Configuration By Computer - Victron energy MultiPlus 12/500/20-120V Manual

MultiPlus
This setting is intended for tubular plate traction batteries. During absorption, the voltage limit increases to 2.83 V/cell. Once the
charge current has tapered down to less than 10 % of the set maximum current.
Absorption time
The absortion time depends on the bulk time (adaptive charge curve), so that the battery is optimally charged. If the "fixed"
charging characteristic is selected, the absorption time is fixed. For most batteries, a maximum absorption time of eight hours is
suitable. If an extra high absorption voltage is selected for rapid charging (only possible for open, flooded batteries!), four hours
is preferable. With DIP switches, a time of eight or four hours can be set. For the adaptive charge curve, this determines the
maximum absorption time.
Storage voltage, Repeated Absorption Time, Absorption Repeat Interval
See the Battery charger [4] chapter.
Bulk Protection
Default setting: off. When this setting is "on", the bulk charging time is limited to 10 hours. A longer charging time could indicate a
system error (e.g. a battery cell short-circuit).
AC input current limit
These are the current limit settings at which PowerControl and PowerAssist come into operation. The factory setting is 12A.
UPS feature
If this setting is "on" and AC on the input fails, the Multi switches to inverter operation practically without interruption. The Multi
can therefore be used as an Uninterruptible Power Supply (UPS) for sensitive equipment such as computers or communication
systems. The output voltage of some small generator sets is too unstable and distorted for using this setting* – the Multi would
continually switch to inverter operation. For this reason, the setting can be turned off. The Multi will then respond less quickly to
AC input voltage deviations. The switchover time to inverter operation is consequently slightly longer, but most equipment (most
computers, clocks or household equipment) is not adversely impacted.
Recommendation: Turn the UPS feature off if the Multi fails to synchronise, or continually switches back to inverter operation.
*In general, the UPS setting can be left "on" if the Multi is connected to a generator with a "synchronous AVR regulated
alternator".
The UPS mode may have to be set to "off" if the Multi is connected to a generator with a "synchronous capacitor regulated
alternator" or an asynchronous alternator.
Dynamic current limiter
Intended for generators, the AC voltage is generated by means of a static inverter (so-called "inverter" generator). In these
generators, rpm is down-controlled if the load is low: this reduces noise, fuel consumption and pollution. A disadvantage is that
the output voltage will drop severely or even completely fail in the event of a sudden load increase. More load can only be
supplied after the engine is up to speed.
If this setting is "on", the Multi will reduce the charge current until the set current limit is reached. This allows the generator engine
to get up to speed. This setting is also often used for "classic" generators that respond slowly to sudden load variation.
Weak AC
Strong distortion of the input voltage can result in the charger hardly operating or not operating at all. If Weak AC is set, the
charger will also accept a strongly distorted voltage, at the cost of greater distortion of the input current.
Recommendation: Turn Weak AC on if the charger is hardly charging or not charging at all (which is quite rare!). Also, turn on
the dynamic current limiter simultaneously and reduce the maximum charging current to prevent overloading the generator if
necessary.
BoostFactor
Change this setting only after consulting with Victron Energy or with an engineer trained by Victron Energy!
Programmable relay
By default, the programmable relay is set as an alarm relay, i.e. the relay will de-energise in the event of an alarm or a pre-alarm
(inverter almost too hot, ripple on the input almost too high, battery voltage almost too low). With VEConfigure software or the
VictronConenct app, the relay can also be programmed for other purposes, for example, to provide a generator starting signal.

5.3. Configuration by computer

All settings can be changed by means of a phone, tablet or computer.
The following is required:
• The VictronConnect app or the VEConfigure3 software package. Both can be downloaded free of charge from the downloads
section on www.victronenergy.com.
Page 15 Configuration