Owners manual MELEX 4XX MELEX 2021/01
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batteries will be greater than 0.3V (voltage measurement without load after 6 hours from the
end of the charging process). During the equalization charge, you should check the electrolyte
density changes every hour and unplug the charger when the density of the electrolyte no longer
increases. The battery electrolyte temperature must be closely monitored against excessive heat.
The maximum temperature of the electrolyte must not exceed + 45⁰C.
Equalizing charging of lead-acid batteries should be done:
1. if level of electrolyte density and/or voltage is different in batteries set
2. On average once per month
Procedure of equalizing charging by recommended battery charger:
1. If the owner’s manual of charger does not describe equalizing process please follow
below instructions:
2. Charge the battery in standard way until switching off the charger (ending of full charge
cycle).
3. Switch the battery charger off.
4. Disconnect battery charger from batteries for about 20 seconds and from power source
in case of switch shortage.
5. Connect battery charger to the power source and batteries.
6. Switch battery charger on. Average time of recharge is 1-3 hours. Control the level and
electrolyte density each hour. Stop the charging process in case the temperature is
exceeded or electrolyte density is exceeded above 1.285 + 0,007 [g/cm3].
7. Repeat the steps from 3 to 5 until electrolyte density will be aligned or it is not growing
(follow this process max. up to 3 times),
8. If battery charger after re-switching on is not switching off in time given in point 6,
contact Service Department.
The percentage charging of the batteries can be verified on base of electrolyte density and
voltage measurement.
Charging
percentage [%]
Electrolyte density
[g/cm
3
] for batteries
Trojan
Battery voltage
[V] for batteries
Trojan
100 1.277 6.37
90 1.258 6.31
80 1.238 6.25
70 1.217 6.19
60 1.195 6.12
50 1.172 6.05
40 1.148 5.98
30 1.124 5.91
20 1.098 5.83
10 1.073 5.75
Test of lead-acid batteries electrolyte density
Measurement of electrolyte density should be done min. once per week after charging. In case
of batteries equipped with central water filling system, the measurement of electrolyte density
can be done once per month, keeping the checking of voltage on batteries min. once per week.
Measured values must be mandatory noted in “battery status form” which is located at the end
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