LE300 Lithium Batteriespeicher, Smart Battery System, LiFePO4




The BOS LE300 smart battery system is a fully scalable lithium extension solution to add capacity to lead-acid batteries. Its intelligent battery management system allows an easy Plug & Play instalation and prolongs the lifespan of both batteries by up to 10 years.


Technical specifications

System voltage

12 VDC

Norminal voltage

12.8 VDC

Voltage range

11 -15 VDC

Battery packs used in LE300

IFpR/26/65 [8p/4s] E/-20NA/95 LiFePO4 rechargeable battery

Nominal lithium capacity

28 Ah / 358 Wh

Usable lithium capacity

90% (25.2 Ah / 322 Wh)

Numbers of cycles at room temperature

>3000 complete cycles

Continuous charging current

Max. 12.5 A between 5 and 40°C, at higher and lower temperatures current is limited.

Battery efficiency

> 90%

Housing dimensions

175 x 229 x 67 cm


3.4 kg

Connection terminals

RAST 5/mini module 4 pin/communication
interface/external display

Recommended wire size

1.5 – 4 mm²

Ambient temp. (operation & warehousing)

-20 – 50 °C ambient temperature with
maximum battery life at 15 – 25 °C.
Warehousing temperature 10 – 30 °C.

Low and high temperature protection,
heating, charging & discharging

Temp. sensor prevents lithium battery charge under -5°C or above 55°C cell temp. Charging starts once cell temp. is higher than -5°C. Device has an integrated heating that is active between -20°C and 10°C cell temp. Discharge possible between -20°C and 60°C cell temp. At cell temp. below -20°C and over 60°C system is running in pure lead acid mode for higher battery lifetime.

Lithium cell balancing

Battery management inclusive balancer

Protection features

Overcurrent, overvoltage, short circuit, deep discharge, wrong polarity protection.

Operation mode/compatible
external batteries

Works in combination with any 12 V lead acid battery & lead acid charge controller.

Connection possibilities

Packs can be connected in parallel with each other (see exemplary parallel combination in the table below).

Max. parallel LE300s

In standard version, a maximum of 24
LE300 can be connected only in parallel, higher quantities possible after consulting BOS partner.

Note: Changes to the products and the above specifications are subject to change anytime without notice. Please contact [email protected] for more information.
LE300 Lithium Batteriespeicher, Smart Battery System, LiFePO4


Qt. of packs connected in parallel



Total nominal voltage

12.8 VDC

12.8 VDC

Total lithium capacity

168 Ah/2,15 kWh

56 Ah/ 716 Wh

Continuous charging/discharging current

Max. 75 A

Max. 25 A

Recommended lead acid capacity (not included)

Min 40 Ah

Min 20 Ah

Lithium Energy Storage, LE300 Lithium Batteriespeicher, Smart Battery System, LiFePO4
From 445 €