HOW IT WORKS
8 May 2010 / Mass Combi 12/2500-100; 24/2500-60; 48/2500-35; 48/5000-70 / EN
3.1.2 Temperature compensated charging
The Mass Combi is delivered with a battery temperature
sensor. By installing this battery temperature sensor the
charge voltages are automatically adapted for deviating
temperatures.
See figure 3. When the battery temperature is low, the
charge voltage increases. On the other hand, when the
battery temperature is high, the charge voltage is
decreased. Over charge and gassing are prevented this
way. This will extend the life of your batteries.
See section 5.8 to connect the battery temperature sensor.
3.1.3 Connection of a second battery
The Mass Combi is equipped with second charge output
which can be used to give a maintenance charge to a
small battery set like a starter battery Maximum output
current: 5 Amps.
Output voltage: same as the main charger.
See section 5.8 for connection.
3.2 THE INVERTER
3.2.1 General
The inverter provides voltage and frequency regulated AC
power from a battery bank. Fast acting electronic circuits
protect the inverter against extreme overloads, low and
high battery voltage and overheating of the inverter.
Considerable momentary surge power is available for
starting-up electric motors. High efficiency insures long
battery usage between recharges. A built in energy saving
feature can reduce battery power consumption when the
inverter is unloaded.
3.2.2 Energy saving mode (selectable)
In the inverter mode the Mass Combi has a built-in
automatic energy saving feature that reduces battery
power consumption when no load is present on the
“SHORT BREAK” output. Response from idle is instant. In
most cases the operation is not noticeable. Four modes
can be set by means of DIP-switches, see chapter 6.
The inverter of the Mass Combi can operate in one of the
following modes (table below):
Mode Explanation
High power The energy saving mode is switched off. The inverter is fully operating and the output voltage is 230V AC.
This is the default setting.
Idle 40VA
Idle 150VA
With a connected load less than 40VA or 150VA, the inverter reduces the output voltage to almost zero. The
Mass Combi scans the “SHORT BREAK” outlet with pulses of 230V every 2½ seconds. When it detects a
load that is larger than 40VA or 150VA, it switches on the inverter automatically. Small loads such as clocks
in VCR’s or micro waves are most likely not to work on this mode.
Economy
mode
The inverter reduces the output voltage to 208VAC if the connected load drops below 250VA. The output
voltage will return to 230VAC if the connected load rises above 250 VA. Small loads as clocks in VCR’s and
micro waves will perform equal whether the inverter is running in the economy state or is on. The energy
saving from your batteries is approximately 10%.
For detailed specifications see section 10.1 “DC no load power consumption”
Table 1: Mass Combi energy saving modes
12V
24V
battery temperature (°C)
charge voltage (V)
Figure 3:
Temperature compensated charging
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