Deep Cycle Marine Battery

Best 36 Volt Lithium Marine and RV Battery

Marine and RV 36-volt lithium batteries are used to store large amounts of energy and release it when needed. Shifting from 12V to 36V increases energy efficiency while keeping the required wiring at acceptable thickness.

Also, moving from lead-acid to lithium batteries decreases the weight of the battery pack, increases the number of charging/discharging cycles, increases the battery energy efficiency, etc.

Published: July 21, 2021.

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Single 36-Volt Lithium Battery vs Three 12-Volt Lithium Batteries Connected in Series

Marine, automotive, RV and light-industry lithium batteries are almost exclusively Lithium Iron Phosphate (LiFePO4) batteries, featuring a nominal voltage of 3.2 volts and standard discharge current of ~1C and surge current ~2C - of course, these values vary from the battery to the battery.

In order to make these batteries as safe as possible, lithium batteries come with the built-in Battery Management System (BMS) that protects the battery from unwanted events like short-circuit, overcharge, over-discharge, overcurrent, overheating, etc.

Also, BMS ensures cell-balancing and ensures proper operation when the batteries are connected in series and/or parallel - if allowed by the battery manufacturer!

In order to achieve 36-volts, one may use a single 36-volt lithium battery or three 12-volt lithium batteries connected in series.

If You need a 36-volt lithium battery, it is much simpler to have a single battery of the required capacity and to charge it using a single 36-volt lithium battery charger.

The following comparison chart lists some of the most popular 36-volt lithium batteries suitable for marine, RV, automotive, and even light-industrial use:

Model Battery Type
Cell Type
Group Size Capacity (Ah)
RC (min)
Discharge
Currents
Parallel Conn.
Series Conn.
Weight (lbs/kg)
Dakota Lithium 36V63Ah Deep Cycle
LiFePO4
4D/6D 63
~150
60A cont.
100A 10s
? 59 lbs; 26.8 kg
Fly Power 36V40Ah Deep Cycle
LiFePO4
95R 40
96
40A cont.
80A 3-5s
Yes -
Fly Power 36V60Ah Deep Cycle
LiFePO4
4D/6D 60
144
60A cont.
120A 3-5s
Yes -
Fly Power 36V80Ah Deep Cycle
LiFePO4
4D/6D 80
192
80A cont.
160A 3-5s
Yes -
Fly Power 36V100Ah Deep Cycle
LiFePO4
4D/6D 100
240
100A cont.
200A 3-5s
Yes -
Fly Power 36V120Ah Deep Cycle
LiFePO4
- 120
288
120A cont.
240A 3-5s
Yes -
GreenLiFE GL36V40 Deep Cycle
LiFePO4
31 40
96
50A cont. Yes 31.3 lbs; 14.2 kg
Kepworth 36V40Ah Deep Cycle
LiFePO4
95R 40
96
32-40A cont. P:?
S: up to 2
35.2 lbs; 16.0 kg
Kepworth 36V60Ah Deep Cycle
LiFePO4
4D/6D 60
144
48-60A cont. P:?
S: up to 2
46.2 lbs; 20.9 kg
Kepworth 36V80Ah Deep Cycle
LiFePO4
4D/6D 80
192
 64-80A cont. P:?
S: up to 2
56.5 lbs; 25.6 kg
Kepworth 36V100Ah Deep Cycle
LiFePO4
4D/6D 100
240
 80-100A cont. P:?
S: up to 2
69.7 lbs; 31.6 kg
Kepworth 36V120Ah Deep Cycle
LiFePO4
4D/6D 120
288
 96-120A cont. P:?
S: up to 2
82.9 lbs; 37.6 kg
MoseWorth 36V100Ah Deep Cycle
LiFePO4
4D/6D 100
240
- Not recommended ?
Scream Power 36V40Ah Deep Cycle
LiFePO4
95R 40
96
40A cont.
80A surge (s?)
? 28.7 lbs; 13 kg
Scream Power 36V80Ah Deep Cycle
LiFePO4
4D/6D 80
192
80A cont.
160A surge (s?)
? 57.2 lbs; 25.9 kg
Scream Power 36V100Ah Deep Cycle
LiFePO4
4D/6D 100
240
 100A cont.
200A surge (s?)
? 70.5 lbs; 31.94 kg
Scream Power 36V120Ah Deep Cycle
LiFePO4
- 120
288
120A cont.
240A surge (s?)
? 83.8 lbs; 39.96 kg

Note: Amazon affiliate links ('Model' column) open in the new windows, feel free to check them for the most up-to-date prices and offers. Also, we have tried to verify every single bit of information in this chart, but things may change over time, especially with the introduction of new battery (sub)models.

Most 36-volt lithium batteries are large batteries often labeled as 4D batteries, but featuring actual dimensions of somewhat larger BCI Group 6D batteries.

Also, 36-volt lithium batteries are not as common as 12-volt lithium batteries - 36-volt lithium batteries are newer on the market and they are not offered by as many brands as 12-volt lithium batteries.

The following comparison chart lists some of the most popular 12-volt lithium batteries suitable for marine, RV, automotive, and light-industrial use:

Model Battery Type
Cell Type
Group Size Capacity (Ah)
RC (min)
Discharge
Currents
Parallel Conn.
Series Conn.
Weight (lbs/kg)
AIMS Power LFP12V50A Deep Cycle
LiFePO4
- 50
120
50A cont.
100A 10s
? 17.75 lbs; 8.04 kg
AIMS Power LFP12V100A Deep Cycle
LiFePO4
31 100
240
100A cont.
200A 10s
? 30.2 lbs; 13.7 kg
AIMS Power LFP12V200A Deep Cycle
LiFePO4
4D (6D) 200
480
160A cont.
350A 10s
? 77 lbs; 34.9 kg
AIMS Power LFP12V50B Deep Cycle
LiFePO4
- 50
120
50A cont.
100A 10s
P: up to 4
S: up to 4
15.5 lbs; 7.0 kg
AIMS Power LFP12V100B Deep Cycle
LiFePO4
31 100
240
100A cont.
200A 10s
P: up to 4
S: up to 4
28.5 lbs; 12.9 kg
AIMS Power LFP12V200B Deep Cycle
LiFePO4
4D (6D) 200
480
200A cont.
400A 10s
P: up to 4
S: up to 4
62 lbs; 28.1 kg
Ampere 12V 50Ah Plus Deep Cycle
LiFePO4
- 50
120
50A cont.
100A 5s
P: no limits (4?)
S: up to 4
14.3 lbs; 6.5 kg
Ampere 12V 200Ah Deep Cycle
LiFePO4
4D (6D)  200
480
100A cont.
280A 5s
P: no limits (4?)
S: up to 4
46.07 lbs; 20.9 kg
Ampere 12V 200Ah Plus Deep Cycle
LiFePO4
4D (6D)  200
480
200A cont.
400A 5s
P: up to 4
S: up to 4
52.25 lbs; 23.67 kg
Ampere 12V 300Ah Plus Deep Cycle
LiFePO4
4D (6D) 300
720
200A cont.
400A 5s
P: no limits (4?)
S: up to 4
69 lbs; 31.3 kg
Battle Born BB5012 Deep Cycle
LiFePO4
- 50
120
60A cont.
100A 30s
P: yes
S: up to 4
17.6 lbs; 8.0 kg
Battle Born BB10012 Deep Cycle
LiFePO4
31 100
240
100A cont.
200A 30s
P: yes
S: up to 4
29 lbs; 13.2 kg
Battle Born BBGC2 Deep Cycle
LiFePO4
GC2 100
240
100A cont.
200A 30s
P: yes
S: up to 4
31 lbs; 14 kg
Bioenno Power BLF-12100WS Deep Cycle
LiFePO4
31 100
240
100A cont.
200A 5s
(not recommended) 28.1 lbs; 12.8 kg
Eastup 1250750 Dual Purpose
LiFePO4
34R/97R 50
120
750 CCA
930 MCA
? 15.43 lbs;  ~7.0 kg
Eastup 12751000 Dual Purpose
LiFePO4
94R 75
180
1000 CCA ? 17 lbs; ~7.7 kg
ExpertPower EP1250 Deep Cycle
LiFePO4
- 50
120
50A cont.
100A 10s
? 13 lbs; 5.9 kg
ExpertPower EP12100 Deep Cycle
LiFePO4
31 100
240
100A cont.
200A 2s
? 22.6 lbs; 10.3 kg
ExpertPower EP12200 Deep Cycle
LiFePO4
4D (6D) 200
480
150A cont.
200A 3s
? 48.3 lbs; 21.9 kg
GLI GLIBATT12050 Deep Cycle
LiFePO4
26 50
120
50A cont.
500A 5s(?)
P: yes
S: up to 4
15 lbs; 6.8 kg
GreenLiFE GL50-50AH Deep Cycle
LiFePO4
21 50
120
50A cont. Yes 15 lbs;  6.8 kg
GreenLiFE GL80-80AH Deep Cycle
LiFePO4
27 80
190
80A cont. Yes 28 lbs; 12.8 kg
GreenLiFE GL100-100AH Deep Cycle
LiFePO4
31 100
240
100 cont.
1000A 5s
Yes 31 lbs;  14 kg
GreenLiFE GL260-260AH Deep Cycle
LiFePO4
8D 260
620
100 cont.
2600A 5s.
Yes 80 lbs; 36.24 kg
JITA 12V100Ah Deep Cycle
LiFePO4
31 100
240
200A cont.
400A 5s
P: up to 4
S: up to 4
23.8 lbs; 10.8 kg
JITA 12V200Ah Deep Cycle
LiFePO4
4D (6D) 200
480
200A cont.
400A 5s
P: up to 4
S: up to 2
48.9 lbs; 22.2 kg
JITA 12V300Ah Deep Cycle
LiFePO4
4D (6D) 300
720
200A cont.
400A 5s
P: up to 4
S: up to 4
68.3 lbs; 31.0 kg
Kunmo LF-12100 Deep Cycle
LiFePO4
75 100
240
100 cont. ? 25.3 lbs; 11.5 kg
Lossigy 12V100Ah Deep Cycle
LiFePO4
- 100
240
50A cont. P: up to 10
S: up to 4
23.8 lbs; 10.8 kg
Lossigy 12V200Ah Deep Cycle
LiFePO4
4D 200
480
100A cont. P: no limit (10?)
S: up to 4
46 lbs; 20.9 kg
Lossigy 12V300Ah Deep Cycle
LiFePO4
4D (6D) 300
720
200A cont. P: up to 10
S: up to 4
72 lbs; 32.6 kg
Mighty Max ML100-12Li Deep Cycle
LiFePO4
30H 100
240
100A cont.
200A 15s
P: Up to 4
S: Not Allowed
29.54 lbs; 13.4 kg
Renogy RNG-BATT-LFP12-50 Deep Cycle
LiFePO4
- 50
120
50A cont. P: Yes
S: Not Allowed
14.77 lbs;  6.7 kg
Renogy RNG-BATT-LFP12-100 Deep Cycle
LiFePO4
- 100
240
100A cont. P: Yes
S: Not Allowed
28.1 lbs;  12.73 kg
Renogy RBT100LFP12S-G1 Deep Cycle
LiFePO4
- 100
240
100A cont. P: Yes
S: Not Allowed
26 lbs; 11.8 kg
Renogy RNG-BATT-LFP12-170 Deep Cycle
LiFePO4
- 170
408
125A cont. P: Yes
S: Not Allowed
46.3 lbs; 20.97 kg
VMAXTANKS LFP27-12100 Deep Cycle
LiFePO4
27 100
240
125A cont.
350A 3s
P: up to 4
S: up to 4
25.3 lbs; 11.5 kg
VMAXTANKS LFPU1-1245 Deep Cycle
LiFePO4
U1 45
108
45A con.
100A 3s
P: up to 4
S: up to 4
10.8 lbs; 4.9 kg
VMAXTANKS VPG12C-50Li Deep Cycle
LiFePO4
U1 50
120
50A cont.
100A 5s
150A 3s
P: Up to 2
S: Not Allowed
12 lbs; 5.5 kg
Waterblade LFP 100-12.8 Deep Cycle
LiFePO4
31 100
240
80A cont.
400A 1s
? 29 lbs; 13.2 kg
Weize FPLI-12100AH Deep Cycle
LiFePO4
31 100
240
50A
100A 3s
P: up to 4
S: up to 2 (4?)
26.4 lbs; 12.0 kg

Note: Amazon affiliate links ('Model' column) open in the new windows, feel free to check them for the most up-to-date prices and offers. Also, we have tried to verify every single bit of information in this chart, but things may change over time, especially with the introduction of new battery (sub)models.

As one can see, 12-volt lithium batteries are more numerous, with their manufacturers providing much more details than the manufacturers of 36-volt lithium batteries, which may be very important when creating custom lithium battery packs.

Note: If a single 36-volt lithium battery fits your needs, consider purchasing that battery with the battery charger from the same brand. However, if You need a custom 36-volt battery pack, personally, 12-volt lithium batteries are much more mature units than 36-volts lithium batteries. Just my 2c!

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When creating battery packs by connecting several batteries in series and/or parallel, be sure that their BMSs support such connections, be sure to always use the very same batteries from the same brand and preferably from the same batch, use wires thick enough and connect the batteries as recommended by the manufacturer.

Note: connecting lead-acid batteries in series/parallel is much simpler in terms of planning, but lithium batteries due to their built-in Battery Management Systems are much more sensitive. If unsure, always, but really always check the battery documentation and if required, contact the battery manufacturer.


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Long Story Short: 36-volt lithium batteries are becoming more and more popular in marine, RV, automotive, off-the-grid, and industrial applications. Such batteries are able to store large amounts of energy, they cycle much better than lead-acid batteries, they are more energy-efficient, much lighter, etc.

Also, lithium batteries are more expensive than lead-acid batteries, but since they support 8-10x more charging/discharging cycles, in the long run, they actually save money.

Lithium Iron Phosphate (LiFePO4) chemistry is rather safe chemistry, especially when combined with good BMS, but, whatever You do, do according to the manufacturer's recommendations - if mistreated, these batteries may also overheat, catch fire or even explode ...

Stay safe ...



Amazon Search:

36 Volt Lithium Battery

36 Volt Lithium Battery Charger

12 Volt Lithium Battery

Note: Amazon links open in the new windows, feel free to check them for the most up-to-date offers and prices.

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