CombiMaster 120V Series –
User and Installation Manual
• DC power supply mode: During an installation
procedure, it may be desirable to test onboard
systems before connecting a battery bank. To do
this, start the CombiMaster Inverter/Charger with
no load connected. Wait for one minute and then
connect a low power DC load. In small steps,
25A max, more loads can be switched-in
sequentially. Do not exceed 50A to prevent
unstable power supply.
• Power sharing mode: The CombiMaster Inverter/Charger automatically reduces its battery charger
output when the load connected to AC OUT increases while the available power at AC IN is limited.
This avoids the external AC circuit breaker from tripping. The power sharing level, i.e. AC IN Limit
setting (adjustable from an optional display), should match the value of the external circuit breaker.
Load on AC OUT < AC IN Limit
Load on AC OUT ≥ AC IN Limit
• AC input support mode: If the demand for AC power
still increases, the AC input circuit breaker may still
trip if nothing is done. This problem can be solved by
the AC IN Support mode. If the total demand for
power exceeds the max external power supply, power
can be added to AC OUT by means of the inverter.
This means that the inverter adds power from the
batteries, in parallel with the external power source.
The continuous load connected to AC OUT should never exceed
• 40A for models 1500W, 2000W, 3000W,
• 85A models 3500W, 4500W, 5000W.
Exceeding the max allowable output current may damage the product.
Note: Depending on national or local regulations regarding AC sources operating in parallel with the
AC grid, AC IN support mode may not be allowed! Familiarize yourself with local regulations on
this issue. AC power from the inverter will never be fed back into the AC grid.
See chapter 5 on page 25 for the required settings for all modes.
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