Buying Guide
5 Best Group 24 RV Battery in 2026: A Practical RV Guide
Group 24 RV battery picks compared by usable amp hours, cranking versus deep cycle design, and fit in a 10 inch long battery tray, lithium and AGM.
By Hardcastle's RV Editors
10 min read5 products evaluated
Group 24 is a smaller battery case, around 10 inches long, so the question is what chemistry fits into it. A dual purpose AGM gives you engine cranking plus modest house power, while a lithium drop in gives far more usable energy but cannot crank an engine. These five were compared on real usable amp hours, case dimensions and whether the listing separates starting numbers from deep cycle capacity.
Hardcastle’s RV field notes
The Rig Fit Check
A quick way to connect the shortlist to the space, workload and ownership details that matter after the box arrives.
- Start with the job
- Litime 2 Packs 12V 100Ah LiFePO4 Battery leads this shortlist for building a lithium house bank from scratch. Use that fit as a reference point, then compare the alternatives against your own space and workload.
- Specs that separate the picks
- The first details to compare are 2 x 12V 100Ah LiFePO4, 12.8V 100Ah LiFePO4, 12V 90Ah AGM. Confirm the exact model and included components before ordering.
- Trade-off to plan for
- Costs $612.85 even if you only need one battery
The Practical Shortlist
A road-tested-thinking look at 5 options, organized around the job each one suits best.
Best Overall
Litime 2 Packs 12V 100Ah LiFePO4 Battery
building a lithium house bank from scratch
Our take Check price for Litime 2 Packs 12V 100Ah LiFePO4 Battery (opens in a new tab)
Best Lithium Value
12V 100Ah LiFePO4 Battery
cheap lithium upgrade for a house battery
Our take Check price for 12V 100Ah LiFePO4 Battery (opens in a new tab)
Best Dual Purpose Value
Mighty Max Battery MM-G24M
rigs that need one battery to start and run
Our take Check price for Mighty Max Battery MM-G24M (opens in a new tab)
Runner-Up Dual Purpose
Marxon Group 24M Marine Battery Dual Purpose 12V 79Ah 715MCA 550CCA 150RC
owners with a tight, measured tray
Our take Check price for Marxon Group 24M Marine Battery Dual Purpose 12V 79Ah 715MCA 550CCA 150RC (opens in a new tab)
Best for Cranking Power
Interstate Batteries Marine/RV Battery 12V 70Ah 750CCA Group 24 AGM
cold climate starting plus light house loads
Our take Check price for Interstate Batteries Marine/RV Battery 12V 70Ah 750CCA Group 24 AGM (opens in a new tab)
Why Each Pick Made the Cut
Best Overall1 of 5
Litime 2 Packs 12V 100Ah LiFePO4 Battery on Amazon (opens in a new tab)
Litime 2 Packs 12V 100Ah LiFePO4 Battery is the better fit when building a lithium house bank from scratch.
Best for
- building a lithium house bank from scratch
Why it made the shortlist
The intended use case is building a lithium house bank from scratch. The documented setup centers on 2 x 12V 100Ah LiFePO4, bluetooth 5.0 monitoring, 100A BMS, low-temp cutoff.
What separates it on paper is two 100Ah batteries make a 200Ah house bank. Its 2 x 12V 100Ah LiFePO4 specification sits at the lower end of the comparable range in this 5-product comparison. Treat the battery platform and included charger as part of the fit, not just the headline number.
Before committing, account for costs $612.85 even if you only need one battery. Confirm whether the battery and charger are included with the exact package. Check platform compatibility and published runtime against the area or workload you need to cover.
Key dimensions & specs
- 2 x 12V 100Ah LiFePO4
- Bluetooth 5.0 monitoring
- 100A BMS, low-temp cutoff
Pros
- Two 100Ah batteries make a 200Ah house bank
- Bluetooth app shows charge state without opening the compartment
- Low temperature cutoff protects cells in cold weather
Cons
- Costs $612.85 even if you only need one battery
- Cannot crank an engine like an AGM can
Best Lithium Value2 of 5
12V 100Ah LiFePO4 Battery on Amazon (opens in a new tab)
Choose 12V 100Ah LiFePO4 Battery for cheapest 100Ah lithium option in this comparison.
Best for
- cheap lithium upgrade for a house battery
Why it made the shortlist
12V 100Ah LiFePO4 Battery is positioned for cheap lithium upgrade for a house battery. The documented setup centers on 12.8V 100Ah LiFePO4, 21.6 lb, 6.49 x 10.24 x 8.98 in.
The feature doing most of the work here is cheapest 100Ah lithium option in this comparison. Its 12.8V 100Ah LiFePO4 specification sits at the upper end of the comparable range in this 5-product comparison. Treat the battery platform and included charger as part of the fit, not just the headline number.
The practical constraint here is cannot be used as an engine starting battery. Confirm whether the battery and charger are included with the exact package. Check platform compatibility and published runtime against the area or workload you need to cover.
Key dimensions & specs
- 12.8V 100Ah LiFePO4
- 21.6 lb
- 6.49 x 10.24 x 8.98 in
Pros
- Cheapest 100Ah lithium option in this comparison
- Weighs 21.6 lb, far less than lead acid
- Fits Group 24 compartments as a drop in swap
Cons
- Cannot be used as an engine starting battery
- Bluetooth and heating features are not listed
Best Dual Purpose Value3 of 5
Mighty Max Battery MM-G24M on Amazon (opens in a new tab)
Mighty Max Battery MM-G24M makes the shortlist because cranks an engine and runs house loads.
Best for
- rigs that need one battery to start and run
Why it made the shortlist
This model is aimed at rigs that need one battery to start and run. The documented setup centers on 12V 90Ah AGM, 550 CCA, 700 CA, group 24M dual purpose.
The most useful documented advantage is cranks an engine and runs house loads. Its 12V 90Ah AGM specification sits at the lower end of the comparable range in this 5-product comparison. Treat the battery platform and included charger as part of the fit, not just the headline number.
The main limitation to plan around is only about half the 90Ah is safely usable. Confirm whether the battery and charger are included with the exact package. Check platform compatibility and published runtime against the area or workload you need to cover.
Key dimensions & specs
- 12V 90Ah AGM
- 550 CCA, 700 CA
- Group 24M dual purpose
Pros
- Cranks an engine and runs house loads
- 90Ah capacity beats the Marxon's 79Ah
- Sealed AGM design never needs watering or topping up
Cons
- Only about half the 90Ah is safely usable
- Heavier than lithium of similar nominal capacity
Runner-Up Dual Purpose4 of 5
Marxon Group 24M Marine Battery Dual Purpose 12V 79Ah 715MCA 550CCA 150RC on Amazon (opens in a new tab)
The strongest case for Marxon Group 24M Marine Battery Dual Purpose 12V 79Ah 715MCA 550CCA 150RC is dimensions are clearly listed for tray fitting.
Best for
- owners with a tight, measured tray
Why it made the shortlist
For owners with a tight, measured tray, this is one of the more relevant configurations in the shortlist. The documented setup centers on 12V 79Ah dual purpose, 550 CCA, 715 MCA, 150 RC, 10.24 x 6.61 x 8.19 in.
Its case starts with dimensions are clearly listed for tray fitting. Its 12V 79Ah dual purpose specification sits at the lower end of the comparable range in this 5-product comparison. Treat the battery platform and included charger as part of the fit, not just the headline number.
The trade-off worth checking first is lowest capacity in this group at only 79Ah. Confirm whether the battery and charger are included with the exact package. Check platform compatibility and published runtime against the area or workload you need to cover.
Key dimensions & specs
- 12V 79Ah dual purpose
- 550 CCA, 715 MCA, 150 RC
- 10.24 x 6.61 x 8.19 in
Pros
- Dimensions are clearly listed for tray fitting
- 550 CCA starts most engines in cold weather
- Reserve capacity of 150 minutes is listed
Cons
- Lowest capacity in this group at only 79Ah
- Costs $1.00 more than a bigger Mighty Max
Best for Cranking Power5 of 5
Interstate Batteries Marine/RV Battery 12V 70Ah 750CCA Group 24 AGM on Amazon (opens in a new tab)
Interstate Batteries Marine/RV Battery 12V 70Ah 750CCA Group 24 AGM is the better fit when cold climate starting plus light house loads.
Best for
- cold climate starting plus light house loads
Why it made the shortlist
The intended use case is cold climate starting plus light house loads. The documented setup centers on 12V 70Ah AGM, 750 CCA, pure lead AGM.
What separates it on paper is 750 CCA is the highest cranking power here. Its 12V 70Ah AGM specification sits at the lower end of the comparable range in this 5-product comparison. Treat the battery platform and included charger as part of the fit, not just the headline number.
Before committing, account for costs $59.96 more than the Mighty Max 24M. Confirm whether the battery and charger are included with the exact package. Check platform compatibility and published runtime against the area or workload you need to cover.
Key dimensions & specs
- 12V 70Ah AGM
- 750 CCA
- Pure lead AGM
Pros
- 750 CCA is the highest cranking power here
- Pure lead design aims for longer life
- Sealed AGM design is maintenance free for owners
Cons
- Costs $59.96 more than the Mighty Max 24M
- Only 70Ah, the smallest house capacity
How We Built This Shortlist
Each pick was assessed across 4 criteria weighted for real-world use.
- Usable energy
- We compared lithium's near full discharge to AGM's roughly 50 percent safe depth of discharge.
- Cranking versus deep cycle
- We separated CCA and MCA starting figures from amp hour house capacity.
- Case fit
- We checked listed dimensions against the roughly 10 inch Group 24 footprint.
- Cost per usable amp hour
- We divided price by realistic usable capacity rather than nominal amp hours.
What Matters Before You Choose a Group 24 RV Battery
Key buying criteria so you get the right fit the first time.
Usable versus nominal capacity
A 90Ah AGM should only be discharged about 50 percent, giving roughly 45Ah, while a 100Ah lithium can use close to all of its capacity. Draining AGM deeper shortens its life sharply. Check the chemistry and divide accordingly.
CCA versus deep cycle rating
CCA measures cold cranking burst, while amp hours measure stamina. A battery with 750 CCA may have only 70Ah to give. Read both numbers on the listing and decide which job matters.
Group 24 vs 24M sizing
Group 24 and 24M are close but not identical, and 24M is the marine version with different terminals. A battery that is a half inch too long will not fit a tray. Compare the listed length, width and height to your tray.
Lithium cold charging
LiFePO4 cells can be damaged if charged below freezing, so many include low temperature cutoffs. The Litime lists such a cutoff. Check the listing for a charge temperature threshold if you winter camp.
Charger compatibility
Lithium needs a charger profile around 14.2V to 14.6V, and an old lead acid converter may undercharge. AGM is happy with standard converters. Check your converter's lithium mode before buying.
Match a Group 24 RV Battery to Your RV
By Primary Job
| Your situation | Recommended pick | Why |
|---|---|---|
| Pure house bank, no engine start | SUPER EMPOWER 100Ah | Cheapest 100Ah lithium |
| Large house bank from scratch | Litime Group 24 Pair | 200Ah in two batteries with app |
| One battery to crank and run | Mighty Max 24M | 90Ah plus 550 CCA |
| Cold weather engine starting | Interstate 24 AGM | 750 CCA |
Scroll sideways to see every column.
By Budget
| Budget | Recommended pick |
|---|---|
| $170 to $200 | SUPER EMPOWER 100Ah or Mighty Max 24M |
| $200 to $260 | Marxon 24M or Interstate 24 AGM |
| $610 to $620 | Litime Group 24 Pair |
Lithium vs AGM
- Lithium
- About 100Ah usable in a 21.6 lb case, but no cranking. The Litime Group 24 Pair and SUPER EMPOWER 100Ah are the picks.
- AGM
- Cranks and runs loads but only half the nominal capacity is usable. The Mighty Max 24M, Marxon 24M and Interstate 24 AGM are in this group.
Default to lithium for house power and AGM only where one battery must also start an engine.
By Budget Per Battery
| Best pick | Recommended pick |
|---|---|
| Under $200 | SUPER EMPOWER 100Ah |
| Around $200 with cranking | Mighty Max 24M |
| Around $260 for cold starts | Interstate 24 AGM |
| Pair for $612.85 | Litime Group 24 Pair |
For Small Trailer Tongue Boxes Specifically
- Look for
- Listed dimensions near 10.24 inches long and a weight under 25 lb.
- In this comparison
- The SUPER EMPOWER 100Ah at 21.6 lb and 10.24 inches wide is easiest to handle, and the Marxon 24M lists 10.24 inch length for tight trays.
When to Spend More
- Spend more if
- Spend more on the Litime Group 24 Pair if you will install two batteries, since $306.43 each buys Bluetooth monitoring and low temperature protection beyond the SUPER EMPOWER.
- Save if
- Save with the SUPER EMPOWER 100Ah at $179.99, which is $20.00 under the Mighty Max 24M and gives about twice the usable energy.
Before You Bring One Home
Can a lithium Group 24 battery start my engine?
These drop in lithium models are listed for deep cycle use. Use a dual purpose AGM if one battery must also crank.
What is the difference between Group 24 and 24M?
24M is the marine version with different terminals. Check dimensions and terminal layout before buying.
How many Group 24 batteries do I need?
Add up daily amp hours, then divide by usable capacity per battery. A 100Ah lithium covers roughly twice what an AGM of the same rating does.
Is Group 24 big enough for an RV?
For small trailers and van setups, yes. Larger rigs usually use Group 27 or 31 for more capacity.
Bottom Line
Best overall: Litime 2 Packs 12V 100Ah LiFePO4 Battery — best overall pick in this roundup. See the full verdicts above for every pick, with pros, cons and who each one suits.
Browse all group 24 rv battery on Amazon — Prime-eligible options with current pricing.