Operation
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Battery parameters
Function
Switch-on delay
The EFOY Pro fuel cell does not start immediately
if the switch-on voltage only drops below the set
threshold level temporarily. The device only
starts automatically if the switch-on voltage is
still below this threshold level after the switch-on
delay of 60 seconds (operating mode “auto-
matic”). For example, with the factory default of
12.3 V for lead-acid batteries, the switch-on volt-
age must drop below 12.3 V for at least 60 sec-
onds in order for the EFOY Pro fuel cell to start.
If loads with a high rate of power consumption
are operated temporarily, this value must be set
in accordance with the operating times of these
loads.
Switch-on voltage
The EFOY Pro fuel cell switches on at the set volt-
age and charges the battery (operating mode “au-
tomatic”.
Setting too high a value for the switch-on voltage
results in frequent starting of the EFOY Pro fuel
cell. Setting too low a value for the switch-on
voltage results in damage to the battery. The de-
fault value for lead batteries is 12.3 V, which cor-
responds to approx. 50% of the battery charge
condition.
Switch-off voltage
If the battery voltage reaches the set level, the
EFOY Pro fuel cell switches off, provided that the
value set for the "Switch-off current" parameter
or the “Absorption time” has also been reached.
Please note your battery's end-of-charging volt-
age. Note the charging recommendations pro-
vided by the battery manufacturer.
Switch-off current
The EFOY Pro fuel cell switches off if the current
drops below the set switch-off current.
If you want the battery voltage to serve as the
only switch-off parameter, set the maximum
value, as the current is always below this value in
EFOY Pro fuel cells.
