48V Lithium Batteries

 48V lithium batteries are Lithium Iron Phosphate (LiFePO4) batteries intended for systems requiring more power than it is suitable/practical to provide using 12V, 24V, or 36V.

Internally, 48V lithium batteries feature 16 (sixteen) 3.2 cells connected in series to provide a nominal voltage of 51.2 volts.

ampere time 48v 100ah w300px

48V Lithium Batteries Features and Specifications

While 48V can be obtained by connecting 4 (four) 12V lithium or 2 (two) 24V lithium batteries in series, a single 48V battery requires fewer wires and connections, simplifying things significantly.

48V lithium batteries have pros and cons similar to 12V, 24V, and 36V lithium batteries - when compared with the 48V lead-acid batteries (or battery packs), 48V lithium batteries support a much higher number of charging/discharging cycles (often 10x more), they don't suffer from the capacity loss when being drained with 0.5-1.0C or even stronger currents, they are much lighter (2-3x lighter; when being drained with strong currents, they are actually 3-5x lighter than the lead-acid batteries), etc.

Also, 48V lithium batteries cost more initially, but in the long run, when used in cycling applications, lithium batteries are actually cheaper, saving money, weight, time, effort...

In order to make them as safe as possible, 48V Lithium Iron Phosphate (LiFePO4) batteries feature built-in Battery Management Systems (BMS) that protect the batteries from undesired events like low/high voltage, low/high temperature, overcurrent protection, short-circuit protection, and similar.

But, unlike lead-acid batteries, 48V lithium batteries should not be connected in parallel and/or series, unless explicitly permitted by the battery manufacturers - if they do, the batteries must be connected as recommended by their manufacturer.

48V lithium batteries are used in off-the-grid applications, in 48V golf carts, in RV vehicles, boats, yachts, for camping, etc.

The following comparison chart lists some of the most popular 48V marine, golf cart, automotive, and light industrial lithium batteries with their most important features and specifications:

Model Battery Type
Cell Type
Group Size Capacity (Ah)
RC (min)
Discharge
Currents
Parallel Conn.
Series Conn.
Weight
Ampere Time 48V100Ah Deep Cycle
LiFePO4
- 100
240
100A cont.
280A 5s
Not supported 99.2 lbs; 44.9 kg
Fly Power 48V100Ah Deep Cycle
LiFePO4
- 100
240
100A cont.
200A 3-5s
Yes -
Go Battery 48V100Ah Deep Cycle
LiFePO4
- 100
240
120A cont.
300A surge (s?)
P: yes
S:?
91 lbs; 41.2 kg
GreenLiFE GL48V25 Deep Cycle
LiFePO4
31 25
60
40A cont. Yes 27.3 lbs; 12.4 kg
Kepworth 48V100Ah Deep Cycle
LiFePO4
- 100
240
80-100A cont. P:?
S: up to 2
81.4 lbs; 36.9 lbs
Lynx 48V100Ah Deep Cycle
LiFePO4
- 100
240
200A cont. Yes 89 lbs; 40.3 kg
Lynx 48V200Ah Deep Cycle
LiFePO4
- 200
480
400A cont. Yes 150 lbs; 68 kg
MoseWorth 48V100Ah Deep Cycle
LiFePO4
- 100
240
100A cont.
200A surge (s?)
Yes 81.4 lbs; 36.9 lbs
RELiON 48V30Ah Deep Cycle
LiFePO4
GC2 30
72
100A cont.
200A 15s
P: yes
S:?
34.4 lbs; 15.6 kg
Renogy 48V50Ah Deep Cycle
LiFePO4
- 50
120
50A cont. P: yes
S: no
60.8 lbs; 27.6 kg
Scream Power 48V80Ah Deep Cycle
LiFePO4
4D (6D) 80
192
80A cont. ? 77 lbs; 34.9 kg
Scream Power 48V100Ah Deep Cycle
LiFePO4
- 100
240
100A cont. ? 94.7 lbs; 42.9 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.

When choosing the right battery, choose according to your own needs and preferences.

48V Lithium Battery as RV House Battery

RV house battery (or battery pack) is the battery that is used to power various loads (tools, appliances, devices, gadgets, chargers, etc.) while the main engine is turned off and while the RV is disconnected from the mains power - very similar to boats and yachts with dual battery electric systems, where one battery is used as starting battery for the main engine (or engines) and another battery (or battery pack) is used for powering various loads on the boat/yacht like navigation lights, GPS, cabin lights, various fans, fridge, chargers, multimedia devices, etc.

For example: we have a 48V 500Ah lithium battery pack that is used as an RV house battery for powering an AC unit that draws on average 1500W via a 48V power inverter with 90% energy efficiency.

We want to know the minimum time that such battery can support such load.

That means that the battery output power is:

P(battery) = P(inverter) / 0.9 = 1667W

Also, that means that the battery current is:

I(battery) = P(battery) / U(battery) = 1667W / 48V = 34.8 Amps

Note: in this calculation, we have used nominal battery voltage (48V), although the actual voltage of the fully charged 48V lithium battery is 51.2V - the goal of this example is to calculate "worst case scenario" time.

Now that we know the required current, it is easy to calculate the time:

T = 500Ah / 34.8A = 14.3 hours

For short: the 48V 500Ah lithium battery is capable of powering 1500W load via a 48V 90% energy efficient power inverter for ~14 hours.

And no, such battery pack is not cheap, but if You cycle it regularly, after some time, it will be much cheaper than the similar lead-acid battery pack not only in terms of paid batteries but also in terms of easier maintenance, weight reduction (saved fuel!) and similar.


Note: 48V is a very serious voltage, so be very careful when working with such voltage - whatever You do, safety first...