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Victron MultiPlus 48 3000 35-50 Manual

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Inverter voltage
Output voltage of the MultiPlus in battery operation.
Adjustability: 210 – 245 V
Stand-alone / parallel operation / 2-3 phase setting
Using several devices, it is possible to:
• increase total inverter power (several devices in parallel)
• create a split-phase system by stacking (only for MultiPlus units with 120 V output voltage)
• create a split-phase system with a separate autotransformer: see VE autotransformer datasheet and manual
• create a 3-phase system.
The standard product settings are for standalone operation. For parallel, three-phase or split phase operation see sections 5.3 / 5.4 and
5.5.
AES (Automatic Economy Switch)
If this setting is turned ‘on’, the power consumption in no-load operation and with low loads is decreased by approx. 20 %, by slightly
'narrowing' the sinusoidal voltage. Applicable in stand-alone configuration only.
Search Mode
Instead of the AES mode, the search mode can also be chosen (with help of VEConfigure only).
If search mode is ‘on’, the power consumption in no-load operation is decreased by approx. 70 %. In this mode the MultiPlus, when
operating in inverter mode, is switched off in case of no load or very low load, and switches on every two seconds for a short period. If
the output current exceeds a set level, the inverter will continue to operate. If not, the inverter will shut down again.
The Search Mode “shut down” and “remain on” load levels can be set with VEConfigure.
The standard settings are:
Shut down: 40 Watt (linear load)
Turn on: 100 Watt (linear load)
Not adjustable with DIP switches. Applicable in stand-alone configuration only.
Ground relay (see appendix B)
With this relay, the neutral conductor of the AC output is grounded to the chassis when the back feed safety relay is open. This ensures
the correct operation of earth leakage circuit breakers in the output.
- If a non-grounded output is required during inverter operation, this function must be turned off, see appendix A.
Not adjustable with DIP switches.
- Models with 50 A transfer capacity only: if required an external ground relay can be connected (for a split-phase system
with a separate autotransformer).
See appendix A.
Battery charge algorithm
The standard setting is ‘Four-stage adaptive with BatterySafe mode’. See Section 2 for a description.
This is the recommended charge algorithm. See the help files in the software configuration programs for other features.
‘Fixed’ mode can be selected with DIP switches.
Battery type
The standard setting is the most suitable for Victron Gel Deep Discharge, Gel Exide A200, and tubular plate stationary batteries (OPzS).
This setting can also be used for many other batteries: e.g. Victron AGM Deep Discharge and other AGM batteries, and many types of
flat-plate open batteries. Four charging voltages can be set with DIP switches.
With VEConfigure the charge algorithm can be adjusted to charge any battery type (Nickel Cadmium batteries, Lithium-ion batteries)
Absorption time
In case of the standard setting ‘Four-stage adaptive with BatterySafe mode’ the absortion time depends on the bulk time (adaptive
charge curve), so that the battery is optimally charged.
If the ‘fixed’ charge algorithm 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.
Automatic equalisation charging
This setting is intended for flooded tubular plate traction or OPzS batteries. During absorption the voltage limit increases to 2,83 V/cell
(34 V for a 24 V battery) once the charge current has tapered down to less than 10 % of the set maximum current.
Not adjustable with DIP switches.
See ’tubular plate traction battery charge curve’ in VEConfigure.
Storage voltage, Repeated Absorption Time, Absorption Repeat Interval
See Section 2. Not adjustable with DIP switches.
Bulk Protection
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). Not adjustable with DIP switches.
… 14 …


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