victron energy MultiPlus-II Inverter-Charger User Manual

victron energy MultiPlus-II Inverter-Charger

Product Information

The MultiPlus-II, EasySolar-II, and Quattro-II are inverter/chargers manufactured by Victron Energy. These devices may experience an issue with the Current Sense socket, resulting in incorrect readings for the AC input current. This problem has been reported in only a few dozen units, making it a rare occurrence. Victron Energy has provided a simple solution to resolve this problem, which is documented in this Tech Note.

The symptoms of this issue manifest when the grid is connected to the AC-input and may include the following:

• The AC-input (Grid) reading on the GX and VRM stays at 0.0 W orindicates an incorrect value.
• The AC Loads show 0.0 W on the GX and VRM dashboard, even whena load is connected.
• The unit fails to charge the batteries, despite the charge LEDsindicating that it is charging.
• In charger mode, the MP-II does not display the charge valueson the GX device or VRM Dashboard.
• In an ESS system without an external grid meter, the unitbehaves unpredictably by feeding back into the grid or displayingstrange values.

Picture left showing incorrect data on (CC)GX and the VRM Dashboard.
Picture right showing 0.0W AC Loads and 63W consumed power from the grid. In reality a 600W load is connected!

Affected models

All MultiPlus-II, EasySolar-II and Quattro-II models.

Cause
The cause is a hardware issue with the “Current Sense” socket on the bottom side of the unit. When an external current sensor is connected, the internal one is disconnected through this connector. Sometimes the contact inside this connector gets ‘stuck’ due to heat during the production of the board.

Solutions
There is a simple solution to resolve this problem and no need to raise an e-RMA for this; only create an e-RMA when the described method below didn’t succeed.
Insert a 3.5mm jack plug a couple of times and remove it again. E.g. an (old) headphone plug should work. This releases the ‘stuck’ connector and making it properly register that a plug is -not- inserted.
See appendix for details.

All MultiPlus-II, EasySolar-II, and Quattro-II models are affected by this issue.

The cause of this problem is a hardware issue with the Current Sense socket located on the bottom side of the unit. When an external current sensor is connected, the internal one is disconnected through this connector. In some cases, the contact inside this connector may get ‘stuck’ due to heat during the production of the board.

Product Usage Instructions

To resolve this issue, follow these steps:

1. Obtain a 3.5mm jack plug, such as an (old) headphone plug.
2. Insert the jack plug into the Current Sense socket on thebottom side of the unit a couple of times.
3. Remove the jack plug.

By performing these steps, you release the ‘stuck’ connector and ensure that it properly registers that a plug is not inserted. If this method does not resolve the issue, you may need to raise an e-RMA (Return Merchandise Authorization).

Please refer to the appendix for detailed information on the connections of the MultiPlus-II unit.

Appendix – repair instructions

These instructions are provided to help anyone with a MultiPus-II, EasySolar- II or Quattro-II which is not behaving as it should. Trying to solve the issues by following these instructions is always recommended to do, as it cannot do any harm to the unit.

• Step 1: turn the I-0-II switch on the bottom of the unit in the ‘0’ (Off) position.
• Step 2: open the black connection cover by unscrewing the two screws at the bottom.
• Step 3: insert a 3,5mm jack plug (any 3.5mm jack plug will do the trick, e.g. an old headphone or audio plug) a couple of times in the Current Sense socket to ‘reset’ the connector. Do not leave the plug in the socket, always make sure to remove it.
• Step 4: Turn the unit ‘On’ and check on your GX device and/or on the VRM dashboard to see if the AC-input current is showing the correct values.

Picture of the connections of the MultiPlus-II. Encircled the Current Sense socket.

Victron Energy B.V.

• De Paal 35 | 1351 JG Almere | The Netherlands
• E-mail: sales@victronenergy.com
• www.victronenergy.com

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