How To
COMMON USER MANUAL
FOR
K2 ENEGY SOLUTION’S 12V and 24V BATTERIES
This USER MANUAL covers K2B12V11EB, K2B12V22EB, K2B12V-U1, K2B24V11EB and K2B24V-U1 batteries.
These batteries are broken out into two groups: 12V and 24V after a discussion of common items.
UPON RECEIPT
The most important thing to do when you receive you K2 Energy Lithium Iron Phosphate battery is to charge it! If you ordered a K2 Charger with your battery, you are all set to go! If not, most LFP battery chargers will work with K2 Batteries along with many chargers that support AGM batteries. Please contact K2 Customer Service if you have any questions about chargers or charging.
Due to the UNDOT shipping regulations all of K2’s battery ship at 30% State of Charge (SOC) so charging is the first thing to consider once you have unpacked your battery. If you are using a K2 battery charger it is important to allow the battery sufficient time to fully charge and balance, especially with the first charging cycle. Based on the capacity and the charger used, these batteries this can take from 2 hours to an entire day to charge and balance.
To get an idea of how long it will take to charge a battery simply divide the battery capacity by the rated charger current to get this approximation. For example: a 12V11EB charged with the K2C12V4A charger can take 11AH divided by 4A to get ~3 hours. To arrive at a better time use 11AH x 70% (1-SOC as shipped) to get 7.7Ahrs and divide that by 4A to get ~2 hours of charge time. This method works for all of the batteries and Lithium Iron Phosphate battery chargers on the market.
ONCE CHARGED
Once charged your battery is ready for use or storage. If storage is next, please make you store your battery in a cool dry place and make a point of recharging it every 6 months to keep it in a condition ready to use.
All of the K2 batteries listed have a Battery management System installed, referred to as a PCM (Protection Control Module). The PCM provides a low voltage cut off, based on the lowest cell voltage, typically around 2.0 V to 2.5 V (8 V – 10 V for 12 V batteries and 16 to 20 V for 24V batteries), a high voltage cutoff, once again based on the highest cell, typically 3.7 V to 3.9 V (14.8 V to 15.6 V for 12 V batteries and 29.6 V to 31.2 V for 24 V batteries. These can vary a little according to the balance condition of the battery.
When the high or low cutoffs are out of these ranges it is likely a sign that battery needs to charged and balanced for a day or more. Balancing is accomplished at the end of the charging cycle so it is important to fully charge and balance your battery periodically, typically once a year.
ENVIRONMENT
Where you use and store you K2 Battery is important! The batteries covered by this Manual are splash resistant but not waterproof. These batteries can operate at temperatures between -20 C (-4 F) and 60 C (140 F) and relative humidity between 5% and 95%. However, for best results store, charge and use them between 0 C (32 F) and 50 C (122 F). Always charge your battery after use and store it fully charged between uses.
12 Volt Batteries
K2B12V11EB:
Nominal voltage is 12.8 V
Fully charged voltage is 14.4-14.6 V
Minimum voltage is 8-10 V
Max recommended continuous discharge: 11 A
K2B12V22EB
Nominal voltage is 12.8 V
Fully charged voltage is 14.4-14.6 V
Minimum voltage is 8-10 V
Max recommended continuous discharge: 22 A
K2B12V U
Nominal voltage is 12.8 V
Fully charged voltage is 14.4-14.6 V
Minimum voltage is 8-10 V
Max recommended continuous discharge: 40 A
24 Volt Batteries
K2B24V11EB
Nominal voltage is 25.6 V
Fully charged voltage is 28.8-29.2 V
Minimum voltage is 16-20 V
Max recommended continuous discharge: 11 A
K2B24V U1
Nominal voltage is 25.6 V
Fully charged voltage is 28.8-29.2 V
Minimum voltage is 16-20 V
Max recommended continuous discharge: 25 A
