Forum Discussion

Brad1111's avatar
Brad1111
Explorer
Nov 03, 2013

1982 Holiday Rambler Solar panel install questions

Hi everyone! I am an RV/Good Sam newbie, I just got my first motorhome- a 33 foot 1982 Holiday Rambler Imperial - and I love it! I wanted to be able to spend some time boondocking, so I got a solar panel kit, and am piecing together all of what i need. I had a couple questions and would love any help you can give me. I have been studying online a lot-as this is my first time with an RV or solar - so I don't know a whole lot, but have been picking things up, so please forgive any terminology mistakes. Mainly my questions have to do with implementing the setup into this 1982 Holiday Rambler Imperial - because this model doesnt have a lot of basement storage, and how/if I can merge the solar system with what is already there electronically. I'd be happy to post any pics or anything that would help.

1) There is currently one long size house battery in the battery compartment outside, which is sandwiched between the wheel well and the generator compartment. There is no room nearby to add more batteries outside the coach. The outside storage trays that pull out arent deep enough to hold batteries. I have purchased 4 deep cycle batteries for my solar usage. I am wondering if I can just replace the house battery with these 4 batteries (wired in parallel) and use the entire existing house electronic setup? All of the lights and electrical sockets are already running through the system, so there is some kind of "inverter" already, right?

2) And if I can replace the 1 house battery with the 4 deep cycle batteries, where should I put them? Without any outside space my only options are a) build a box inside the cab near the driver seat, where I suppose I would need to build a casing of some sort and add a vent hose - or b) in the closet where the fusebox and breakers are (but is about 12 feet from the current house battery -or c) in the bedroom in back, which is very far, but with the long distance wouldnt i worry about the power diminishing through the wire?

3) If I can just use my new batteries as a bigger battery bank and run the lights and electrical sockets through the house system, can I leave everything how it is and just install the solar panels, through the charge controller directly to the battery bank (with fuses/cut off on each side of the charge controller) without having to make any other modifications?
Im sorry if it is a simple question, but the solar panels through the charge controller is really just a battery recharge system, right? Would it theoretically be like just hooking a battery charger onto the terminals of a battery and letting it charge overnight, where it wouldnt affect any of the pre-existing electric setup on the other side of the battery (in this case like the generator and its ability to charge the battery)?

I probably have a hundred other questions, but maybe Ill start with these, I just want to find out what I can use that I have already, because I spent just about all of my budget on the RV and the solar kit and batteries, so if i can wait to buy some things, but still boondock now, Id prefer to.

My solar system so far: I got four 100 watt panels w/ 40a MPPT charge controller (and the wires/connectors needed for it) , and four 12v deep cycle batteries, and was looking at a digital monitor like the trimetric 2025-RV or meTer that connects right in the Tracer MPPT controller I got in my kit.

- Thanks so much for any help/advice -

Brad

8 Replies

  • I previously had an 1989 HR Imperial and had to purchase a hitch mounted metal storage box for added storage. It worked quite well as long as I didn't put real heavy stuff in it. I don't know if it would be feasible for yhou to store two or more batteries in a hitch mounted box. The box could also serve as a storage place for the panels when they were not in use.
  • Hi Brad,

    Mostly folks have just one bank. Due to space considerations I chose to have two--but I can strap them together to take advantage of the peukert effect.
  • I see what you mean, thanks for your insight on wiring. In addition to the best way to wire the batteries together as the website shows, i was interested in hearing about the effects of replacing a house battery with 4, and if the charge controller just going to the batteries is all i need to do. Or if having an entirely separate bank for solar is preferred.

    And after some checking, it turns out this may not have an inverter anyway! I havent tried to plug anything in while driving, and have been plugged in when not. So with the lights being 12v, they have their own power thing happening. Is is tricky to wire the inverter into the battery/generator/outlet system? Do you only plug directly into your inverter, or do you have wall outlets?
  • The best possible way is to have method #3 from the smartgauge site.

    Connecting to the existing wiring may require pretty large diameter wire to prevent voltage drop.

    The existing compartments may not have enough bracing to handle the weight of four batteries.
  • What does that mean to you, Don? What is the best possible way to wire into the existing setup?
  • Hi Brad,

    I was referring to the wiring.

    I happen to use a largish inverter--but certainly it is not an essential item.

    A 300 watt pure sine wave is very nice to have for charging cell phones, and running computers.
  • Hello Don, thanks for that battery wiring link, I will definitely use that info.

    By "the best possible way" did you mean by adding an inverter?

    If I do not use a hair dryer or anything that needs the high boost that an inverter gives/protects from, why can't I just use the system that is already in my RV?
  • Hi Brad,

    Welcome to RVNET!

    It is probably best to ask one question per thread.

    Most RV's use 12 volt lighting.

    I can't tell you where to put the battery bank but surf here correctly interconnecting multiple twelve volt batteries for correctly wiring them.

    Others may say it doesn't matter--but unless there is a compelling reason to not optimize charging and discharging why not do it the best possible way?