How to Run a 24V battery bank in an RV?
Collapse
X
-
Leave a comment:
-
I have found a number of bits and pieces of 24v options.
I have pairs of 12v LED lights in series, 24v water pump, 24v USB chargers etc.Leave a comment:
-
Thank you for the tips! My input will be 24V battery (19-25V) so input will be stable. I will plan to use smaller fuses, probably 20A for both input and output. I don't expect this to pull above 10A as the destination battery will be topped off most of the time. Also considering using a diode, just in case, but not sure if it's needed for this regulator.Leave a comment:
-
I plan to use this regulator: https://www.amazon.com/dp/B01LY8D7U0...I1RNM3QIKLRZOQ
Note: It is recommended to use stable DC power for the input power supply If you use the pulsed DC power provided by the generator, please filter it with capacitor before connecting it to the converter.
Generally, connecting to the battery terminals will be a pretty good "capacitor" and it will likely be OK. Use a fuse on both it's + input and + output wires, and size the wires to match the fuses you use. I'd suggest 30A for the input and 50A for the output.
30A needs 8ga
50A needs 6ag
wire gauge chart https://www.westmarine.com/WestAdvis...e-And-Ampacity Be sure your wire is rated for vibration, that's why I linked to a boating site, not a house siteLast edited by Mike90250; 02-20-2019, 02:33 AM.Leave a comment:
-
I plan to use this regulator: https://www.amazon.com/dp/B01LY8D7U0...I1RNM3QIKLRZOQLeave a comment:
-
This 12V "car" battery would typically be close to fully charged. The idea is to have the 40A DC/DC converter be constantly keeping it topped off (stand by charging / floating at 13.8V).
ThanksLeave a comment:
-
If the DC-DC converter is robust enough to survive, yes, it would work. When batteries are low, they can present a large load for a few minutes, and your DC-DC may not like that. Battery chargers are designed to charge into a low battery and not reset or shut offLeave a comment:
-
Would it be OK to hook up the 12V battery to the 24V/48V system through a DC-DC converter? (I'm thinking of using a converter that puts out 13.8V so that it always keeps the battery topped of). Or would there be any issues with this setup? I know it won't be a "true" charger setup, but for lead acid battery I'm thinking this will work just like a car generator typically works.
Thanks!Leave a comment:
-
You need to get your noodle wrapped around the difference between between Power (watts) and Energy (watt hours) as they are not the same thing. Think of it this way. Your car has a 250 hp engine. How far will it go? You cannot answer because the question is nonsense.
Power = Watts = Voltage x Current
Watt Hours = Watts x Hours = Battery Voltage x Amp Hours
Amp Hours = Amps x Hours
Example a 100 watt light bulb ran for 5 hours uses, 100 watts x 5 hours = 500 watt hours. If that light bulb uses 12 volts would use 500 watt hours / 12 volts = 41.67 Amp Hours. Critical you understand that in detail. Power is a rate at which Energy is being consumed.
So you have a 12 volt 400 AH battery configuration which is perfect for an RV. You would need a panel Wattage of 500 to 700 watts, with a 50 to 60 amp MPPT charge controller to supplement your Electronic Battery Isolator when the engine is not running. Vehicle alternator will do the bulk of power generation. Use 400 AH batteries, not 200 AH batteries as you want to avod parallel configurations.Last edited by Sunking; 04-12-2018, 10:20 AM.Leave a comment:
-
deleted post, duplicate
Last edited by OldSmokey; 04-12-2018, 01:06 PM.Leave a comment:
-
I have done this and my system is 48 Volts.
these are the main components.
1. I have 960 watts of solar feeding a 48 Volt 300Ah battery pack with a Victron 150/35 CC
2. Provide power to the RV with a 48 Volt to 12 Volt buck converter like this one:
https://www.amazon.com/uxcell-Converter-Regulator-Transformer-Waterproof/dp/B01M06Q94K/ref=sr_1_1_sspa?ie=UTF8&qid=1523540004&sr=8-1-spons&keywords=48v+to+12v+converter&psc=1
3. Remove the old WFCO POS 12V converter
4. Provide battery charging and AC inverter functionality with one of these:
The Spartan Power SP-IC2248 48 Volt DC to AC Power Inverter Charger has a 25A charger and a large 6600 surge rating which lasts 20 seconds.
not perhaps the best choice, but a good compromise for my requirements.
5. fit a small group 24 size battery on the tongue for the braking system fail and to power the tongue jack.
6. fit a battery isolator to the truck to charge the group 24 battery.
So I get 12V for the RV main systems with the buck converter
The brakes and jack are powered from their own 12V battery
The 12 V is charged from the battery isolator and I get auto change over when I connect to mains power or generator.
you will need to use 24V versions of these in your case.
Leave a comment:
-
Leave a comment:
-
Sounds good. Where do you suggest buying batteries? I live near Denver, CO. I have Interstate, BatteriesPlus and Sams Local.Leave a comment:
-
Sounds good. Where do you recommend buying a battery? My local places are interstate, batteries plus, and Sams (Denver, CO)
That gives me Duracel or Interstate batteries.
Leave a comment:
Leave a comment: