Battery Charger

They call them a "battery tender". Use this in your search.

 

Depends on the charger, are you looking for a mobile type or stationary charge?

 

I do not know of anything you could use like that, most generators are manual start.

 

what's wrong with the 4 batteries you have.

trucks usually have an alarm when the batteries get low. at least every truck i've been in.

just fire the truck up.

if your gonna mount a generator that you need 2000 watts. then just use the generator for your power needs. then you won't have to worry about the batteries.

i pack a battery charger and i have a small 800 watt generator i bought on sale from harbor freight. just in case i need to jump my truck in the winter. but i don't have anything electrical to worry about other then my laptop and cell phone charger. plus a clock.

 

some RVs have systems like that. I'd check with an RV dealer or Camping World store.

 

A cheap 1000w, or even less, portable generator and a portable battery charger from your auto parts store is the easiest, most cost effective way to do it. If you owned the truck, the options get a lot better. Not sure about your company, but most will allow an inverter/charger if you let them do the work in hooking it up so they make sure it is done correctly. Then all you would have to worry about is a small portable generator you could stick in the side box and pull out when you need it and plug it up on an extension cord to the inverter/charger. The charger will shut off flow to batteries when they are charged and prevent over doing it.

Every truck I have had, I put on an inverter/charger. This one and my last one, I put a weather sealed Xantrex inverter/charger right into the battery box along side the batteries. You can hit it with a high pressure washer and will not affect it. But they are not the cheapest units you could buy, for sure.