The Best RV Batteries for Boondocking Off-Grid

If you want to go boondocking in your camper, there’s a lot to consider to outfit your rig for off-grid use – one of them being what kind of deep-cycle batteries you should get to support your boondocking adventures. So, what are the best RV batteries for boondocking on solar power? There is nothing quite like dry camping so getting great batteries for your off-grid solar setup is a huge priority for those of us wanting to camp out in nature, but your RV battery setup will depend on your budget and power needs.

With so many different battery types, from lead acid to lithium ion and sealed deep cycle batteries, all starting at different costs, it’s hard to pick the best RV battery for boondocking. That’s what I hope to help break down for you in this post.

Boondocking RV Battery Basics: Technology

Before picking a battery type, you need to understand the types of RV batteries, materials, and technologies, and how those will fit in your rig and hit your wallet.

The bigger your RV battery bank, the longer you’ll be able to hold power even if you don’t have access to a generator or RV solar panel power. However, many traditional lead-acid deep cycle RV batteries are usually very heavy, and that weight can limit the number of amp-hours you’re able to safely carry in your RV. So first, let’s get into a comparison of each type of boondocking battery, which you need to understand before making a decision.

There are 3 main types of batteries that can work to power the house of your RV on 12 volt electricity. From least to most expensive, the battery types are lead acid, AGM, and lithium.

Lead acid deep cycle batteries are affordable and widely available, but are heavy, offgas fumes, and require maintenance in the form of watering. The normal voltage for these batteries is 12.6 volts, and the amp hours you’ll get out of the battery will depend on the size you get. In order to avoid killing the battery permanently, you should not discharge or use more than 50% of the available amp hours before recharging. The most popular lead acid battery for RVs is the Trojan T-105 6 volt batteries. By tying two of these together, you get a 12 volt battery. Lead acid batteries have lead plates inside and the thickness and maintenance of these plates impacts their lifespan, and they need to be regularly checked and maintained with distilled water.

Another budget choice for a lead acid battery is the Costco deep cycle golf cart battery. These flooded lead acid batteries are made by Interstate and by tying two 6 volts together in series, again, you have a 12 volt battery, and when you tie a few of the series together in parallel, this is a good RV battery bank option for dry camping if you’re on a serious budget. Many users online are quite happy with this setup (as is the author of this blog post!) – but depending on your storage space for the batteries and the amount of power you need, you might need more capacity. For example, if you need to run a portable blender in your RV or even a small dehumidifier, or any other high powered devices or appliances, you might need more battery power.

Keep in mind these batteries are also not fully sealed, so they will require maintenance more often than maintenance free batteries like lithium, and you have to be careful not to fully discharge them as they are considered “dead” when discharged to 50%, and going any further can damage the batteries.

Next up on the rung are sealed AGM batteries. These gel batteries are spill proof because they are fully sealed, and they are in the middle of the price ranges for RV batteries. AGM stands for absorbed glass mat, and these are a gel version of lead acid batteries. Deep cycle AGM batteries are a step up from lead acid in terms of cost and quality, and they don’t require as much babying and maintenance as lead acid batteries – in fact some are maintenance-free and leak free. Still, these are not massively better and should only be chosen if your batteries won’t be accessible or will be in a place that off-gassing is not acceptable. Once again, these often come in 6 volt versions which means you need to add a battery and tie it together in series to get a complete 12v battery – so one set of 6v AGMs is really one 12 volt battery.

Lastly, we have the most efficient best RV battery for boondocking and truly the best type of deep cycle batteries for RV boondocking: lithium batteries. With these, there are many advantages – you can use the entire amp hour capacity without killing the battery and really extend your dry camping trips. They’re also completely maintenance free, spill free, and very long lasting. For example, if you have 100 amp hours of lead acid batteries, you have only 50 usable amp hours. If you have 100 amp hours of lithium batteries, then you actually have 100 usable amp hours. Another benefit is that these batteries are far more compact and lightweight, meaning you can easily fit far more power on any rig without worrying about weight. One of the only drawbacks of these batteries is the cost, as they are the most expensive – but if you do a lot of boondocking, it’s really worth it. The best batteries in this category are the lithium batteries by Battleborn which come with a 10 year warranty. You can easily boondock for days and keep your batteries charged up with some Battleborn batteries and solar panels.

The 6 Best RV Batteries for Boondocking

  1. Battleborn 100AH Lithium Ion Batteries

  2. Li-Ion Lithium Ion Batteries

  3. Renogy Lithium-iron Phosphate 12V 100AH Battery

  4. Lifeline Marine AGM Battery – GPL-4CT

  5. Renogy Deep Cycle AGM Battery

  6. Trojan T-125 6V 240Ah Flooded Lead Acid GC2 Deep Cycle Battery

  7. Optima Batteries 8016

  8. Best Budget Option: 2 Golfcart Batteries (Lead-Acid) From Costco

RV Boondocking Battery FAQs

What’s the difference between my house battery and starter battery?

Your RV house batteries are what power the living portion of your camper. These are the boondocking batteries you’ll need to be able to dry camp, because they power everything from your lights, to your fridge, your pumps, and anything else within the living area.

Your starter battery is like a car battery, but for your RV’s engine. If you have a fifth wheel or a travel trailer, you don’t have a starter battery. But if you have a motorhome, you have a battery near your engine compartment that powers the vehicle electronics and the engine when in motion.

Do I really need to pay more for a lithium ion battery set?

It depends on how long you will be RVing and what your power supply needs are. If you plan to be off grid for long periods of time, or if you plan to full-time RV for a few years, lithium ion batteries are well worth the investment because they will last longer, weigh less, and power much greater loads for the amount of weight and space that they take up.

Why do I need batteries to boondock?

Boondocking, otherwise known as dry camping, is where you’re camping without any hookups. This means the only power supply you’ll have is your battery bank, plus any additional power sources you’ve installed or brought along such as a portable generator. Some RVs also charge their house batteries while driving. Either way, you will need to power your home while out in nature, and electricity has to be stored somewhere. The battery is the foundation of every solar installation, because even if you have all of the solar panels in the world, each night when the sun is down you’re limited to what’s stored in your batteries.

Should I get 12 volt or 6 volt deep cycle battery?

If you get 6 volt batteries, you will still need to tie them together to create a 12 volt battery to be able to power your RV, since most RV power systems are 12V systems. So it doesn’t really matter whether you choose a 6 volt or 12 volt option. Just keep in mind that when you tie two 6 volt batteries together, you double the voltage but keep the same amount of Amp Hours. So for example 2 100AH Lifeline Batteries at 6 volts, tied together to be 12 volts, still only has 100AH of capacity – just at a higher voltage.

How do I maintain my batteries when not boondocking?

Many batteries such as lithium ion and AGM versions are maintenance free which means you don’t need to keep them filled with distilled water, but every battery will go bad if you let it go dead and stay dead for extended periods of time. This is important because the metal plates inside will sulfate and die if they’re not kept charged.

It’s important to maintain the charge of your batteries when you’re not camping, either by using the built in solar panels or by using a battery charger such as a trickle charger that you keep on all the time, or a battery charger that you use every few weeks while your RV is in storage.

What do you think of these battery options, and which would you choose as the best deep cycle RV battery for your boondocking needs? If the budget allows it, we recommend lithium batteries! Costco has a sale on the new LiOn energy batteries every once in a while at 2 for 1400, so keep an eye out for that if you have a Costco membership.

We will be happy to hear your thoughts

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