2019 3500 Gas. One of the reasons I purchased a gas. Although, No more Diesels.If you have a diesel, be aware that as far as I have been able to determine nobody has a second alternator kit for the diesel, only the gas engine.
I have friends who have a gasser with a second alternator, and the second alternator is pretty much at the bottom of the engine, somewhat protected by a skid plate.
Please keep us posted about your progress!
If your off grid home is set up completely as 120 vac, then the need for the transformer to make the split phase is eliminated.I’d love to have a 48V system feeding my NH house off grid. I max out at 125 KWH a month there including a one ton split A/C. I’d need a 3000 Watt PSW 48-220 Volt inverter capable of continuous service and something like 200 A-H battery set @ 48V, 1,000-1,200 watts of solar panels to feed it, and a good propane powered generator set to emergency charge. I am seeing van builders approaching this level of infrastructure. I have to ask myself why? My van system has lots more capacity than I need. Could I manage to use more. I guess so but as green as it may be to power anthing off grid it still seems to me to be more than a camping rig needs. I suggest a good energy audit prior to spending and installing such large systems. If you find you need it go for it.
That being said I know of one member with about 600+ watts of solar, lithium set, second generator, and a big inverter. who has to plug in at campgrounds. They don’t have A/C either!
Harry, Thank you, How can I source a 48 volt 2nd alternator for a promaster 3500?Hi, yes we build van electrical systems with 48 volts routinely. The second alternator can be 12 or 48 volts. If it is 48 volts life is easier but it can be done either way. I have done a 48 volt alternator on a promaster yet.
More or less the setup is so that the solar can run the refrigerator and lighter loads. The alternator runs the serious power loads.
What I see is that anytime a customer has a system that depends on only one method of charging, it just doesn't work out. Regardless of what they believe is true when we talk about it, life just doesn't work out that way.
Once you have a serious power system in a van, adding solar doesn't add all that much cost.
Regardless of the DC voltage, a Li based battery pack should be sized to stay at or below C/2, so a 5 kW charging system really needs ~ 10 kW-hrs of battery pack to be within the mfg recommendations.
Most of the issues that happened in the RV industry 48 volt implementations were due to not accepting this reality.
Hi Kevin, 48 volt systems engineering is a real journey. The reasons are:Harry, Thank you, How can I source a 48 volt 2nd alternator for a promaster 3500?