Forum Discussion

Scott_Malkinson's avatar
Oct 24, 2016

generator vs batter bank w/ inverter

Hey guys. Im building an expedite van and im not sure which way I want to go for power usage. I will need to power an espar heater, rooftop a/c, ( coleman cub 9200 btu ) tv, laptop, small lights, possibly an xbox and possibly a small little refrigerator. The 1.7 cubic foot kind. I will need a generator for the rooftop a/c regardless and a battery for the espar.

So, my options are: Larger generator for everything ( I was thinking champion 3500 or 3100 watt inverter generator ) and a single deep cycle battery for the espar. I think the espar can wire directly to the battery so no need for an inverter. Or A large battery bank with an inverter for everything other than the a/c and a smaller generator for the a/c. Get a larger or second alternator to charge the battery bank when im driving, which will probably be everyday, but I may have to sit for several days at times.

Im leaning toward the larger generator and a single battery because it sounds much simpler and don't have to worry about losing power at all. Plus, im going to have to buy a generator anyway for the a/c, but to be honest im a pretty big idiot about this kind of thing so I really don't know what the advantages of either are. I would love to hear some opinions. I also see some people with a battery bank AND a larger generator to charge the bank. If youre going to run a large generator anyway, why not just power directly off the generator and save the money and hassle of a battery bank?
  • Scott Malkinson wrote:
    If youre going to run a large generator anyway, why not just power directly off the generator and save the money and hassle of a battery bank?
    Playing your xbox using a big generator will get old, fast.
  • Some of the Roadtrek models get about 6+ hours of AC use with a Lithium battery bank before needing a recharge. An under hood generator, that runs off of the engine, is used to run appliances, and fast charge the Lithiums.
    I'm a little out of touch with the technology, but others on here know quite a bit about these systems. I think one hurdle is keeping the lithium batteries at a cool temperature.
  • Ivylog's avatar
    Ivylog
    Explorer III
    You are not going to run a AC for very long on batteries and an inverter. You need a generator.
  • Expedite Van??? What's it being used for? Transporting RVs, local deliveries, living in ??? A little more information would be helpful?

    Is the van going to be diesel, gas or propane powered?

    If you're driving it for X-hours a day, then you have the vehicle's 12V system to provide a lot of your power needs and heat.

    Will it be plugged in at times to have 120VAC power to provide heat, lights, battery charging, etc.

    How big is the van for heating and A/C cooling?

    Do you have weight restrictions for generator, A/C, battery and fuel weight?

    Bill