The passionate sailor Peter Reinmann extended his lead acid energy storage of his 9.30 meter long sailing catamaran with two BOS LiFePO4 Lithium modules. Peter is thus able to operate all the on-board electronics such as navigation, radio, light, refrigerator and gas heating. Because there was no room under the bench seat for a larger supply battery, a LE300 hybrid system was the perfect solution without loosing too much space. Now he is able to enjoy longer trips on the water without returning for recharge. A freedom that he no longer wants to miss.
Lithium Extension Battery
BOS Lithium Extension Battery is a fully scalable solution to enhance performance and upgrade capacity of lead acid batteries in solar or any applications with storage needs. They can be used with new or existing 12 V lead acid batteries. Easy to install, by simply connecting the LE300 in parallel to Lead acid batteries. Capacity is very flexible, can be increase by just stacking multiple LE300 in parallel until you meet your system’s needs!
Works with any Lead acid battery and any application
BOS Lithium Extension Batteries can be used wherever a classic lead acid battery needs to be extended. The scope and application of the LE300 is such that, our customers often inspire us with new ideas and possible application areas. Right from Solar Home systems in Africa to Caravans and Boats in Europe, LE300 has touched every kind of storage application you can ever think of!
Solar home systems
Lithium for cycling.
Lead acid for basic load.
In pure lead acid systems, batteries often fail within one to three years, as batteries get damaged by continuous operation at low state of charge. Pure lithium systems perform way better and show longer lifetimes but are very expensive. Initial investment costs for hybrid systems are close to the costs of pure lead acid systems and approx. 50% lower than pure lithium systems. As costs per stored kWh are around 60% lower in hybrid systems than in lead acid systems, the hybrid system becomes the most cost effective option already in the first three years.
Charging & Discharging Cycle
With the LE hook up, the Lead Acid Battery is kept fully charged, while the cycle-resistant Lithium Battery takes on most charging cycles and is preferentially discharged under load. The capacity and the performance of both Batteries are used optimally, so you can look forward to a better performance and a longer life span of your Batteries
Longer Battery Lifetime. At Low Costs
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.
Robust housing for automobile. Insured against bad terrains
An elegant design and robust housing keeps the lithium batteries safe, even when you are driving off-road or bad roads. Thanks to an optimised sizing and variable fixing possibilities, the modules fits even in smallest of the corners. Each module is E24 certified which allows them to be installed in automobiles as well.
Easy to sclae up. All your needs are covered
LE modules can be easily staged together to meet your individual energy storage needs. Up to 24 (7.8kWh Lithium capacity) LEs can be stacked together, on top of your present or new lead acid battery. As mentioned, all your needs are covered!
Retrofit or extend your lead acid battery. Hybrid technology
BOS Lithium Extension Batteries can be connected to any new or existing 12 V lead acid battery. Thanks to the intelligent design, no additional charge controller or electrical wiring changes are needed.
Low temperature resitance. Works with any climate
All LE modules have an integrated heater, so the lithium batteries are protected against cold temperatures and perform without any energy losses. So installing LE in Alps or Himalaya is not at all an issue!
Plug & Play. Ease of installation
With the plug and play design, LEs are easy to install and operate. They simply need to be connected with plus (+) and minus (-) terminals of the lead acid battery. Installing Lithium batteries was never this easy.
Exclusive global partner for caravans.
Exclusive partner for boats and yachts in Germany.
Capacity: 25.6 Ah | 328 Wh
System voltage: 12 VDC
Battery: LiFePO4 Lithium
Weight: 3.4 kg
BOS Lithium Extension Batteries
are the main component of the new innovative hybrid storage battery for Hymer caravans. Hymer AG is one of the largest manufacturer of motorhomes and caravans in Europe. The HYMER-smart-battery-system will
offer more freedom of energy
integrated battery heating,
Visit us at the CMT The holiday exhibition in Stuttgart from 11. – 19. January.
Together with HYMER Original Teile + Zubehör we are pleased to present you the HYMER SMART BATTERY system in two different sizes. The innovative lithium/lead acid battery system equips all Hymer caravans with more power and offers more freedom for your travels.
See for yourself in Hall 1 Stand 1C12. We look forward to seeing you there.
Until Sunday 26.01. the whole world of water sports can be admired at boot in Düsseldorf and our LE300 Lithium Extension Battery will be part of it.
Together with our partner Ferropilot, we present our LE300 Lithium Extension Battery at the booth of Ferropilot a divison of ELNA. Expand very easily your existing lead acid battery with a lighter and safe LE300 Lithium Extension Battery for more capacity and better performance.
Convince yourself and visit us at booth 10 – C46. Our team is exited to meeting you!