- Initial charging current to be 0.3C ( IE 30 amps for each 100 A/H)a.This requirement is important and must be adhered too at all times.
- Bulk charging voltage is 2.45volt per cell @ 25°C (14.7 v for a 12volt block)a.Charging below this rate will result in partial charging and void any warranty.
- Absorption charging voltage is also to be 2.45 volt per cell @ 25°Ca.This should continue until the tail current reaches at least 0.03C (IE 3 amps for a 100A/H battery).
- Float charging voltage to be set at 2.26667 volts per cell (IE 13.6 volts for a 12-volt block) @ 25°Ca.The current should be monitored to ensure it does not exceed 0.01C (IE 1 amp per 100 A/H in the battery circuit). b. Extended high float current will result in dehydration of the product. Extreme cases will result in a badly swollen product.
- Temperature compensation on extended float voltage must be adhere too as extended float charging at high temperatures will have an effect on battery hydration levels.
- Batteries that are used in float applications must be cycled to at least 50 % DOD on a bi-monthly basis.a.This is a warranty requirement from the manufacturer.
- The manufacturer insists that the user or installer must prime the battery set by cycling it 5 times and equalising the bank installation before commissioning the system.
- If the installation consists of only one block then the battery must be fully cycled 5 times to 50% DOD and recharged as per specifications.
- The procedures are set out in the installation manual of the manufacturer.
By Carl Luther – Deltec Energy Solutions