Best RV Battery Banks

How to size a LiFePO4 battery bank for your RV, which batteries to buy, and how many you actually need.

How Many Batteries Does Your RV Need?

The right battery bank size depends on what you run, for how long, and whether you have solar to recharge during the day. Here's a quick guide by RV type:

RV Type Typical Daily Use Recommended Bank Covers
Weekend Camper / Trailer 500–1,000 Wh/day 1× 100Ah 12V (1,280 Wh) Lights, phone charging, water pump, small fan
Travel Trailer / 5th Wheel 1,500–3,000 Wh/day 2× 100Ah 12V (2,560 Wh) Above + TV, laptop, 12V fridge, LED lights all evening
Full-Time RV / Class A 3,000–5,000 Wh/day 4× 100Ah 12V (5,120 Wh) or 2× 200Ah Above + residential fridge, microwave, coffee maker, hair dryer
Off-Grid / Boondocking 2,000–4,000 Wh/day 3–4× 100Ah 12V + 400W+ solar Extended dry camping with no shore power, full comfort
Quick formula: Add up your daily watt-hours, then divide by battery voltage (usually 12.8V for LiFePO4). For example: 2,500 Wh ÷ 12.8V = 195Ah → two 100Ah batteries. Want an exact number? Use our System Calculator — add your specific appliances and it calculates everything.

Why LiFePO4 Is the Best RV Battery Chemistry

Most RVs come with Group 24 or Group 27 lead-acid batteries. Upgrading to LiFePO4 is the single biggest improvement you can make to your RV electrical system:

LiFePO4 Advantages for RV
  • 50% lighter – a 100Ah LiFePO4 weighs ~26 lbs vs ~65 lbs for AGM
  • 100% usable capacity – use the full 100Ah vs only 50Ah from AGM (50% DoD limit)
  • 10x cycle life – 3,000–5,000 cycles vs 300–500 for AGM
  • Drop-in replacement – same Group 24/27/31 sizes, fits existing battery compartment
  • Fast charging – accepts full charge current until nearly full, charges 5x faster
Things to Know Before Upgrading
  • Converter/charger – your RV converter must have a LiFePO4 charge profile (14.4V bulk, 13.6V float). Most modern Progressive Dynamics converters do; older ones may need a $50–$100 replacement.
  • Cold weather charging – LiFePO4 cannot charge below 32°F (0°C). Get a battery with a built-in heater or low-temp cutoff BMS if you camp in winter.
  • Solar charge controller – set to LiFePO4 profile. Most MPPT controllers (Victron, Renogy, EPEver) support this.

Recommended RV Batteries

All batteries below are drop-in LiFePO4 replacements with built-in BMS. Sorted by capacity.

Battery Voltage Capacity Weight Warranty Bluetooth Heater
Battle Born
BB10012 		12.80V 1,280 Wh
100.00Ah		 30 lbs 10 yr Price
Battle Born
BB5024 50Ah 24V 		25.60V 1,280 Wh
50.00Ah		 29 lbs 10 yr Price
Battle Born
BB5024H 50Ah 24V Heated 		25.60V 1,280 Wh
50.00Ah		 31 lbs 10 yr Price
RELiON
RB100 		12.80V 1,280 Wh
100.00Ah		 31 lbs 10 yr Price
Renogy
RBT100LFP12-G1 		12.80V 1,280 Wh
100.00Ah		 26 lbs 5 yr Price
Litime
12V 200Ah Plus Self-Heating LiFePO4 		12.80V 2,560 Wh
200.00Ah		 44 lbs 5 yr Price
LiTime
24V 100Ah LiFePO4 Lithium Battery 		25.60V 2,560 Wh
100.00Ah		 46 lbs 10 yr Price
Renogy
RBT200LFP12-G1 		12.80V 2,560 Wh
200.00Ah		 51 lbs 5 yr Price
Battle Born
270Ah 12V Heated 		12.00V 3,456 Wh
270.00Ah		 — 10 yr Price
ECO-WORTHY
48V 100Ah Server Rack 		51.20V 5,120 Wh
100.00Ah		 93 lbs 5 yr Price
LiTime
24V 230Ah Smart Self-Heating LiFePO4 Battery 		25.60V 5,888 Wh
230.00Ah		 — 5 yr Price

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Looking for the full comparison with cycle life, specs, and DIY options? See our complete LiFePO4 battery comparison.

RV Battery FAQ

It depends on your daily energy use. A weekend camper running lights, a fan, and phone chargers uses about 500–1,000 Wh/day and needs one 100Ah 12V battery. A full-time RVer running a residential fridge, TV, laptop, and more uses 3,000–5,000 Wh/day and needs 3–4 batteries.

The easiest way to find out: list your appliances in our System Calculator — it adds up the watt-hours and tells you exactly how many batteries you need.

Yes. LiFePO4 batteries come in the same Group 24, Group 27, and Group 31 sizes as lead-acid. They're a direct drop-in replacement. The one thing you need to check is your RV's converter/charger — it must support a lithium charge profile (14.4V absorption, 13.6V float). Most RV converters made after 2018 do. If yours doesn't, a replacement converter costs $50–$100.

You'll also want to update your solar charge controller profile to "LiFePO4" if you have rooftop solar.

For comfortable boondocking (dry camping without hookups), plan for at least 2–3 days of autonomy. If you use 2,000 Wh/day, that's 4,000–6,000 Wh of battery storage — about 3–4 LiFePO4 100Ah batteries.

Pair your battery bank with 400W+ of rooftop solar to recharge during the day. With enough solar, you can boondock indefinitely without running a generator.

Yes, especially if you boondock or camp without hookups regularly. Here's the math: a 100Ah AGM battery gives you about 50Ah of usable capacity (50% DoD), weighs 65 lbs, and lasts ~400 cycles. A 100Ah LiFePO4 gives you 100Ah usable, weighs 26 lbs, and lasts 3,000+ cycles.

Over its lifetime, a single LiFePO4 battery replaces 7–8 AGM batteries. At ~$250–$350 for LiFePO4 vs ~$200 for AGM, the cost per cycle is dramatically lower — and you save 40+ lbs per battery.

Yes. Your RV's alternator charges the house batteries through a battery isolator or DC-DC charger while driving. With a DC-DC charger (recommended for LiFePO4), your batteries can charge at 30–60A while you drive — a few hours of driving can fully recharge a 100Ah battery.

Note: if your RV has a basic isolator (solenoid), consider upgrading to a DC-DC charger like the Renogy DCC50S or Victron Orion-Tr. These provide the proper charge profile for lithium batteries and protect your alternator from overcurrent.

Not sure what size battery bank your RV needs?

Add your specific appliances and our calculator tells you exactly how many batteries and watts of solar you need.

Size My RV Battery Bank