy DC-DC charger, so I figured I would use that as a starting point.
I found a pair of 750 watt, 12 volt, Dell redundant server rack power supplies on e-bay for just under $24. That's 1.5 kw of 12 volt DC action. There was a YouTube video about which pins to bridge with solder to get it to power on, and to slow the fan to half speed (full speed fan on it is very loud). It was incredibly easy to do.
I hooked one with soldered wires into the DC-DC charger, added a switch (really just some blade connectors) to the starter sense wire because if you power the server supply on and the DC-DC on at the same time, the PSU can't deliver power instantly and the converter gets an error, so it needs a few second delay to let the PSU start, then switch on the converter.
Just thought I would share my incredibly cheap (if you already have a DC-DC converter) shore power method.
I'm waiting on 50 amp fuses before I actually install it in the trailer, I know it's not exactly safe in the photos.
I found a pair of 750 watt, 12 volt, Dell redundant server rack power supplies on e-bay for just under $24. That's 1.5 kw of 12 volt DC action. There was a YouTube video about which pins to bridge with solder to get it to power on, and to slow the fan to half speed (full speed fan on it is very loud). It was incredibly easy to do.
I hooked one with soldered wires into the DC-DC charger, added a switch (really just some blade connectors) to the starter sense wire because if you power the server supply on and the DC-DC on at the same time, the PSU can't deliver power instantly and the converter gets an error, so it needs a few second delay to let the PSU start, then switch on the converter.
Just thought I would share my incredibly cheap (if you already have a DC-DC converter) shore power method.
I'm waiting on 50 amp fuses before I actually install it in the trailer, I know it's not exactly safe in the photos.