Load Preconization - SDMO RENTAL POWER R550C2 User And Maintenance Manual

8.4. Load preconization

 Highly discharged or sulphated batteries (formation of whitish lead sulphate deposit on the plates, which becomes hard and
insoluble to acid; this deposit reduce the active surface of the plates, and increases their internal resistance) can no longer
regenerate or be charged in a generating set.
A discharged battery should be recharged immediately, or else it will suffer irreparable damage.
Important
Battery charge
When several batteries are connected together, the following points should be checked:
 Are the batteries connected in series?
 Has the correct voltage been chosen? 1 battery x 12 V , 3 x 36V batteries.
 Adjust the charge current to the lowest battery.
 The power difference between the batteries must be as low as possible.
Example of charge:
 12V 60 Ah battery = charging current 6 A.
 Charge status: 50% (acid density 1.21/voltage when idle 12.30V).
 The battery is short 30 Ah, and this must be recharged.
 Charge factor: 1.2.
 Ah x 1.2 = 36 Ah to be charged.
 Charging current: 6A approximately 6 hours charging required.
Recharging is complete when the battery voltage and the acid density stop increasing.
→ The charging current must always be 1/10
The power of the charger must be suitable for the battery to be charged and the charging time available.
You need to use an automatic charger able to provide a sufficient voltage and charging current, as well as a compensation voltage to
handle spontaneous battery discharge.
th
of the nominal capacity of the battery.
120/298