BOS LE300 Instruction Manual

LE300
Installation & User Manual
BOS BALANCE OF STORAGE SYSTEMS AG / BEIM MÜHLBACH 3 / 89171 ILLERKIRCHBERG / GERMANY
PHONE: [phone] / MAIL: CONT[email protected] / WEB: WWW.BOS-AG.COM
LITHIUM EXTENSION BATTERY
EN
User Manual Version No. 98803201
Release date: August 2018; Revision 12

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TABLE OF CONTENTS
1 GENERAL INFORMATION
2 TECHNICAL SPECIFICATIONS
3 OVERVIEW
4 SYSTEM FUNCTIONS
5 INSTALLATION
6 COMMISSIONING
7 DISPLAY & OPERATION
8 TROUBLESHOOTING AND FAQ
9 MAINTENANCE
10 STORAGE
11 TRANSPORTATION
12 WARRANTY & LEGAL NOTES
13 RECYCLING INFORMATION
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Package Contents
• User manual
• Device LE300 Lithium Extension Battery Art. No. 12000001
• Power cable connector RAST 5 with 20 cm cable and 2x WAGO clamp
Art. No. 97904600
• Spare part fuse KFZ-Mini 20 A (1x) Art. No. 96915600
Optional accessories
• RS485 parallel connection cable Art. No. 97905000
• Parallel mechanic mounting kit (threaded bolt and nuts, for max. 6 LEs
in parallel) Art. No. 1200080

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1. GENERAL INFORMATION
Thank you for purchasing a high quality, German made product
from BOS Balance of Storage Systems AG. We worked according
to strict engineering standards in order to deliver valuable ener-
gy services for our customers. In case of technical problems or
comments of any kind, please contact the local distributor for
support.
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. They can be
used with new or existing 12 V lead acid batteries. Just stack
them in parallel to meet your specific system specs.
As all BOS AG hybrid battery systems, the LE300 Lithium Exten-
sion 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 and the LE300 takes
all surplus energy. This helps to increase the lead acid battery
life.
The system recognizes the lead acid battery voltage and auto-
matically starts to support the lead acid battery with a maxi-
mum current of 12.5 A per unit. Bigger loads get supplied by the
lead acid and the LE300 in parallel, resulting smaller currents
for the whole system.

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Safety instructions
• Please read and understand the whole user manual before installation and usage of
the LE300 Lithium Extension Battery.
• Only connect to 12 VDC batteries of the following types:
– Lead storage batteries with liquid electrolytes
– Sealed lead acid batteries – GEL or AGM
• Use the device only in combination with a lead acid battery and a lead acid charge
controller, do NOT connect loads or power sources directly to the lead acid battery nor to the
LE300 device.
• Lead acid batteries can generate explosive gases during operation. Never smoke, allow
flames or sparks near the battery. Make sure to keep sufficient ventilation around the
battery and read the lead acid battery user manual.
• Do NOT use with nickel cadmium batteries, nickel metal hydride batteries or other
battery types.
• Do NOT mix up the + (plus) and - (minus) poles of the battery.
• Do NOT connect anything to a damaged battery. It could heat up, catch fire or explode.
• Do NOT open the battery pack. Danger of short-circuiting. Opening the LE300 device voids
any and all warranty claims.
• Best operating temperature is between 15 and 20 °C. Higher temperatures shorten the
lifespan of the batteries. Do NOT place device in direct sunlight!
• Protect the LE300 against heat (e.g. prolonged sun exposure) and fire and from water.
Do NOT store or operate the LE300 near hot or flammable objects.
• Install this device step by step as written in this manual for best results.
• After installation, the device needs to be fully charged.
• Do NOT charge the device over an extended period, if the device is unused.
• After prolonged storage period, it may be necessary to charge and discharge the device
numerous times to achieve the full performance capability.
• Follow all safety precautions during installation of device & handling batteries.
• Improper handling of batteries may introduce a risk of battery explosion.
• Keep batteries away from children & animals.
• During handling of batteries no smoking or exposure to naked light & fire.
• Wear eye protection during installation process.
• When working with a battery and LE300, remove all personal metal items like watches, rings,
necklaces and bracelets. Metal items in contact with the battery terminals might cause a
short circuit with a very high electric current, which may heat up and melt nearby objects and
cause severe burns.
• Keep the LE300 not being used away from paper clips, coins, keys, nails, screws or other
small metal objects, that can make a connection from one terminal to another. Shorting the
battery-pack terminals together may cause burns or a fire. For short-circuiting damage
caused in this manner, any and all warranty claims shall be invalid.

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• Use electrically insulated tools for connecting cables.
• The mounting and the electrical connection may only be carried out by trained specialists.
• Use only properly functioning test equipment with this device.
• Internal voltage of device may be higher than the rated level, take care to avoid being zapped
during installation.
• Keep this document in a safe place for the entire service life of the device. Pass the
document on to subsequent owners and operators of the device.
• Incorrect operation can damage system components.
• The device must not be connected to a lead acid battery if it has a damaged casing.
• Factory labels and markings must never be altered, removed or rendered unreadable.
• This device contains sensitive electronics, so take care during installation and use.
• Consider all relevant official safety instructions during transportation of the device.
Safety instructions might vary depending on the mode of transport and on local country
regulations.
• Check the recycling information at the end of the user manual for disposal of device.
Application Scope
• The primary application of the LE300 is the stationary storage of renewable energy in the
area of solar energy.
• This device is for residential, recreational & small commercial operations.
• This device is for operation with 12 V lead acid batteries only. A lead acid charge controller
is needed for correct operation.
• The device is not permitted to be mounted in outdoors, underside, engine compartment or
exposed areas of interior spaces (e.g. side pockets in the trunk, outer wet chamber, spare
wheel recess).
• Failure to follow this precaution can cause damage to this device and the energy source
to which it is connected.
•Consultauthorizedsupplierifdeviceistobeconnectedinnonstandardconguration.
•Sizingofleadacidbatteryneedstottotheoverallsystemdesign.Forlonglifetimeleadacid
battery must frequently be charged to 100%.
•Ifsizingofthesystemisnotdonewithinthespecicationwarrantybecomesvoid.
• The battery connection in the KFZ range need to be chosen <3 m.
• Failure to comply with correct product usage or neglecting the user manual, the warranty
and guarantee becomes void.