SDMO R570U, User And Maintenance Manual

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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
th
of the nominal capacity of the battery.
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.
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