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RV System won’t charge beyond 50%

I am baffled as to why I cannot charge beyond 50% regardless of charging method. Solar, alternator and even shore power will happily charge to around 50% as expected then quickly switches to float mode and no further charge is applied. I have a Victron multiplus,, Victron solar charge controller and an enerdrive dc2dc charger. All working well till now. Seems maybe an issue with batteries since it occurs across all charge devices?Any ideas or suggestions welcome.

jsgherza asked
jsgherza commented ·

0 Answers

Orion 121230 - Wiring to a Citroen Relay 2017 - standard alternator

I'm getting my head around installing the Orion 121230 DC-DC to my camper. It's for the Citroen Relay (old style non-smart alternator) charging a bank of 2x130 Leuch Adventurers.

I've got a convertors' socket which gives me my link to make a D+ style signal to tell the Orion that 'I'm charging' (see the photos from site) but can't work out how this helps from the manual.




Even after digesting the manual, I'm unsure as to how/if I need to link the orion to the alternator- I got stuck at the 4.4 a- L-H pin wiring b- H-pin wiring and c - L-pin wiring section of the manual.

Looking at the next section 4.5, it talks about an Engine On setup and I've found a download which outlines how to setup a smart alternator with variable alternator voltagges (which doesn't apply to the Citroen).

Please can anyone point me to the next step or where to look to help get my head around it?


littlewigin asked

0 Answers

MPPT 150/100 High Temperature (Dimming) Relay Control

I'd like the fans in my battery box to turn on during high temperature's. The VictronConnect app as an option under the Relay selection called High Temperature (Dimming) - When looking this up in the manuals the only information shared is:

High temperature (Dimming). This option switches the relay ON when the charger output current is reduced due to high temperatures. Use this option to for example switch an external fan.

Does anyone have information? At what temperature does it consider high temperature? What does the "dimming" mean? To be honest I'm a little disappointed at the lack of documentation on this relay options.

hummingbear asked
sunnywell answered ·

2 Answers

Charger - AGM & Lithium

Hi I have a Centaur 12/50 charger onboard and 3 differnt banks of AGM batteries. Last year I replaced the host bank with Lithum and my question is: If I shold replace the Centaur charger with a charger that safely can charge 3 batteries banks with a mix og Lithium and AGM; which charger is then your recommondation? Kind regards Adreamer

adreamer asked

0 Answers

Centaur 12/40 Battery charger fan hums.
The centaur 12/40 charger fan hums all the time when plugged into the mains. Is it a 
feature or a fault?

centaur asked
centaur edited ·

0 Answers

MPPT + Smart Chargers

When I run my generator with the smart chargers turned on and the solar in good sunlight I find I’m having to turn the solar off to the batteries in order to get the smart chargers to start putting out a decent charge current. Once they’ve settled I can switch the solar back on and it will sit in float while the smart chargers provide bulk.
Is there a way I can have all 3 (2x SC 1xMPPT) providing max power at the same time?

They are all connected to a VenusGX with VE.Direct/USB

bora asked
snoobler answered ·

1 Answer

Lynx Distributor Usages Clarifications

Hi All, my first time with Victron products and Solar Energy. Questions about Lynx Distributor. Considering that has 4 slots fused.

1) May I connect the whole system in One Lynx Distributor Unit?.
Slot 1: Multiplus-II 48/3000 (Fused)
Slot 2: SmartSolar MPPT 250/100 (Fused)
Slot 3: Lithium 48V Pylontech US3000 (Fused) (3 parallel modules connected with cable kit 120A/2000mm lenght)
Slot 4: Venus GX (Unfused as brings its own in-line Fuse)

2) Fuses sizing should be MEGA 125A for all 3 Slots? (i.e. Littlefuse MEGA 125A/58V for 48V)

3) Is there a minimum lenght for Cables of Slot 1 and Slot 2, I have available AWG2 35mm2 nominal cable (33,6mm2 actual section). For Slot 3 cable kit size came Pre-Fabricated.

Please if you see any safety issue advice, this is an Off-Grid system. 3000W Panels Array (4series x 2 strings). (SmarSolar is oversized for future expansion duplicating whole system)

Thank you,


sanchuka asked
maxxpwr answered ·

2 Answers

Charge controller in overvoltage fault

Three new smartsolar charge controllers installed. When 24v from batteries is applied to controllers everything is fine and remote display shows the voltage at 27v on each controller. When the PV voltage is applied the first two controllers operate fine but the the third controller goes into an overvoltage fault. When I check the remote display the first two controllers still show 27v while the third controller drops to 14v. Why is this happening?

andrew-fjeldsted asked
Daniël Boekel (Victron Energy Staff) answered ·

1 Answer

Victron Quattro and MPPT Charging LiFePo4 with 3rd party BMS


I have this doubt troubling my mind; I have a pack of lifepo4 with a proprietary BMS (123 Smart BMS) connected to my Victron Quattro inverter charger and in parallel the Victron MPPT. When my Batterie's BMS signals the Quattro to stop charging and enter float mode, will the MPPT charger be aware of this and stop charging as well ? The BMS is connected only to the Quattro (with two pairs of wire) and both Inverter and MPPT are connected to the color display.



cadoxa asked

0 Answers

Will the Orion-Tr Smart DC-DC work with the new vehicles?

How does the Orion-Tr Smart DC-DC work with the new vehicles that have 5 or 6 different charging profiles. For the most part if the battery is topped off the charging system cuts back to 13.6 volts. If you are charging LiFePO4 batteries that require 14.4 volts how does it do that when charging system is at 13.6 volts?


landuytg asked
Justin Cook - Bay Marine Supply USA answered ·

1 Answer

Any disadvantage from choosing Victron BlueSolar MPPT 75/15 instead of 75/10?


from the data sheet it looks as if the Victron BlueSolar MPPT 75/15 is identical to the 75/10 except that it costs approximately 10 EUR more but is capable of charging with 15A rather than 10A.

Is there any reason (except of the 10 EUR) not to choose the 75/15? For my purpose it would be overdimensioned as of now but I may choose to connect larger solar panels sometime in the future.

Best regards,

danielkr asked
christofferbengtsson answered ·

3 Answers

Victron converter-charger??

I have a RV camper and am wanting to know if Victron makes a 120v to 12v ((USA) converter-LiFePO4 charger to replace my factory unit... It must be able to simultaneously serve as both a charger and as a camper 12v power supply...If so, are there any associated Victron devices (such as a control panel, etc) that are necessary to facilitate or enhance charger operations?

I do not need an inverter.

I have a single 200a/h LiFePO4 battery.

Thank You

bunkysdad asked
Kevin Windrem answered ·

1 Answer

Is it possible to connect two DC chargers in series to charge at a higher voltage?


Is it possible to connect two 24VDC chargers in series to charge a battery bank at 48VDC?

There are apparently no 48VDC chargers with Universal input of 90-265V, 50/60Hz.

I thank you in advance for your assistance.


blue-sails asked
harold answered ·

1 Answer

Can a Skylla TG 48/50 charger synchronize with VE.CAN charge controllers?


Can a Skylla TG 48/50 charger synchronize with VE.CAN charge controllers to provide a controlled charge to a common battery bank where several VE.CAN charge controllers are already charging?

I thank you in advance for your assistance.

Kind regards,

blue-sails asked
Guy Stewart (Victron Community Manager) answered ·

1 Answer

Can the MPPT function of a charge controller be turned off?

I would like to turn off the MPPT function on a charge controller.

How can I do this?

I thank you in advance for any assistance you may provide.

Kind regards,

blue-sails asked
porcini answered ·

2 Answers

Has anyone connected a solar panel with an optimizer to VE.CAN charge controller?

What are the field experiences of connecting a solar panel with an optimizer to a Victron VE.CAN charge controller?

blue-sails asked
blue-sails commented ·

1 Answer

Do any current 48v Chargers still offer the high Voltage DC input? Like the Centaur series did.

Do any current Victron 48v Chargers still offer the high Voltage DC input? Like the Centaur series did?

Looking to charge 48V battery occasionally via EV Traction Battery Pack.

rossasaurus asked
porcini answered ·

3 Answers

Phoenix Smart IP43 with MPPT75/15 charging batteries parallel

Hi Victron Community,

I want to build a system for my van, having a Smartsolar charger and a Phoenix Charger (landside power) together charging my two batteries.

1. Question: how are they synchronized, when both are turned on ? if both devices sending energy to the battery, how is the charge state managed from both ?

2. can i use BMV-712 to see, how much energy has been charged with MPPT, with phoenix and energy used ?

thank you !

best regards


manfred-vienna asked

0 Answers

Will Orion Tr Smart DC-DC charger have a Storage step?

Hi all,

I am stuck at home due to lockdown in Italy. I am waiting to get to my boat in order to finish my new battery system as depicted in the schema attached.

The center of the electrical system is the new Orion-Tr Smart 12/30 dc-dc charger, I have built at home a battery system as close as possible to the one I have on my boat in order to test the Orion behavior using 2 batteries (engine and house) and a Smart Charger ip67. I have an ip43 on board but for my purpose is the same.

The ip67 is a 5 step charger when the Orion has 3 steps only.

When the ip67 reaches the Storage state the engine battery drops to 13.2 Volt, but the Orion remains in Float trying to keep the house battery at 13.8 volt draining power for the engine battery. The engine battery voltage drops slowly to 13.1 V and every 10 seconds I hear a click from the Orion and the ip67 for 5 or 6 seconds pumps about 0.7 A in to the engine battery and then drops to 0A when the voltage is 13.2V again. This behavior is repeated endlessly. I could use a higher voltage to trigger the Orion, say 13.5 V, but the house battery could be left uncharged indefinitely.

Do you plan to add the Storage step to the Orion? This will override the problem, I think.

Thank you very much.





pepe1395 asked
spirou commented ·

1 Answer

Using Centaur charger with two battery banks and two BMVs

I have an off-grid solar setup with two completely separate systems. One has four 200 AH batteries, one has three 200 AH batteries. Each have their own MPPT, inverter, and BMV 702 battery monitor (all Victron gear).

The only item I use on both battery banks is a Centaur 12/80 charger. Currently, I only use one output from the charger and charge each bank separately, connecting the negative lead to the load side of the shunt, and the positive lead directly to a battery in that bank.

Although there are three outputs on the charger, they share a common negative.

My question: How do I charge both banks simultaneously while still measuring the current going into each system? Do I split the negative with a busbar?

My current plan is to install two four-way battery switches (similar to this:, one on the positive and one on the negative cables coming from the charger, then have them going to a battery and load side of the shunt on each bank. This would make switching between banks easier and safer than using clips.

Second question: If I did this, could I turn the switches to "both" and charge both banks simultaneously, while still measuring the current going into each bank? Are there significant downsides to this, as far as temperature monitoring?


lachlan-joyce asked

0 Answers

Lowering Charge Efficiency for Aging Batteries

Is there any rules of thumb as to how much to lower the charge efficiency factor when your batteries start to show signs of aging/degradation? The BMV has been reading incorrectly when the SOC nears a full charge, and I heard we need to lower the efficiency factor to get it dialed back in.

If it's currently at 96%, do we want to just decrease it in increments of 10%? That would be starting at 86% and then moving from there. Any input people have from managing this setting on older batteries would be great.

solarsean asked
karlmr commented ·

1 Answer

Output short circuit protection on IP65 12/15 charger

How good is the output short circuit protection on an IP65 12/15 charger? Is it necessary to add a fuse on the 12v DC output side?

Rob James asked
Justin Cook - Bay Marine Supply USA edited ·

1 Answer

Lithium ion charger and converter

Hi there,

I'm in the process of building a campervan and want to use my Lithium battery that is 16,8v at 100% SOC with build-in BMS. I have two that in total gives me app. 5kw of power before 0% SOC that i plan to install.

Most chargers do max app. 14v and that is just not good enough here.

I will setup the system with shore power, solar power and the possibility to use a generator (wind, diesel or regen from propeller). I will need AC power for a 2 stove induction cooker and microwave and guessing peak would be as much as 3kw

Can you recommend me a setup with Vitron components for my Van. I will use this as a showcase as my battery pack soon will go to the consumer marked if we get funding towards this multi purpose of grid battery as expected.

Best Regards


jesper-schweitz asked

0 Answers

IP22 Can the charger be connected to mains when I crank the engine?

The starter motor uses 260A which is provided by the engine battery, BUT can the charger 35A fuse blow if the engine battery is partially discharged when the Engine is started?

johnred asked
JohnC answered ·

1 Answer

How to charge series-12V batteries (24v bank) with 24V-35A alternator, and adding 6kVA genset later?

How to wire 24v alternator to charge 2x12v startbattery and 2x(2x12v) battery bank 24v. (starter, winch & pumps 24v). Possibility to add 6kva genset later.

eqpierre asked
Justin Cook - Bay Marine Supply USA answered ·

1 Answer

What is the charge controllers actual outputs for various solar inputs?

Hi, I am still trying to get confirmation as to what the output voltages of a charge controller is at what voltages inputs from a solar panel.

Like if a solar panel rated at 55vdc @ 100% light, what's actually the output Vdc of the charge controller . in graph form eg: below. such as the victron 150/35

panel @ 100% 55vdc = ?? Vdc @ charge controller output to 12v battery.

panel @ 75% 25vdc = ?? Vdc @ charge controller output to 12v battery.

panel @ 40% 15vdc = ?? Vdc @ charge controller output to 12v battery.

panel @ 10% 5vdc = ?? Vdc @ charge controller output to 12v battery.

As I see at this stage the charge controllers may not put out a usable charging voltage when the solar panels voltages are higher than about 20vdc.

Can someone please confirm if they output all the time if the solar panel voltages vary between say about 13 Vdc and about 55vdc.?

Thank you,


John asked
Guy Stewart (Victron Community Manager) commented ·

2 Answers

Fitting a Pluggable Display onto a SmartSolar CC


I'm trying to fit the pluggable LCD display on to my new SmartSolar 250/100 CC.

It appears that the method of fitting/design has changed. The manual says 'Simply remove the rubber seal that protects the plug on the front of the controller and plug-in the display'.

Mine has a rigid plastic seal attached with 2 screws which uncovers the connector, but my problem is there are also 2 black plastic plugs that need to be removed to reveal the new fixing holes for the display that I can't get out. I've now broken the head off! Anyone know an easy way to get them out as I do want to use the screws to fix the display in.

I'm nervous about pushing in these plastic plugs back into the case as there might be something behind them. Is it possible to remove the cover? If so how?



Tony asked
Matthias Lange - DE answered ·

2 Answers

Why does my MPPT system continually stop charging?

I have 2 100/30 Smartsolar MPPTs integrated with a Quattro 5000 into an ESS, running on 24V lithium batteries. That system consists of 4 panels in 2x2 in parallel.

Can someone please explain to me the reasons for the attached pic?

It's a snapshot of the last 48 hours worth of charging. Both were equally sunny days (actually day 2 was sunnier). The batteries reached a nice good charge of around 95% (possibly reaching absorption voltage) on day 1. Then through the day's consumption, day 2 started out in the low 70s% SOC. But as you can see from day 2, hardly anything came in. The day finished up slightly higher @~75%. Why?

There was plenty of sun. The batteries clearly needed the charge. Yet?

It's obvious the system tried to hold some voltage on the batteries and I'm confused why. This is not the first time this has happened and I'd like to understand how to stop this unproductive behavior from reoccurring.

Thanks in advance,



geomz asked
wkirby commented ·

1 Answer

MPPT 75/10 75/15 and BatteryLife and external chargers

I have MPPT solar chargers with the BatteryLife Option. I wonder how the behavior is with an external charger parallel to the solar charger.

What is maximum voltage on battery output of the MPPTs?

Is there any danger of overcharging the battery?

For example because the time for absorption charging is too long when I charge with the external charger..

Thanks for any answers

der-wu asked
Alexandra answered ·

1 Answer

Charge controller not functioning properly

We have a Victron Solar Blue 100/30 charge controller. Four pv panels provide between 30 and 38 volts (depending on time of day according to the electrian). The charge controller LEDs have stopped functioning and not sending excess power to float. We have dismantled the system to stop the batteries over charging. We are very remote and totally off grid. The installer (via phone) is claiming that there is not enough volts coming from the panels which is why there is a problem. We think the charge controller is damaged/broken. Advice please...

solarafrica asked
solarafrica commented ·

1 Answer

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