First Time RVers - Batteries
There's all kinds of things to learn when you step into the world of RV! Whether you're a first-time RV buyer looking for some guidance or you've been camping for years and are looking for more information you've come to the right spot! McGovern's RV is here to help answer all of your questions and make sure you feel 100% confident in your battery purchase. We've got some FAQ style answers for you - and if we've missed anything or you'd like a more technical answer please reach out to our team at (780) 539-1814 and our experts would love to share their RV knowledge.
What's the difference between a car battery and RV battery? What about a marine battery?
The biggest difference in a car battery and RV battery comes from how they are used. A car battery is a "starter" battery, meaning that it doesn't have the same prolonged power requirements that a deep cycle battery is designed for. Starting batteries give small bursts of energy and then the cars charger does the work. RV batteries are deep cycle batteries which have a thicker internal lead plate that extends the ability to discharge over time which increases the reserve power. They provide consistent energy to power all of your RV accessories and electronics over time and can be re-charged and depleted without damaging the battery the way that depleting a starting battery would. In a motorhome the starter battery powers the engine to start, but the deep cycle batteries are responsible for powering the appliances and accessories inside!
For marine the difference between battery types becomes a bit more complicated. Marine batteries are also deep-cycle batteries (just like RVs)! Marine batteries also have high energy density that has more power in a smaller package relative to traditional batteries, which helps keep you out on the water all day and optimizes fuel consumption (and with today’s prices, we need all the help we can get!). Marine batteries need the energy to start the engine (same as your car) but they also need to be able to power the electronic boat accessories, withstand the conditions on the water (vibrations, bouncing and shaking from tubing, water skiing, or fishing). Trolling motors, fish-finds and all of the things you use to get a great catch (or to play out on the water) use power – and that requires one heck of a resistant battery to allow you to enjoy.
Battery maintenance extends to marine batteries as well, and keeping the batteries connected to a maintenance charger to keep it fully charged can increase it’s lifespan. Purchasing a marine battery, or a combination of a starter battery and a deep cycle battery would depend on your boat. When in doubt, reach out to an expert!
What are the "types" of RV Batteries?
There are three main types or subclasses of RV batteries. We'll give you a brief description on each to weigh the pros and cons!
1) Flooded lead-acid batteries:
These batteries are the tried and true batteries for RVs, with an approximate lifetime of 2-4 years with proper maintenance this option is a bit less pricey than it's two counterparts. However, it's important to note that these batteries require regular maintenance and monitoring of water levels. If the flooded batteries are damaged or improperly maintained it can result in a spill/leak of battery acid which comes with significant safety risks. Furthermore the flooded battery is only approximately 33% efficient, so if the battery has a 100 amp/hr rating, it will only actually do 33 amp/hr.
2) Absorbed Glass Mat (AGM)
These batteries are the improved flooded lead-acid batteries, as they are sealed meaning that water-level monitoring isn’t required. Furthermore, these batteries have increased resistance to over-charging, heat as well as vibration, and have a higher energy density (more energy for less space!). AGMs also tend to have a longer lifespan before requiring replacement with approximately 3-5 years. Rather than the liquid component of the flooded lead-acid batteries, the AGM have a fibrous encased gel that contains the charge – this difference allows for the no-maintenance required as well as an increased range. Lastly, the AGM battery's increased efficiency is approximately 66%.
3) Lithium-Ion
This battery is the show-boat of RV batteries with lightweight and longer-lasting benefits. Furthermore these batteries have an increased capability to handle deep cycles with higher charge AND increased discharging rate capacity. These batteries have a large storage capacity as well. The downside? To charge a lithium-ion battery does require specific charging equipment. Some RV's come with the advanced charging capability built-in, but it's a worthwhile question to ask your sales representative when you're purchasing your RV! Additionally while these gold-standard batteries have taken the RV world by storm there is a higher initial investment in these batteries. Lithium batteries are able to boast a 99% efficiency rating!
What is the difference between 2 6V or a 12V battery?
Great question! While both of these options have a total of 12 Volts there are some other things to consider. Firstly, 6 Volt batteries must always be used in a set of two, (2, 4 or 6). The 6V batteries must be put in a series to work, therefore if there is an issue requiring repair or replacement of a battery the 6V batteries are more difficult to access and work on. Additionally, while both 2 6V or a 12V battery gives a total 12V energy bank, the 6V batteries have increased capacity and hours of use.
The 12 V flooded lead-acid batteries are a more budget-conscious answer, as you only need to purchase one at a time, they are easier to access if work needs to be done. Should you require increased battery power it’s easier (and cheaper) to upgrade by one battery unit (and not two).However, the 6 Volt battery may have an increased lifetime and will have a higher capacity with a longer reserve time.
Generally, we’d recommend different battery types based on your RV requirements. For a large luxury fifth-wheel or a motorhome the 6V batteries will likely be a better call given the higher capacity to run all of your appliances and accessories. Looking for something a little more budget-conscious? The 12 volt deep cycle flooded battery might be the right call for your camping needs.Part of this consideration is also largely due to your camping style. If you are plugged into shore power the 12V will do everything you need while preserving your bank account. However, if you are an off-grid adventurer and are planning on putting the solar packages to the test the AGM or lithium 6V batteries will make your trip more successful!
What about battery warranty?
Please note that McGovern's RV cannot guarantee or advise on warranty for batteries purchased anywhere except McGovern's RV.
The RV Care brand batteries all have the same warranty (whether you're looking at 12V, 6V, flooded-lead or AGM). Barring a determination of negligence you have a guaranteed 24 months! For other batteries this may require a test in our shop to confirm if warranty will cover your battery replacement. McGovern's RV stands behind our products and we encourage you to ask any and all battery maintenance questions to our team to keep your warranty valid in case of any errors.
How can I protect my battery life?
As always, McGovern’s RV recommends that you consult our service or parts team for advice specific to maintenance of your RV and it’s components. As previously explained, the different battery types require different levels of maintenance and this outline should not be used as a complete guide.
For example, the flooded lead-acid batteries will require regular follow up on water levels and filling with distilled water as needed, and cleaning of the terminals to prevent corrosion. While the AGM batteries do not require this level of babysitting, it’s still a good idea to keep the terminals clean. Lithium batteries are entirely self-sufficient and don’t require water level checks or terminal cleaning as they are sealed.
Charging (and discharging) properly can ensure you get the most out of your battery. First, make sure your battery charger is designed for your battery type – as the chargers are not interchangeable. Before you charge, check the recommended voltage and charge only to this level – overcharging your battery may seem like packing extra for the road, but in reality this can damage the battery and lead to a reduced lifespan.
When discharging – don’t discharge fully! The amount can vary based on the battery type, with lithium batteries capable of discharge of 80%, but lead-acid batteries need to retain approximately 50% of their charge. You should use a battery monitor to track the charge.
Storing your RV batteries over winter time properly (especially in the frigid conditions we see here in Canada) can make a world of difference! If possible, store your RV batteries indoors to protect from the winter weather. The batteries should be tucked away from direct sunlight, this can be accomplished with a tarp or blankets, it’s recommended that your batteries stay at approximately 21°C. And as a rule, keep your batteries charged above 5% at all times!
How can McGovern's help?
Our team would love to help you make an educated decision about your batteries! Whether you’re looking for a battery to haul down south when you snowbird away this fall, something to run alongside you on the water while you look for pike, or a battery that’ll make sure your kids enjoy their time in your bunkhouse RV our team wants to help you figure it out! We can be reached by a phone call or text at (780) 539-1814 with any questions.
Already found the battery for you but you want to make sure you protect your camping investment? Our team can help with that too. Here at McGovern’s RV we take our slogan seriously – your fun is our business! We want to make sure you spend as much time in your RV or boat making memories with your loved ones. Our parts, service and sales team will work together to give you the best advice to protect your RV, so don’t be shy!