How to Charge Trailer Batteries with the Vehicle's Alternator and Shore Power

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Question:

Hi, I am looking to buy the Redarc BCDC1240D from you to charge my 2 AGM batteries from the vehicle alternator while driving. I also have 200watts solar that will go into the Redarc. IS there any product like the Redarc Dc to DC charger that can ALSO have a 120volt shore power input? Sometimes wed be in one place for awhile with shore power and would like to use that to compliment the solar. Do you have anything like this? or would I need a completely separate shore power circuit, so either alternator/solar OR shower power such as an inverter charger? Your help is much appreciated! Thanks for all the info on your site, it has helped me to get my system planned!

asked by: Dan

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Expert Reply:

I do have options for you but the Redarc In-Vehicle BCDC Battery Charger part # 331-BCDC1240D would not accept AC current from shore power and then use that to charge your two AGM batteries while disconnected from the tow vehicle. The Redarc In-Vehicle BCDC Battery Charger would still be needed while driving but when parked you would need to install a power converter to charge the batteries using shore power.

The correct power converter will vary depending on the A/h of your batteries and the service at the RV park. If you are using a 30 amp service then you would most likely need around a 60 amp power converter like the Progressive Dynamics PD9200 Series Inteli-Power Converter part # PD9260C but if you are using a 50 amp service then you would likely need a 60+ amp power converter like the Progressive Dynamics PD9200 Series Inteli-Power Converter part # PD9280A.

If you are thinking of installing a power converter on your trailer to charge the DC batteries while on shore power then I highly recommend you speak to an RV technician beforehand.

expert reply by: Conner L

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Answer 1

Hello Cale, thanks for getting in touch. We do offer some off-road tires but nothing in a 14". Our smallest off-road tire is the Kenda ST235/75R15 Radial Off-Road Trailer Tire #KE68JR. The ST235/75R15 tires are 9.3" wide and 29" in…

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Answer 2

Thanks for reaching out, Steve! The Kenda ST235/75R15 Radial Off-Road Trailer Tire #KE68JR will be about 1" closer to any fenders and about 1/2" closer to your trailer frame. Unless you're already strapped for clearance I don't see…

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Answer 3

I believe we have just about everything you need, ideally we'd need you to measure your center bolt and u-bolts to make sure the here will fit. So, for a center bolt you can use the Leaf Spring Center Tie Bolt with Nut #38-3TB which measures…

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Answer 4

We do sell round u-bolts used to secure leaf springs to the axle, the correct ones for you will be based on the size of the axle. The Dexter Trailer Axle part #7359765-I for example has a 3,500 lb weight capacity so it is 2-3/8" diameter and a…

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Answer 5

The Dexter Single Axle Heavy Duty Suspension Kit #K71-403-00 uses the Shackle Bolt #007-126-01. The 9/16" portion of this bolt is 2-1/4" long.

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Answer 6

There many possible ways to mount a stabilizer jack such as the #TJ01RT-HD you looked at. Mounting them in the orientation shown the diagram would tend to work a bit better to stabilize the trailer against side to side movement, while having the…

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Answer 7

Definitely looks like the springs are being overloaded and need to be replaced. You can use higher rated leaf springs but, the higher you go the stiffer the ride will be. Since we know the weight class with your axles the next step would be to…

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Answer 8

We can get you the right shackle kit for your single axle trailer with a Dexter 3,500 lb axle, and you can choose from either a standard kit or an upgrade kit. Either will work, though the Upgrade Kit is going to be the best option due to the fact it…

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Answer 9

You can eliminate the bounce in your trailer and smooth your ride with the addition of Sumo Springs. You will have two options, depending on how your leaf springs are mounted on your trailer. If your leaf springs are underslung, meaning they are…

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Answer 10

I can certainly point you in the right direction. Unfortunately we do not have access to Dexter's serial number database, and I cannot recommend springs based off of axle specs. If only it were so easy right? The best way to go about replacing…

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Answer 11

Your trailer should have an ID tag on the trailer tongue that lists the VIN as well as the GVWR (Gross Vehicle Weight Rating) which is the maximum the trailer plus its cargo can weigh. If the trailer doesn't list the GVWR on the ID tag, or if…

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Answer 12

Your trailer likely uses bearings #L68149 and #L44649 but you should check them to be sure. If this is the case I recommend hub and drums #AKHD-545-35-EZ-K if you have E-Z Lube axles with the zerk fitting on the spindle. If you don't have E-Z…

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How to Charge Trailer Batteries with the Vehicle's Alternator and Shore Power

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