What’s In Your RV’s Lithium Battery: A Visit to Lithionics

If you’ve followed our blog for a while, you know by now that we’re rolling with a 420 Amp Hour Lithium battery in our motorhome.  Maybe I’ve even mentioned that the battery is from Lithionics.  Well, we’re 6 months or more in with that battery now, and it shows no signs of slowing down.  In fact, we’re at a serviced campground right now, and I HAVEN’T EVEN BOTHERED TO HOOK UP THE ELECTRICITY.  Our battery is so solid that most days, even pulling out the electrical cord is more trouble than it’s worth.

So when we were in Tampa recently for the Florida RV SuperShow, we couldn’t resist the urge to drive across the bay, eat some seafood by the water, and head over to Lithionics’ facility in Clearwater.  There, we met CEO Stephen Tartaglia, and he took us on a tour.  Have a look:

The one thing that really came through for me on this trip was the attention to testing.  For example, each battery that goes out – and I mean every one – is subjected to load testing.  And while it’s being tested, they take FLIR images of the battery to find any anomalies or hot spots in the assembly.  They save all of their results and images and can tell you – even six years later – how much of the original capacity you still have, and how their battery is holding up.

The BMS is something else that’s pretty interesting.  All of the individual cells in the battery have to report in to the BMS every second, or the battery shuts down.  The BMS itself communicates over optical cabling (because optical cables are immune to magnetic and RF interference).  Pretty neat.

Another thing that came up is the safety of the batteries and the particular chemistry they use (LiFePO4).  Lithionics batteries are the only ones I know of that are cleared to ship by air.  Think about that one for a minute…

Anyway, now that I’ve visited the battery mother-ship, there’s a lot more I could tell you about their batteries.  But for now, let’s just say I’m pretty happy with ours.


James is a former rocket scientist, a USA Cycling certified coach, and lifelong fitness buff. When he's not driving the RV, or modifying the RV (or - that one time - doing both at once), you can find him racing bicycles, or building furniture, or making music. In his spare time, he works for a large IT company.

    15 thoughts on “What’s In Your RV’s Lithium Battery: A Visit to Lithionics

    1. Kevin

      THIS has piqued my interest! I hope to eventually dump my 4 Discovery 12v AGMs for a system like this. Caution: nerd-out time!

    2. Kathy Brophey

      On a different note I have a different type of battery question for you. We have a 40′ Fleetwood LE DP, we have 4 AGM batteries connected to our inverter and 3 solar panels up top. We are looking to replace the batteries and have been checking into carbon foam batteries, I thought though some research they looked interesting. Something new in the RV market, I was told they are used in the boating market with a good success rate. Have you heard anything about them? http://www.fireflyenergy.com is there website. Thanks for any and all info you might have. Kathy

      1. James - Post author

        Sounds interesting, but I don’t have any personal experience of knowledge of those batteries.
        Reading the site, it sounds like a different rendition of basic lead-acid chemistry, just pasted(?) onto a different medium.
        The good thing about those, I suppose, is that since they are lead-acid batteries you can probably get by without changing or reprogramming all of your charging sources (alternator, converter, solar, etc.). That would save yo some money. Don’t know if their lifetime cycles are realistic or not. If you get them, I’d be interested to hear your experience after a year!

    3. David

      Just viewed your black tank test and with the Travato’s built in black tank flush, doesn’t that perform the same function as that device you used and make the effort redundant?

      1. James - Post author

        Our Travato doesn’t actually have a black tank flush. (But then again, we don’t really have a black tank…)
        But if your rig DOES have a black tank flush, then yes, I would recommend saving the money, not buying any other gadgets, and using the built in flush system.

    4. Casey Goodman

      Do these batteries charge off solar safely?
      In my research of modernizing my 1997 Rialta, I came across a fuel cell video known as the Bloombox, which is a fuel cell that came out in 2012, and runs off any kind of gas, and I believe hydrogen
      ( not sure on the Hydrogen I need to revisit the video). My question is, has lithionics seen this technology, and have they considered the use of this technology with their battery banks? Or have they looked into the availibility of this system for RV owners?

      1. James - Post author

        Yes, our batteries absolutely do charge safely from our 300 watts of solar.
        It is important that you have a solar charge controller that will properly charge the lithium batteries – at the proper voltages, etc.
        Most lower priced solar charge controllers probably do not have a setting for lithium, so I’d say it is important to get a charge controller that is programmable.
        Sort of the same problem with the inverters that another commenter mentioned.
        If your charge controller can’t be made to charge the lithium batteries properly, you risk damaging or not fully charging the lithium battery.

    5. Jim Weeks

      According to Roadtrek their lithium battery is equal to 2 1/2 golf cart 6 volt batteries. Is that what you’re finding?

      1. James - Post author

        I don’t know the specs of the Roadtrek batteries offhand.
        But two 6 volt golf cart batteries would give you about 220 amp-hours of capacity. And of that, you should only use half, so say 110 amp-hours.
        I find with my battery, I actually have MORE than the rated 420 amp-hours of capacity.
        So, I’d say that in terms of usable capacity, our battery is equal to four pairs of golf cart batteries.

    6. David Golembeski

      The latest video about lithium batteries created some concerns for me. Do I understand that 50,000 data points are being monitored constantly and if one malfunctions, the system shuts down? Doesn’t sound like a reliable source of power to me…why can’t the system “work around” the weak link and soldier on? Also, did I hear that most (or all) of the currently available inverters are not a good match for lithium batteries? We have to wait for inverter technology to catch up? So what is happening now with lithium battery + inverter systems if they aren’t really made for each other?

      1. James - Post author

        Let’s see if I can put your mind at ease.
        50,000 data points aren’t checked every second. Those 50,000 data points are what they collect on each battery at Lithionics before they ship anything out.
        On a second-by-second basis, what happens is each cell in the battery checks in with the BMS. And it’s actually VERY reliable. In six months, we’ve had not a single hiccup from the battery.
        The main things the BMS is checking for are thermal runaway, and over or under voltage. These are “I’m about to catch fire” or “I’m about to be damaged by excessive discharge” kinds of events. And in those cases, yes, you absolutely DO want the battery shutting itself down, because something is really wrong.
        As far as the inverters: If your inverter allows you to program charging currents and voltages in a way that corresponds with what the lithium battery wants to see, then there’s no problem in using it. However, if your inverter/charger only offers fixed profiles for “Wet Cell” and “AGM”, then it won’t properly charge your lithium battery. Some inverters are more easily programmed than others. Better ones, like our Xantrex, will be easily programmable, or offer an appropriate setting for Lithium. That’s the main concern there.

      2. Stephen Tartaglia

        Dear David (and James)
        Each one second, we collect 5 readings on the entire battery assembly. Every single cell inside must report “good health” every one second…so, if a cell fails or the electronics themselves fail, the longest our battery can be “live” or “hot” is one second…..the best safety feature in the industry. Now, rest at-ease….less than 1/10 of 1 percent of all the batteries we ship yearly have a fault code issued…..that means our annual quality control record is 99.9%….failures are super-rare, and if they happen, they are normally caused by incorrectly programmed chargers. Sincerely, Stephen Tartaglia, Director of Engineering, Lithionics Battery

      1. James - Post author

        She was actually holding the camera on this one. Perhaps you’re getting those vibes through the video! lol.


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