Lithium ion battery BOS LE300 4 pack 102Ah / 1312Wh

Lithium ion battery BOS LE300 4 pack 102Ah / 1312Wh

Lithium ion battery BOS LE300 4 pack 102Ah / 1312Wh

Lithium extension battery, 12VDC, total capacity 1312Wh (102Ah), integrated BMS for lithium battery and for automatic hybrid regulation in combination with lead acid battery, compatible to any 12V lead acid battery system, requires an external lead acid battery charge controller, including 2120mm cable, pre-wired and ready to be installed.

Item Code 12000704
Manufacturer BOS
Product Weight 12.60 kg
Packed Weight 12.60 kg
Dimensions 175 x 229 x 268 mm (LxWxH)
Shipping Parcel Post
Regular Price €1,884.20 Special Price €1,695.78 €1,413.15

BOS LE300 Lithium Extension Battery is a fully scalable solution to enhance performance and add capacity to lead acid batteries in solar and any other kind of energy storage systems. It comes in a robust housing and can be used with new or existing 12 V lead acid batteries. The intelligent technology allows multiple LE modules to be stacked in parallel to meet your specific system specs.

Like in all BOS AG Hybrid battery systems, the lithium battery takes most of the charging cycles while the lead acid battery provides inexpensive backup capacity. The lead acid battery is charged with higher priority, while the lithium battery takes all surplus energy. This process helps to increase the lead acid battery lifetime.

The integrated battery management system recognizes the lead acid battery voltage and automatically starts to support the lead acid battery. Lithium battery powers most of the loads, while lead acid is kept at floating point most of the time. However, bigger loads are supported by lead acid and the lithium battery simultaneously, which results smaller currents for each battery, reducing the strain on both the batteries.

Applications include: Lead-Acid batteries back up, caravan/automobiles, sailing, solar home systems, teleocommunication towers.


  • Flexible capacities by simply connecting several packs 
  • State of the art LiFePO4 batteries 
  • Retrofitting & extension of already installed systems without change in wiring or other components 
  • No additional controller needed, simply connect directly to the lead acid batteries 
  • Lead acid battery is charged with higher priority, lithium battery is discharged first The system recognizes the lead acid battery voltage and automatically starts to support the lead acid battery with a maximum current of 12.5 A per unit. Bigger loads get supplied by the lead acid and the lithium battery in parallel, resulting in smaller currents for each battery. 
  • Lithium performance and lead acid cost advantages are combined 
  • Plug & Play > simply connect two cables 
  • Robust housing with variable fixing possibilities 
  • Integrated heating for low temperature charging   
  • Made in Germany

Please note: This item can only be shipped with road cargo and there are currently longer delivery and lead times. 

Item Code 12000704

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All products are shipped from Germany with FedEx UPS or GLS (Parcel Post) and when in stock, they are delivered in most European destinations around 3-5 business days after ordering. If a product is not in stock an extra week may be needed for delivery. Larger items and batteries can only be shipped with road transport (Road Cargo), additional charges may be applied. Please note that certain batteries, and especially the Sonnenschein batteries, have longer lead times. The SOLARA products are currently shipped only within the EU. You may see the shipping rate after adding an item to the cart, please read more in our shipping section here >>  


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If you change your mind about your purchase you can return us the product to the warehouse in Germany and get a refund or exchange it for up to 14 or 30 days from the day you received it, provided that it is still in its new, unopened and unused conditon and with its original packing. Buyers pay for the return shipping costs. Please contact us before so we can give an RMA number and the return address. We have a really very low, approching zero rate of returns, result of the high quality of the products we offer.

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