Quote:
Originally Posted by Jasper7821
I just bought a Onan 5500 propane generator and I'm building a 24v battery bank out of eight 6v 225ah batteries. This is for a concession trailer I'm building and wanted a few hours of quiet time running on batteries. Everything in the trailer runs on 110v.
I cannot somehow tap into the battery bank to get 12v out of it correct?
If I install a separate 12v automotive battery how do I charge the battery. Can it somehow be charged from my truck when hooked up to the trailer. And if so, how does the wiring go.
If not, I'd probably have to buy a trickle charger and plug it in overnight a few times a week right?
Thanks
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Is this the LPG Generator model that you purchased? If so, here is the Specification Sheet for that model.
https://powersuite.cummins.com/PS5/P...ets/a-1425.pdf
WRT your 24 VDC Battery Bank by using eight 6 VDC Batteries, I assume that you are planning on connecting each of the four sets of 6 VDC batteries tied in series to form 24 VDC, then the 8 batteries will be connected in Parallel to give you the 24 VDC with about 450+ AH if using the Sam's Club Golf Cart GC-2 Batteries.
The 24 VDC 4000 Watt Inverter/Charger you have chosen will work well with your 24 VDC Battery Bank. I am assuming that the generator will be used to keep the battery bank charged or are you planning to use shore power?
You should NOT tap 12 VDC from your 24 VDC battery bank to start your generator. You will need a separate 12 VDC battery to use for starting the generator. That battery should be charged using either the generator and a 12 VDC battery maintainer or by using shore power. You can also charge the 24 VDC battery bank using the generator or shore power.
If you plan to use the generator for charging all of the batteries, figure on 3-4 hours of run time to do that. It is far more efficient to use shore power than generator power for charging batteries.
Here are a couple of documents that will help you with battery types, inverter's etc.
The 12volt Side of Life (Part 1)
The 12volt Side of Life Part 2
My final comment is regarding your statement about running the battery bank down to 20% BEFORE recharging. Where did you get your information regarding that data?
If you read the very first document listed above, it warns people NOT to use the battery bank to a lower level than 50% SOC. If you do, then the lifespan of your battery bank will be significantly reduced requiring you to purchase batteries far more often than you may want to.
Dr4Film ----- Richard