Advice for my off-grid setup!

Hello everyone. I have made a final setup that im going to install shortly. I would love to hear some advices about the setup, i am no expert so anything will help :)

-12x450Wp Trina solar

-Multiplus II 48/5000

-Smartsolar MPPT 250/100-Tr Ve.Can

-4x US2000B Pylontech

-Cerbo GX

-GX Touch 50

-And maybe the Lynx Power In to be able to install MEGA Fuses.

What do you think of this system? Thank you in advance!

tpwchr asked
Murray van Graan answered ·

1 Answer

Mppt 75/15 doesn't charge thought the load terminal

Hi there,

I'm having some issues with my smartsolar, that doesn't provide enough current through the load output. Everytime a load tries to push/start to operate, the mppt voltage on the app goes up and down like something is wrong.

Any way I can find how to fix this or what could be the reason?

mikedf asked
mikedf commented ·

4 Answers

MPPT update to charger panel wiring

I recently Upgraded to SmartSolar Charger MPPT 100/50 for my RV setup. I presently have 3- 160W (8.38A) Flex panels run in parallel to the charger (based on advice for my previous 30A PWM charge controller).

I am looking to add a 4th panel to the setup and more storage capacity. my question is wether I should add it in Parallel as well or should i rewire for series or series/parallel for this new controller? attached is previous wiring Diagram with old charge controller for reference.

Any advice would be greatly appreciated.


m-beach asked
Rob Fijn commented ·

3 Answers

New VE.Can MPPT charger doesn't use BMV current value for tail current

Hello Community,

in december 2019 a great feature was added to the firmware 1.47 of the MPPT chargers:

tail current mechanism improved: it can now use the real battery current. The current can be received via VE.Smart Networking (Bluetooth) as well as from a GX Device

This is a useful feature I'm using in most installations since it has been released. A week ago I tried to do the same with a VE.Can SmartSolar and unfortunately it doesn't seem to work at all.

The system consists of a CCGX, BMV700, Multiplus 5000 and VE.Can 250/100 SmartSolar. Other devices have been removed to keep things more simple.

There is no ESS/HUB assistant installed and therefore no active external control of the charger. Also no bluetooth smart network has been created and the firmware is up to date on all products. In the system the BMV is set as the default battery monitor to use and SOC syncs well with the multiplus. DVCC and SCS are enabled and SCS status is active. In the carger the absorption time is set to a fixed time with a tail current of 10A. If the current value falls below that value for more than one minute the charger should end absorption stage earlier and pass over to float. But it doesn't. Nevertheless DVCC is working with voltage, temperature and even current (tried a limit on the system). It seems the charger just has no use for the value "battery current" sent from the BMV and uses it's own current value instead to end absorption.

I have asked dealers, distributors and victron support, but all of them told me the charger would be able to do this without testing it. So I'd really appreciate if someone with a new CAN system (the old chargers can't) could test this. Of course a load must be switched on to have different current values between charger and BMV. I just want to know if this feature is working or has not been implemented yet and victron doesn't know about itself. If it works probably someone finds a mistake in my settings? I would prefer I made a mistake.

Thank you very much!


canarias asked
canarias commented ·

1 Answer

Voltage variance between SmartSolar 100/20, BMV712 and multimeter

Hi there,

I am in the middle of setting up my first pieces of Victron gear with my lifepo4 100ah 12v battery.

I love the features and the quality construction but I do have a question.

I am seeing different voltages across my victron gear and readings from a multimeter.

  1. BMV712 reads 13.34v
  2. SmartSolar 100/20 reads 13.33v
  3. Multimeter reads 13.28v

i have taken multimeter readings from various areas. The battery terminals, from the terminal and the shunt and from the mppt terminals. All readings are 13.28v

I have seen comments that there could be an incorrect fuse in the BMV712, but I’m also wondering what could cause this?

I have no long runs of wire and I have checked the crimping on my connectors.

My primary concern is the the mppt charger will stop charging too soon.

Thanks in advance for your help.

corbijn asked
marky01 answered ·

3 Answers

Looking for advice on my planned setup!

Hey everyone. My current setup is 6x40W Coleman solar panels, using 2 cheap Coleman charge controllers, connected to 2 Trojan T105 6V golf cart batteries.

My new plan is to add a 100W solar panel to my system, along with the Victron SmartSolar MPPT 100/20 charge controller to replace the cheap Coleman units. I believe this will put me at about 19.6A. Does anybody see any issues with this new setup?

I'm also wondering about wiring this all up to the charge controller. My current setup uses SAE Y branch connectors. Any advice is appreciated!

lorettaboy asked
marky01 answered ·

4 Answers

Do I need a DCDC charger using just a solar MPPT?

Do I need a DCDC charger using just a solar MPPT?

4WD canopy and I want to try 100% solar charging before I hook it in the car alternator

Battery is a single 110ah lithium battery

Solar panels have yet to be purchased but I want to buy a single fixed panel approx 350kW, hardwired, and a 180kW blanket. When I run them both, via a switch I expect to run them in series as I understand this is the most efficient option for unbalanced panels.

Is there a 'perfect' sizing for a Victron MPPT and panels?

Peter asked
Peter commented ·

2 Answers

MPPT Solarregler 75/15 nach Firmwareupdate ohne Funktion - wann kommt eine Stellungnahme des Herstellers

Hallo Team Victron Energy,

Ich habe sehr viel Geld bezahlt für meine ganzen Victron Energy Systeme und war bis lang auch davon überzeugt.
Seit dem letzten Software Update funktioniert nicht nur mein MPPT Solarladeregler nicht mehr. Im Netz haben viele dieses Proplem.

Wann kommt eine Lösung. Wenn keine kommt, wie bekomme ich die alte Firmware wieder auf mein MPPT Regler aufgespielt.

Ich hoffe auf eine zeitnahe Reaktion des Herstellers. Es ist offensichtlich das hier was schief gelaufen ist wenn so viele USER die gleichen Propleme haben.

Mit freundlichen Grüßen

harald-tedesco asked
stefanie commented ·

1 Answer

Plug in extra 100w panel directly into mppt charge controller


I have 2x100w flexible panels on my roof. The max wattage I get through these is roughly 50 watts (my advice, never buy flexible panels, too much efficiency loss in heat). Amperage is thus around 4. I would like to add another 100 watt panel (rigid). Can I run the wires of the new panel directly to my mppt 75/15 controller and join them there with the existing ines? Or do I need to join them before?

I think the 75/15 could handle 3 x 100 watt panels (12v) if two of the panels mostly operate at 25% efficiency, right?

Thanks a lot in advance.

totomundo asked
Alexandra answered ·

1 Answer

Add Motorhome inverter

I have a MPPT 75/15 with Bluetooth already installed with 2 x 100W solar panels and 2 x 95 amp AGM deep cycle batteries.

I would like to add an inverter to charge e-bike batteries (2 x 2 amp chargers) from solar. If I use a Phoenix 12/500, can I monitor/control the inverter from the App. If not, what else would I need to allow inverter on/off control and battery monitoring.



usbrit asked

0 Answers

PV_ Insel / Heizstab Regelstrategie / SPS Kommunikation


seit drei Jahren läuft mein Halbinsel-Setup, basierend auf:

6kWp PV,

Multiplus 5000,

2x smart Solar 250/65

BMV702 und

ca. 30kWh OPsZ Batterie (Hoppecke)

sehr erfolgreich.

Ich habe Venus GX auf einem Raspberry Pi laufen und mein Monitoring hat nach anfänglichen SD-Karten Problemen nun seit über einem Jahr gut funktioniert.

Nun hat man ja immer neue Ideen und, mehr aus Lust an der Sache als auf Basis wirtschaftlicher Erwägungen, habe ich mir nun weitere 3,3 kWp auf einer Dachfläche installiert, die nach PV schreit.

Ich habe bereits vor einiger Zeit einen 48V DC- Heizstab (1500W in zwei Stufen je 750W) in meinen Pufferspeicher für Heizung und WW-Bereitung installiert. Direkter Anschluss an der Batterie über 2 Schütze. Hintergrund ist meine Pellets Heizung, die an warmen Sommertagen zur Brauchwassererwärmung läuft uns damit mein Wohnzimmer weiter aufheizt.

Da ich generell meine Heizungssteuerung auf SPS Basis neu aufsetzen möchte, möchte ich natürlich eine Regelstrategie für die Heizstäbe programmieren.

Ich wende mich an das Forum , da ich möglichst mit der einfachsten der vielen möglichen Lösungen starten kann.

Meine Bedürfnisse:

Datentransfer vom Raspberry Pi ( Venus ) oder den Einzelkomponentenauf die SPS ? (Siemens Logo oder S7, ich habe auch noch einen Wago 750 controller rumfliegen, aber ich würde lieber bei der Siemens Range bleiben.)

- Hier sind folgende Werte wichtig.

MPPT-State (Smart solar Charger)

Batterie Spannung (BMV)

ggf. Netzeinspeisung des Multiplus. Dies ist aktuell möglich, wenn die Anlage jedoch ohne Netzanschluss betrieben wird, ist das keine Option.

Grundsätzlich ist es interessant zu wissen, wann die Solarladeregler nicht alles aus den Modulen herausholen, was aktuell geht. Andererseits kann man auch den Batterie SOC nehmen und ein Zeitfenster festlegen, in dem theoretisch noch die Sonne scheinen könnte. Was ich nicht will ist der Betrieb der Heizstäbe aus der Batterie sondern lediglich (hauptsächlich) aus überschüssiger Solarenergie.

Die einfachste Regelung wäre eine Relaiskontakt am MPPT, der mir sagt, wann er mehr rausholen könnte. Dann könnte ich eine gewisse Zeitspanne für den Heizstab vorsehen. Wenn das Relais in der Zeit nicht abfällt, könnte ich die zweite Stufe auslösen und so lange laden, bis das Relais abfällt.

Gerne würde ich aber in Form eines kleinen Brain-Drain Eure Meinungen hören.

Beste grüße,


matteng asked
thomasw-1 edited ·

3 Answers

MPPT 75/15 nach Update defekt?

Hallo zusammen,

unser Laderegler MPPT 75/15, an einem 135Watt Modul, direkt an AGM Batterien angeschlossen, lief nach Installation ein Jahr völlig ohne Probleme. Seit ein paar Wochen hat das Gerät Aussetzer (lädt sporadisch nicht, Spannung Solar wird nur mit 12,7V angezeigt, obwohl gut 24V vom Modul ankommen)

- Die Batterien/Akkus haben wir geprüft, volle Leistung und Spannung vorhanden, auch unter Last

- alle Kabel Verbindungen geprüft

- vom Modul kommen über 24V

- alle Verbindungen getrennt, nach ca. 1 Stunde wieder in Betrieb genommen

- das Problem besteht auch, wenn die Akkus nicht voll sind (wie gerade im Screenshot). Vom 29 bis 31 haben wir ohne Landstrom gestanden, keine Ladung.

Wir haben den Verdacht, dass es mit dem kürzlich durchgeführten Update zusammenhängen könnte. Ist das Problem bekannt oder kann uns jemand helfen? Vielen Dank!

Hier ein Screenshot:


joerg asked
harald-tedesco commented ·

3 Answers

Warning! Voltage cutoff not working on SmartSolar. Many expensive batteries destroyed.

Hi. I have over 100x SmartSolar 75/15 controllers. I have discovered that when used on a 24v system, even though the jumper is on pins 2+3 (Cutoff should be 23.6v). It does in fact not cut at all. On many of my systems there has been voltage drop all the way down to 17v. I have lost $1000s in destroyed batteries.

Is this a known fault? What can I do about warranty?

I bought them from Access Antenna in Perth, Australia. They have provided no support other than directing me to ask my question here.



Thomas Rasmussen asked
klim8skeptic commented ·

1 Answer

3 x SmartSolar 150/100 CAN Not Charging

Hi, we have a situation where the charge mode of the 3 x 150/100 CAN MPPT's are not outputting current/power. The MPPT's show bulk charge mode on the devices, however the VRM home page shows 'storage'. We believe this discrepancy is resulting in the MPPTs not charging the batteries.

We have rebooted, reset, unplugged all comms cables and can't get the MPPT's to start charging. All MPPT's have previously worked fine until multiplus settings were slightly adjusted (this shouldn't have anything to do with MPPT's?) and since MPPT's won't charge.

PV voltage is fine, all other connections haven't changed since it previously worked. We feel it is something to do with the comms between units or a Cerbo setting/issue? DVCC is enabled and set at 195A so this should be fine? The images below are from the same time showing different MPPT charge states (VRM/Cerbo and Device) and PV voltage.

Any thoughts much appreciated?




Sean asked
Sean edited ·

2 Answers

Smart Solar Mppt 150/100 VE.can not charging batteries


I need some help here. I have a new charge controller mppt 150/100 Tr VE.can model installed on a new installation but has failed to charge the batteries. It's is connected to 18 modules of 270w/24v each wired into 6 series strings @ 72vdc each with an average Voc of 105V. These are connected to the charge controller through a 6ways combiner box

Other components on the system are multiple 3000/48vdc, CCGx, BMV700 battery monitor and Gx Gsm

That controller starts normally but cannot charge when the Pv breaker is closed. Charge state goes to bulk but It indicated 0.0Amps charging current, power is 4W, 102V on PV voltage and 51.4V battery voltage. I have updated firmware and tried to go through the configuration as recommended from similar challenges like low temp cutoff is diabled, DVCC current limits is diabled, charger enable switch is on but still no charge. I have tried reset setting to default several times, disconnecting battery and pv connection for some minutes and reconnecting but still no charge


What could be the problem here??

Ssemujju Abdul Hakim asked
Sean answered ·

3 Answers

What does the CerboGX add if I have Smart Dongle, Smart Shunt, Smart Solar MPPT and Multiplus?


I'm trying to sort out if I should add a Cerbo GX. If I don't plan to use a GX touch in the system what would I be missing if have a VE.Bus Smart Dongle, a Smart Shunt 500A, a pair of Smart Solar MPPT and a Multiplus Inverter? I am accessing everything via Victron Connect over Bluetooth and use the MK3 for configuration which is disconnected once the system has been commissioned.

Would there be a better solution for monitoring these components? I'm not sure I would hook the system up to the internet for portal access except for remote support.

Thanks so much for any guidance on the best way forward.


Ken Hughes asked
Ken Hughes commented ·

1 Answer

Using multiple Charge Controllers vesus 1large controller

My RV repair/update shop that I own has installed many systems over the years. Our normal way is to use a single charge controller for up to 1kw array. Being a mobile application we have always installed in parallel. My question is would installing a charge controller for each panel versus using one large controller work?

I'm plaining on a 2kw system, and the biggest downside I can see in my head is the physical space needed for 10 controllers. But doing some reading on this forum I'm now starting to wonder about controllers prematurely going into float before the batteries are fully charged.

Please advise

infinityjim asked

0 Answers

3 PV arrays, 3 MPPT and 2 battery banks

Hi - I have 3 separate solar arrays, each feeding into its own 75/15 MPPT which then feeds 2 separate battery banks (which can be individually selected or linked with a selector switch)

I guess my question is should/could all this be run on a single VE network? (I have 2 shunts, 2 BMS, 2 smart protect, 2 battery sense and 2 LiFePo 100Ah batteries)

Many thanks for all your help

alex-2 asked

0 Answers

Maximale Anzahl von MPPT Laderegler an einem Cerbo GX


ich habe eine Solaranlage mit 2 Victron SmartSolar MPPT 150/45-MC4 für Ost/West Ausrichtung. Verbunden über mit einem Cerbo GX. Dieser ist wieder mit einer MultiBox II 48/5000 und PylonTech Akkus verbunden.

Jetzt möchte ich meine Solaranlage erweitern mit 2 Solarmodul String in anderer Ausrichtung.

Hierfür benötige ich 2 weitere Virtron SmartSolar MPPT 150/45-MC4.

Kann ich diese 2 Laderegler mit an die Cerbo GX Box anschließen?

Ich habe ja nur einen weitere (3 insgesamt). Oder gibt es weitere Möglichkeiten (z.B. USB) zum anschließen die ich nutzen kann?

Würde mich über Eure Tipps freuen.

Viele Grüße


Thomas Heins asked
seb71 edited ·

1 Answer

MPPT SmartSolar 100/30 Charge Controller Support


Recently installed this system in line with a 100 12 V Battle Born battery and a 12 V AIMS Power 1250 W inverter charger. The controller remained with a blue light on bulk but appeared to be charging the battery. Curious if I’m doing something wrong or a voltage threshold hasn’t been met that would activate the absorption or float lights to activate.

jemal-swoboda asked
seb71 commented ·

0 Answers

BMV-712 USB Cable Limits?

We have a BMV-712 that seems to have intermittent problems with 30' USB Runs to 2 MPPT Controllers. We've tried 2 different powered USB hubs (on the MPPT side) and 2 different USB cables (with booster chips) to no avail. I've unplugged the USB WIFI dongle because it too seemed to be dropping out intermittently. Everything is patched to the latest firmware. Here's what I'm wondering:

1) Is there is a known problem with longer USB runs?

2) Is there possible a problem with my BMV's USB interfaces?

3) Would a powered USB hub on the BMV side be better placement to amplify the signal to-from the MPPTs?

Many thanks!


exchangegeek asked
exchangegeek commented ·

1 Answer

networking options for MPPTs and shunt

I am rebuilding the charging system on my boat (700 Ah Firefly battery bank). I have two 150/70 VE.Can MPPTs and a smart shunt on the ground return. The MPPTs are VE.Can cabled to a cerbo GX and the smart shunt is connected to the cerbo via a line. The 1200 W solar can deliver up to 100 amps at peak into the batteries. A few questions:

1) is the network between the MPPTs and shunt done over Bluetooth or does the cerbo broker the conversation using the VE.can and feeds? I much prefer hard wired connections

2) depending on (1), I may need to downgrade from a smart shunt to a shunt that has analog sense outputs that can be used by my new wakespeed 500 alternator regulators, as they don’t yet have support from Victron to get the VE.can data from the cerbo (per wakespeed rep). I love my smart shunt but without analog sense wires I’d either have to put another shunt in series or just swap out the smart shunt for an older one with both and analog out.

mike-miller asked

0 Answers

CB Radio disables SmartSolar 100|30

Hey guys,

i have a weird issue with my SmartSolar 100|30. Im running an EU-Standard CB radion (27mhz 4 watt), with an antenna on the roof of my van, next to my solar panel. Whenever im transmitting the charger turns off. Checking the status with victron connect shows that the charger is disabled in the settings. it turns on again as soon as im stopping to transmit. I does not matter if im running AM or FM. A similar powered hand held radio 2m away doenst trigger the issue.

Is this indented or did i find a bug?

Erik Sporns asked
Erik Sporns answered ·

1 Answer

Maximun current and MPPT controler

Good day all,

Apologies if this has been asked and answered already. I have been searching for a couple of days now and not been able to find the answer yet.

I am in the process of upgrading and installing new batteries as well as a larger solar array on my boat.

I have bought 3* 220ah Victron deep cycle gel batteries.

My solar so far consists of two 365W panels with a Voc of 41.13V and Vmp of 33.96. the current ratings are 11.30 lsc to 10.75lmp per panel.

My plan is to connect these in series. I will be adding some more solar to these, probably 2 150W panels at a later stage.

According to the information I have been given and my calculations, the max carging current for the batteries will be 44A.

My question is this:

I have been advised to get the 150/85 MPPT controler for this as it can take up to 1200W for a 12V system. Is this really needed if I need to limit the charging current to 44A. Will a smaller MPPT better/worse for the charging of the batterie bank? or will it make no difference?

Kind thank you in advance.

Pieter Jordaan

jordaanp asked
seb71 commented ·

3 Answers

Charge Controller showing low Voltage



My 100/50 has been working fine for over six months. Recently I noticed through the connect app that the batteries had failed to charge for a few days. Looking at the controller it was not charging even though it was sunny day. The PV voltage was showing at 12.6. I disconnect the solar inputs and measured 19.8 volts coming from the panels. reconnected the input to controller and back working. This has happened twice now and this time controller is saying 6v and I can't get it to charge. Any thoughts?

adobe asked
adobe commented ·

1 Answer

MPPT SmartSolar and Orion-TR Smart charge disconnect

As the title says, I have a SmartSolar MPPT Charger and a VE.Bus BMS, to which I have just added a Smart Orion-TR Non-Isolated Charger. I currently already have a VE.Direct non inverting remote on-off cable to connect the BMS charge disconnect output to the MPPT VE.Direct interface. Now I want to also control the Orion-TR via the BMS charge disconnect.

Can the digital charge disconnect output of the VE.Bus BMS drive both the input of the Orion-TR remote on/off and the input of VE-Direct non-inverting cable module? In other words, can I leave the non-inverting remote on/off cable plugged into the BMS and simply add a wire from the BMS to the Orion?

robertsonics asked
stefanie commented ·

1 Answer

SmartSolar 100|30 doesn’t show wattage/amperage

Hi there,

I just received the SmartSolar MPPT 100|30 and after connecting it, immediately I saw the voltage from the solar panels and the batteries, but nothing else. Any idea why I don't see any wattage or amperage?


alex-schijf asked
alex-schijf commented ·

6 Answers

Victron SmartSolar MPPT 20A 100V - setup questions

Hi All,

I am relatively new to campervan setups, and I do not have a background in 12v electrics.

I have had a Victron Smart Solar 20A 100V MPPT installed in my campervan together with a new leisure battery, which I am really pleased with on first inspection.

There are a number of options in the Victron Connect app to allow configuration of the Smart Solar 20A 100V MPPT, here are the settings I am talking about.


It looks like most of the settings (Charge Voltages etc.) are set by either selecting a Battery Preset (see options below), or by selecting "expert mode" and specifying your own numbers for the Charge Voltages. The "factory default" seems to be the Gel Victron Deep Discharge option.

The other Battery Preset options available are:



It says in the manual to ensure the settings match your specific leisure battery, and this is where I am struggling - I cannot seem to locate the information needed. The leisure battery installed is a 12V 110AH Xtreme AGM Leisure Battery (XR1750) NCC Class A.

So, my question are:

  1. Are the Factory Default settings ok for my specific battery? Or should I change them?
  2. If I need to change them, then:
    1. Should I pick another pre-set, if so which one?
    2. Or, should I use expert mode and set the Charge Voltages manually? And if I do, what numbers should I use?

A final (less important question) also

  1. What does the "equalisation stuff" do, and do I need to worry about it?

Thanks everyone!

monstreruk asked
stefanie answered ·

1 Answer

components needed to charge batteries and then go to hot water heater

Good day all.

I am new to this technology and am getting conflicting answers in the "retail world".

I would like to set up a solar system (2x350 Watts) to charge 4x100aH LiFePo4 Batteries and when those are topped up to switch over to start a hot water heater (Bosch or Rheem) to heat the water. Of course at a set temperature I would want to switch off the heater and not have it switch on again until it dropped several degrees so it is not cycling on and off too often.

What components do I need (and what specs) to make this work efficiently. I am thinking I would like to use the Cerbo GX to monitor all of these (and more) devices.

I would appreciate the solution details and any things I should be concerned about that could go wrong.

Many thanks,

davidervin asked

0 Answers

Smart mppt 150/35 gives error 33 allready at 130V. How can i change the setting to 150V?

Smartsolar MPPT 150/35 will not charge because it always gives error 33.

I have 2s2p config of 4 Panasonic HIT panels.

Voc is 133V. This is a lot less then the max. 150V

rene-e700 asked
rene-e700 commented ·

2 Answers