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Problem diagnosis · Victron Energy

Victron MultiPlus Not Charging — Charge Parameter, BMS & DVCC Diagnosis

Your Victron MultiPlus or MultiPlus-II has stopped charging the battery. The inverter-charger appears to be running but the battery state of charge is falling or stuck. This is the single most common Victron support question — and it usually has a configuration answer, not a hardware one. This guide covers every common cause.
Free remote diagnostic £125 only if we fix it remotely
  • MultiPlus & MultiPlus-II
  • VEConfigure & DVCC diagnosis
  • Third-party battery BMS support
MultiPlus not charging your battery?

We review the VRM alarm log, VEConfigure parameters, DVCC status, and BMS communication to identify why your MultiPlus has stopped charging — and fix it remotely.

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Great experience with STS great communication from Ron, very helpful and knowledgable. Installed me a second Givenergy battery to help take the strain off my original 9.5 that needs refurb due to a weak cell. They secured me an 8.2 arranged install. Levi arrived the whole install was done within 1.5 hours - great tidy job. Worked with me to alter my setup to allow easy removal of my 9.5 when i can get it away for refurb - very happy with their service and its reassuring to know there is a company out there that can help look after my givenergy system

Alan Glaister · Sep 2026 Google

The Solar Tech Support company was the only one to respond to a request for someone to supply and fit a new inverter for our solar panels after our old one finally expired after 26 years. Ron kept us well informed throughout, came and ascertained that the issue was down to the inverter having failed then sourced and fitted a new one. He got the system up and running again, set up the wi-fi performance feedback and took away the old inverter for disposal. By acting promptly and fitting the job around existing commitments we were able to get our solar power unit back in operation with minimal delay in the short while before we were due to go away for a week. The work was carried out very professionally and we were asked to confirm that all was in order the following day. I was impressed that, having recently taken on additional work for GivEnergy customers we were able to keep our solar panel down-time to a minimum. I would highly recommend for prompt attention and first-rate service.

James Dignan · Aug 2026 Trustpilot

Brilliant support to get my solar battery working again. I didn’t expect help on a Saturday but Ron answered the phone, listened and sent me the information I needed to get it going, answered questions etc. A brilliant service I’d happily recommend.

Alison F. Cockerill · Jun 2026 Google

I can add to the list of customers who had already 'given up' on GivEnergy due to their appalling customer service, and that was before they went into administration. So you can imagine my desperation when, having changed my ISP and my Inverter, predictably, proving to be the only device that didn't connect automatically to my new network, I found zero prospect of any customer support with GivEnergy having called in the administrators just five days earlier! The salvation came from Solar Tech Support. My IT advisor stumbled across their web site and some very helpful tips for beleaguered GivEnergy customers, as well as an offer to provide direct assistance. Nothing ventured, I decided to drop them an E-Mail, with very low expectations based on my experience of GivEnergy customer support. Within an hour Ron had responded with some pin point advice, and after a few exchanges of E-Mails he had nailed the problem, enabling the combined efforts of my IT advisor and solar installer to resolve it and reconnect my Inverter. Thank you Solar Tech Support, and Ron in particular, for coming to the aid of a deserted and despondent GivEnergy customer. Expert, razor sharp advice and first class customer service, even though I wasn't officially a customer.

customer · Apr 2026 Trustpilot

Unfortunately, only weeks after Givenergy went into receivership, our system failed. Our installers were unhelpful in the extreme but Solar Tech Support were able to diagnose a terminal problem with our Gen 1 AC3 inverter. They advised regarding the available options and (having decided to buy a replacement Givenergy inverter as the simplest solution) they were able to get us up and running. They made themselves readily available to talk through the process and manage any faults. I would have no problem recommending them.

Stephen Paul · Aug 2026 Google

Absolutely brilliant service. Our GivEnergy battery stopped working for no obvious reason. The manufacturers have gone in administration so no aftercare is available. Our installer could not diagnose the problem and gave up. We were at our wits end. A web search came up with Solar Tech Support. In truth, the reviews almost seemed to good to be true. But Ron diagnosed the problem within the hour and fixed it remotely the same day. He explained everything clearly and thoroughly and has offered solutions to other issues we had too. I honestly cannot recommend Ron highly enough. An absolute godsend in the mess that GivEnergy have left behind in their demise. Thank you again for all your help!

Edward Johnson · Jul 2026 Trustpilot

Last updated

Before you start: You need access to VRM (vrm.victronenergy.com) or VictronConnect (Bluetooth app). If you have neither, we can access VRM remotely during a diagnostic session — you just need to share VRM access or provide your installation ID.

Diagnostics

5-step MultiPlus charging fault diagnosis

MultiPlus charging faults are almost always configuration — not hardware. The charger section, AC input limit, DVCC settings, and BMS communication all interact. Work through these steps in order to isolate the cause.

1

Check the MultiPlus charging state in VRM or VictronConnect

Open VRM or connect via VictronConnect over Bluetooth. The MultiPlus device page shows the current charger state:

MultiPlus charger states
Off: Charger section is completely disabled — check VEConfigure charger enable switch
Bulk: Charging at maximum current — if battery voltage isn't rising, current may be limited to zero by BMS
Absorption: Holding voltage at absorption level — normal, battery is nearly full
Float: Trickle charging — if battery SoC is low, the system shouldn't be in float (wrong voltage settings)
Fault: VE.Bus error has locked the charger — check alarm log for the specific error code

Also note the AC input power reading. If it shows 0W AC input, the MultiPlus is not receiving grid or generator power — that's a different problem (AC wiring, breaker, or grid relay fault).

2

Verify the charge voltage and current parameters in VEConfigure

VEConfigure controls the MultiPlus charger settings. The values must match your battery manufacturer's specifications exactly:

Typical 48V LiFePO4 settings
Absorption voltage: 53.2V – 54.0V (varies by manufacturer — Pylontech: 53.2V, BYD: 56.0V)
Float voltage: 52.0V – 53.2V
Max charge current: Must not exceed battery rated charge rate
Temperature compensation: Must be disabled for lithium batteries

The most common mistake: float voltage set too high, so the MultiPlus never enters bulk mode because it thinks the battery is already charged. Or absorption set too low, so the battery never reaches full charge.

Remote VEConfigure access requires a Cerbo GX with internet and VRM two-way communication enabled. Without this, a VE.Bus to USB adapter and physical access are needed.

3

Check the AC input current limit setting

The MultiPlus limits how much current it draws from AC input (grid or generator). If this is set too low, all available power goes to AC loads — leaving nothing for charging:

• Grid-connected UK systems: Set to your main breaker rating — typically 32A, 50A, or 63A
• Generator-fed off-grid: Must match the generator's rated output — never exceed it
• Common problem: AC input limit left at a low default (e.g. 5A–16A) after commissioning, leaving almost no power for battery charging after household loads
• PowerAssist interaction: If PowerAssist is enabled, the MultiPlus uses battery power to supplement grid power when load exceeds the AC limit — so a low limit can actually drain the battery faster

The AC input current limit can be set in VEConfigure, VictronConnect, or on the VRM remote console under the MultiPlus device settings.

4

Check DVCC settings and battery BMS communication

If your system has a Cerbo GX with DVCC (Distributed Voltage and Current Control) enabled, the BMS controls the MultiPlus charge behaviour dynamically. This is the most common hidden cause of charging failures:

DVCC values to check (VRM → Settings → DVCC)
CVL (Charge Voltage Limit): The maximum voltage the BMS is allowing — if this is lower than absorption, charging caps early
CCL (Charge Current Limit): The maximum charge current — if this is zero, the BMS has blocked charging entirely
DCL (Discharge Current Limit): If zero, BMS has also blocked discharge — indicates a BMS fault condition

Common BMS lockout triggers: low temperature (LiFePO4 batteries typically refuse charge below 0°C–5°C), cell overvoltage (one cell above safe limit), and communication timeout (BMS lost contact with GX device via CAN bus).

If BMS communication has dropped, check the CAN bus cable between battery and Cerbo GX. See our battery BMS disconnect guide for detailed CAN bus troubleshooting.

5

Check for VE.Bus error lockout or firmware mismatch

VE.Bus errors can lock the MultiPlus into a fault state where it refuses to charge until the error is manually cleared:

• Error 11 (relay test fault): the safety self-test on the internal earth and back-feed relays failed, so the unit will not connect to the grid. Do not keep resetting it. This is mains-side wiring and needs a qualified engineer
• Error 14 (device cannot transmit data): Victron gives the likely cause as a short circuit in the communication cables. Victron's remedy is to return the unit to a service point for repair
• Error 17 (phase master missing): In parallel/three-phase systems, the designated master unit has lost communication

Firmware mismatch: If your system has multiple MultiPlus units (parallel or three-phase), all must run the same firmware version. A mismatch after a partial update is a common cause of VE.Bus communication errors. Update the GX device first, then all MultiPlus units together.

See our VE.Bus error codes guide for the full error code reference.

Why MultiPlus charging faults are almost always configuration

The Victron MultiPlus is an inverter-charger — it combines a mains inverter, a battery charger, and a transfer switch in one unit. Unlike simpler hybrid inverters that handle everything internally, the MultiPlus charger behaviour is controlled by a layered stack of settings: VEConfigure parameters, ESS assistant rules, DVCC limits from the BMS, and AC input current restrictions. When any one layer sends a conflicting signal — the charger stops. The hardware is almost always fine. The challenge is finding which layer is blocking the charge.

This is especially common in third-party battery integrations. Victron publishes compatibility lists and recommended settings for batteries like Pylontech, BYD, and Dyness, but installers frequently use slightly different parameters or forget to enable DVCC. Over time, firmware updates on either the Victron or battery side can change the BMS communication protocol, causing a previously-working system to stop charging. We see this pattern weekly — a system that worked fine for months suddenly stops after a firmware update or a seasonal temperature drop triggers the BMS low-temperature lockout.

FAQ

MultiPlus charging faults — common questions

The most common causes are incorrect charge parameters in VEConfigure (wrong absorption or float voltage for your battery type), an AC input current limit set too low (leaving no headroom for charging after AC loads), a BMS lockout via DVCC where the battery management system has set the charge current limit to zero, or a VE.Bus error that has put the MultiPlus into a fault state.
For a standard 48V LiFePO4 bank, typical settings are absorption 53.2V–54.0V and float 52.0V–53.2V — but you must use the exact values from your battery manufacturer. Pylontech, BYD, and Dyness each have different recommended settings. Temperature compensation must be disabled for lithium. If DVCC is enabled, the BMS overrides these values dynamically.
If your system has a Cerbo GX with DVCC enabled, open VRM and check Settings then DVCC. Look at the CCL (Charge Current Limit) being sent by the BMS. If CCL is zero, the BMS is actively blocking charging — usually due to low temperature protection, cell overvoltage, or a CAN bus communication timeout. Also check the battery device page in VRM for alarm flags.
Sometimes. If paralleled units run different firmware versions, or if the GX device firmware is incompatible with the MultiPlus firmware, updating everything can resolve the fault. Update the GX device first, then all MultiPlus units. Never update during a fault condition. If the cause is incorrect parameters or a BMS lockout, firmware alone won't fix it.
Our free remote diagnostic covers the full VRM alarm history, VEConfigure parameter review, DVCC and BMS communication audit, and VE.Bus error analysis. Most MultiPlus charging faults are configuration issues that we resolve remotely. If physical work is needed, we provide a clear scope and quote before booking.
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MultiPlus not charging your battery?

Tell us your MultiPlus model, battery brand, and what VRM or VictronConnect is showing. We'll review the VEConfigure parameters, DVCC status, and alarm history to identify the cause.

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  • Third-party battery BMS support

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