I'm not all that knowledgeable when it comes to advanced electrical engineering, so I'm asking for some advice here.
Here's my problem:
We have several mobile refrigeration units that are powered by batteries (eight 12V AGM batteries wired in series to 48V). The problem is that the built in inverter on this unit won't initiate charging when battery voltage falls to a certain level. It's a design flaw that's not likely to be rectified anytime soon. What I've been doing to temporarily rectify the situation is take two 24V vehicle jump-starters, connect them in series to 48V and connect them to the unit's batteries via jumper cables to effectively "jump start" the system. Once the inverter sees the battery voltage high enough, it will start the charging circuit, I can disconnect the jump starter and go about my day.
What I want to do is design a type of jump starter that doesn't rely on batteries.
I'm looking at using this power-supply for this purpose: MeanWell SE-1500-48
However my concern is the inrush current when first connecting to the discharged batteries. I measured it with an amp-clamp, and with batteries that aren't even fully discharged, I'm seeing a 30amp draw for about 5 or so seconds at which point it begins to ramp down to a nominal 7 amps after about 15 seconds. That's obviously going to exceed the limits of the above power supply. Rather than selecting one that's a lot bigger (and will then require 240VAC input) can I use some sort of inrush current limiter? It seems simple in theory but there's so many to choose from, I have no idea which one to buy.
This one looks like it might work but the rating is 120VAC and up. Would this not work for a lower voltage DC application?