5.1 Standard settings: ready for use
On delivery, the MultiPlus is set to standard factory values. In general, these settings are suitable for single-unit operation.
Warning: Possibly, the standard battery charging voltage is not suitable for your batteries! Refer to the manufacturer's
documentation, or to your battery supplier!
Standard MultiPlus factory settings
Inverter frequency 60Hz
Input frequency range 45 - 65Hz
Input voltage range 94 - 143VAC
Inverter voltage 120VAC
Stand-alone / parallel / 3-phase stand-alone
AES (Automatic Economy Switch) off
Ground relay on
Charger on/off on
Battery charge curve four-stage adaptive with BatterySafe mode
Charging current 75% of the maximum charging current
Battery type Victron Gel Deep Discharge (also suitable for Victron AGM Deep Discharge)
Automatic equalisation charging off
Absorption voltage 14.4 / 28.8 / 57.6V
Absorption time up to 8 hours (depending on bulk time)
Float voltage 13.8 / 27.6 / 55.2V
Storage voltage 13.2 / 26.4 / 52.8V (not adjustable)
Repeated absorption time 1 hour
Absorption repeat interval 7 days
Bulk protection on
AC input current limit 50A (= adjustable current limit for PowerControl and PowerAssist functions)
UPS feature on
Dynamic current limiter off
WeakAC off
BoostFactor 2
Programmable relay alarm function
Auxiliary output 25A
PowerAssist on
5.2 Explanation of settings
Settings that are not self-explanatory are described briefly below. For further information, please refer to the help files in the software
configuration programs (see Section 5.3).
Inverter frequency
Output frequency if no AC is present at the input.
Adjustability: 50Hz; 60Hz
Input frequency range
Input frequency range accepted by the MultiPlus. The MultiPlus synchronises within this range with the AC input frequency. The output
frequency is then equal to the input frequency.
Adjustability: 45 – 65Hz; 45 – 55Hz; 55 – 65Hz
Input voltage range
Voltage range accepted by the MultiPlus. The MultiPlus synchronises within this range with the AC input voltage. The output voltage is
then equal to the input voltage.
Adjustability: Lower limit: 94 - 120V
Upper limit: 120 - 143V
Note: the standard lower limit setting of 94V is intended for connection to a weak mains supply, or to a generator with unstable AC
output. This setting may result in a system shut down when connected to a ‘brushless, self excited, externally voltage regulated,
synchronous AC generator’ (synchronous AVR generator). Most generators rated at 10kVA or more are synchronous AVR generators.
The shut down is initiated when the generator is stopped and revs down while the AVR simultaneously ‘tries’ to keep the output voltage
of the generator at 120V.
The solution is to increase the lower limit setting to 110VAC (the output of AVR generators is generally very stable), or to disconnect the
Multi(s) from the generator when a generator stop signal is given (with help of an AC contacor installed in series with the generator).
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