Group 24 vs Group 31 Lithium Battery for an RV: Which Is Better? (October 2026)
Choose a Group 24 lithium battery when a smaller case fits your RV better; choose Group 31 when your compartment is built for that larger case. These options are all 100Ah, so fit and verified dimensions matter more than the group number alone.
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Choose a Group 24 lithium battery when its smaller case fits your RV better; choose Group 31 when your compartment is built for that format. In this group 24 vs group 31 lithium battery comparison, all 3 options have 100Ah capacity, so measure first and match the battery to your space and electrical setup.
The LiTime Group 24 measures 10.24 x 6.61 x 8.89 inches. The Redodo Group 31 measures 12.99 x 6.82 x 8.46 inches, while exact dimensions aren't available here for the yeagulch Group 31.
Group size helps narrow the search, but it doesn't replace measuring the actual compartment. Include room for terminals, cables, hold-downs and safe access.
Group 24 vs Group 31 lithium battery: what changes?
The main difference is the case format and its fit, not the capacity of these 3 batteries. Each one is rated at 100Ah, while their group sizes and available dimensions differ.
Group 24 is the more compact format among these choices. LiTime's stated case dimensions are 10.24 inches long, 6.61 inches wide and 8.89 inches high.
Redodo's Group 31 case measures 12.99 inches long, 6.82 inches wide and 8.46 inches high. The yeagulch option is also Group 31, but confirm its exact dimensions before treating it as a fit.
Measure the space in the same order as the battery dimensions. Check height around terminals and any cover, not just the compartment's flat floor.
How do Group 24 and Group 31 compare in size?
Group 24 can suit a tighter compartment, while Group 31 may fit an existing larger battery bay. The actual measurements are what determine fit.
Don't rely on a plastic battery box label alone. Boxes vary, and the battery still needs room for its cables and restraint.
Take measurements at the narrowest points. Include walls, straps, door openings and any nearby wiring that could block installation or maintenance.
Which one gives you more RV power?
None of these options gives you more rated capacity than the others: all are 100Ah. Your RV's energy use and how you recharge will determine whether one battery is enough.
A 100Ah battery may work for lights, controls and other modest loads, depending on how long you use them and how your system is configured. Appliances with higher draw can use stored energy quickly.
Make a simple list of the devices you run, their power needs and daily run time. The guide to sizing a lithium battery for your RV can help turn that list into a capacity estimate.
If you need to run air conditioning from stored power, account for the larger energy demand and inverter setup. Read whether an RV AC can run on battery power before assuming one 100Ah battery will be enough.
Can you expand either battery bank?
The products describe different connection limits, so don't assume their expansion options are identical. LiTime supports up to 4P4S, Redodo up to 4S or 4P, and yeagulch recommends no more than 4 units.
Series and parallel connections do different jobs: series raises system voltage, while parallel adds capacity. Follow the exact battery instructions and use compatible batteries and equipment.
A larger bank can also affect charging time, cable size, fusing and inverter needs. For a larger AC load, see how many batteries a 3000W inverter needs.
Does lithium save weight in an RV?
Each battery here weighs about 22 pounds, but compare against the exact battery you are replacing. Weight can matter for handling and RV payload, though these 3 options are close to one another.
LiTime weighs 21.9 pounds and Redodo weighs about 22 pounds. yeagulch gives its weight as 10 kilograms, roughly 22 pounds.
The product information compares lithium with lead-acid batteries, but your old battery's weight depends on its exact model. Check its label or manual before estimating the change to your RV's total load.
A lighter battery can be easier to carry into a bay, but the compartment still needs a proper hold-down. Follow your RV and battery instructions for mounting and ventilation requirements.
Which Group 24 battery suits an RV?
LiTime is the clearest Group 24 fit when you want stated compact dimensions plus Bluetooth monitoring. Its listed features include a 100A BMS, low-temperature charging cutoff and a 5-year warranty.
The Bluetooth 5.0 feature pairs with the LiTime app for remote monitoring. That can help you check battery status without opening the compartment.
The low-temperature cutoff stops charging at freezing temperatures, according to LiTime's product details. Check the battery instructions for operating and charging limits in your climate.
Which Group 31 battery suits an RV?
Choose a Group 31 option when your compartment is sized for that format and you verify its exact fit. Redodo is easier to assess by dimensions here, while yeagulch is another 100Ah Group 31 choice with a 100A BMS.
Redodo measures 12.99 x 6.82 x 8.46 inches and weighs about 22 pounds. It supports series or parallel connections up to 4S or 4P, and its stated charging methods include a lithium charger, solar with a controller, alternator or generator.
The yeagulch battery also states a 100A BMS and up to 4 units for expansion. Its exact dimensions aren't available here, so verify case size and terminal layout before buying.
What should you check before swapping batteries?
Confirm the fit, charging compatibility and safe mounting before replacing your current battery. A group size match alone doesn't prove that the wiring or charger is suitable.
Check the converter or charger manual for lithium charging support. If the RV charges from an alternator, identify how that circuit handles a lithium battery before making the change.
Verify polarity, terminal type, cable reach and fuse requirements in the manuals. Don't force a cable bend or leave a battery unsecured because the replacement case is smaller.
LiTime and Redodo describe their batteries as unsuitable for engine starting. These are house batteries for RV use, not starter batteries.
How should you choose between Group 24 and Group 31?
Pick Group 24 for a compact measured bay; pick Group 31 when the compartment and cabling are designed for it. Since these picks all have 100Ah capacity, let fit, charging compatibility and the features you want decide.
For a Group 24 battery with known dimensions and app monitoring, consider LiTime. For a measured Group 31 fit with stated dimensions, Redodo is easier to compare; yeagulch is another Group 31 option if its exact size checks out.
If capacity is the bigger question, start with your daily energy needs and then compare bank size. Our guide to the best LiFePO4 batteries for RV house power covers additional options.
The U.S. Department of Energy's battery guidance provides background on energy storage.
For your specific RV installation, follow the battery and vehicle manuals or consult a qualified technician.
Frequently asked questions
Is Group 24 or Group 31 better for an RV?
Group 24 is the better choice when its smaller case fits your compartment and 100Ah meets your needs. Group 31 may suit a bay built for that format.
Both group size and usable space matter, so compare exact dimensions, terminal clearance, capacity and your RV's charging system.
Does a Group 31 battery have more capacity than Group 24?
Group number describes a battery size format, not a guaranteed capacity. The Group 24 LiTime and both Group 31 options here are 100Ah.
Compare the capacity of the exact batteries you are considering instead of assuming the larger case stores more energy.
Will a Group 24 lithium battery fit a Group 31 battery box?
It may leave extra room, but don't assume the fit is secure or suitable. Compare the battery's full dimensions with the box, including space for terminals, cables and any restraint.
Use an appropriate way to secure the battery and follow the RV and battery makers' instructions.
Can I replace an RV lead-acid battery with lithium?
A lithium battery can be a replacement only when its voltage, dimensions, connections and charging requirements suit your RV. Check the converter or charger, alternator charging setup and battery compartment instructions first.
Ask a qualified RV technician if you're unsure how your system handles lithium.
