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MPPT 75/10 and blue smart charger in parallel?

Hey, i'm currently working on a small mobile solar station with a Victron Li-Ion-Battery for education purposes. When the station is outside it should yield its energy via an solar panel and the Victron MPPT charge controller. When not in use, it will probably stay inside for a longer time. For this case it would be great if the battery coulld be charged via the Victron Blue Smart charger off the grid. Is it possible to connect both devices, the Blue Smart Charger and the MPPT solar charger, in parallel to the Li-Ion battery? (VE.Bus BMS will be installed)

To my understanding, since both devices work in the same output voltage range, this shouldn't be a problem.

Many thanks in advance


andi asked

0 Answers

Anyone with a Ziehl unit in the installation?


I was hoping i could see how others have implemented the Ziehl anti islanding units in their installations.
I find the schematics in the manual a little overwhelming and would like to see examples in victron installations if possible.

Are you using one or two contactors?

Kind Regards

ehsab asked
tj-botten commented ·

1 Answer

Installing an Orion-Tr Smart DC-DC charger non-isolated

Hello, I intend to use an Orion-Tr Smart DC-DC charger non-isolated as the battery to battery charger in a motorhome that uses a Schaudt Electroblock EBL29 and currently has 2 Exide GEL 80Ah leisure batteries fitted. Can I install the charger horizontally rather than vertically as suggested in the manual?.

Thank you


andrew-wills asked
erickufrin answered ·

1 Answer

Isolation transformer earth connection

Hi all,

Just confirming here that when my boat is floating on the water there should be a link from the input PE terminal to J34a.

So, the earth wire from the shore power supply flex is connected to the input PE terminal and I make a small wire up with a female spade connector from this input PE terminal and connect it to J34a?

This transformer is not the auto 115v - 230v switching model

Many thanks

metal-snapper asked
jwfrary commented ·

6 Answers

Battery cable length in manual, one way or return?

In reading the manuals for inverter /chargers, it isn't clear whether the lengths in the table is one way or total cable length,


Also the Victron toolkit, the cable length automatically calculates return cable lengths as per

This is in

0-5 m cable length: 4 x 50SQmm 5-10 m cable length: 4 x 95SQmm Cable length stands for the distance between the battery connections and the Quattro connections !!! Recommendations are without other loads in the system and these also should be taken into account for proper main battery, main fuse & main switch cables !!!

I read that statement as a one way distance, it would be helpful if the manual was a little clearer in this respect. a 2.5 M run from battery post to inverter is very challenging in a marine installation... so I am just wanting some clarifications on these recommendations



Marine Electrician, based in Australia

nick-75au asked
Jaco Reinecke answered ·

1 Answer

Can a Victron Multiplus 12/3000/120-50 supply inverter power to both legs on 50 amp RV?

I am trying to decide if I want to buy a simple inverter or an inverter charger for my Bighorn 5th wheel. When I am running on the inverter, I want to supply AC power to both legs of my 50 amp AC panel. will the Victron Multiplus 12/3000/120-50 do this? If so, is there anything special I need to do when installing the unit?

garysclark asked
epuhs answered ·

1 Answer

Cascading 2 Multiplus with two battery banks

Can I feed the second Multiplus into the AC IN of the first multiplus. I do have got 2 different battery banks with individual solar chargers and 2 multiplus. What configuration is suggested?

Is there a possibility to limit the AC OUT from the second multiplus goiong into AC1 from the first one?
(I do not need to get more max AC power out, just using both battery banks )

Thx for helping!

abaco asked
Mark edited ·

2 Answers

Help wiring up Temp Sensor and 2 + leads on BMV-712


I am wiring up my Victron BMV-712

I see in the instructions that the Temp Sensor + needs to plug into B2 on the Shunt, where does the Black wire lead go on the Temp sensor plug into?


OK, I get it ... the original POS Supply Cables are not used because the Temp sensor wire doubles at the POS cable when used.

Bruce Richard asked
bw32056 commented ·

3 Answers

BMV702 Install

When installing the BMV-702, do I leave the negative cable coming from my converter hooked up directly to the negative post on the battery or do I run it through the shunt or does it matter?

mmcclung asked
Matthias Lange - DE answered ·

2 Answers

Battery Bank Connections - What's Best?

I have seen diagrams that show lithium battery banks connected in all three ways shown below. For my install, Option 1 would be easiest.

Are there any meaningful differences between these three methods that make 2 or 3 the preferred choice?


texascharlie asked
jeroend edited ·

2 Answers

Disconnect AC In when battery is charged on Quattro

I want to be able to disconnect the AC in on my quattro when the battery is charged enough to support the load. it is a 15kva quattro with 38.4kw of useable lithium,

David Gould asked
David Gould answered ·

4 Answers

How do I install the Smartshunt with parallel batteries?


What is the correct way to install the smartshunt on my battery bank ?!

I have 2 battery (12v) in parallell, and 2 VE Blue Smart 75/15 charges (synchronize charging)



swordoski asked
pieter-boomsma commented ·

2 Answers

Instalação de um Aerogerador

Olá meus amigos. Tudo bem com todos vocês? Eu espero que sim.
Me chamo Isaac Soares, e gostaria de um auxilio.

Preciso instalar um aerogerador vertical em um inversor de placa fotovoltaica.
Alguém consegue me passar um diagrama de como executar essa instalação?
Desde já eu agradeço e espero contar com essa informação.

Abraços a todos!

isaac asked
isaac commented ·

0 Answers

US Certification for Victron Inverters

I'm trying to figure out if Victron inverters are US certified?

My solar installer is saying he can't use Victron because it won't pass inspection in Washington state (US).

I found the below certificates on victron's site, but my installer says he doesn't see a listing for US or at least one that Washington State recognizes so he can't legally install it.

I sent a mail to Victron to ask for clarification, but figured I might post here as well just in case someone here was able to help figure this out.

Quattro 15kVA Certificate,-5kVA,-8kVA,-10kVA-and-15kVA.pdf

Battery Inverter Certificate,-48-3000-35-50-No.-SAA162783.pdf

oliman asked
halfwalker commented ·

4 Answers

SmartShunt in battery box?

Can my SmartShunt be installed inside my battery box on the tongue of my RV? The battery is lead acid so the box does have ventilation holes. Could I install it inside of a box inside the battery box, if I have room?

sisi asked
Kevin Windrem answered ·

1 Answer

Three Phase off grid and single phase generator

Hi Victron team,

An installer/customer of DPA Solar is designing a 3 phase off grid system (possibly 3 x Quattro 8kVa) and has asked me if a single phase generator can be connected to AC IN on the master? I've read through the tutorial on VE SystemConfigurator and see that a similar example (3 phase gen with single phase shore power) requires 4 Multis.

Do we need 4 Quattros if the customer wants to keep his single phase gen? Or do we tell him to purchase a 3 phase gen?



David asked
pavel-richter commented ·

2 Answers

Supplying solar power to starter battery in a car

I am planning on adding a few 12 Volt accessories (like a small fridge) to my car and wanted to mount a Victron 75/15 MPPT directly to the starter battery as I do not have an auxiliary battery and do not plan on getting one. My intention with this is to allow my 90 AH starter battery to power a few 12 volt electronics when the engine is not working. Is it safe to set up the MPPT with the starter battery? Will my starter battery charge through the alternator (when the engine is running) like it normally would?

vomhorizon asked
vomhorizon commented ·

1 Answer

Is it possible as a customer to get a installation manual, that I can't find online about easysolar 24/3000/70?


In fact I would like to be able to progrès in my installation, without bothering my dealer especially on a Sunday, and I find that it lacks some info for an individual for the connection and config of an easysolar 24V, 3000VA, 70A.

Normally in manuals, we should find features and installation instructions, and the first diagnoses of Troubleshooting

This is the case for the mppt controller and the inverter charger that makes up this easysolar!

But I can't find the right one, for the whole easysolar.

I was on the victron site, the support section...

Which evokes:

1) Manuals

2) Suppliers

3) here ;)

In manual, I find a sub menu that inclues 'easysolar'

I selected it, And nothing about my easysolar 's manuel , but more interesting and technical notions of the rule of 1 to 1 regarding AC coupling, or info on VE, direct and many other things but not the manual I'm looking for (if possible in French)

I also go to see the 'old documentation' section

Nothing found either.

Basically what is specific to the regulator, the charger/ inverter, CCGX that I have the manuals of these sub-elements.

For a regular installer, It's simple!

I hesitated to disassemble the bottom hood where are the circuit breakers ..., on the face of it, it was good to do and for a concrete example:

the connection of the battery (classic lead) :

Or can you find the manual of this circuit board and its elements where you have to connect at half height of this easysolar the cables of the battery

Admittedly to say the least battery is written on the PCB, But for the most two screws could have been possible with a black element between the two (fuse?) for the positive connection.

In new approach to this philosophy victron (which I still like hihi) I remain a little in hesitation, battery connected, the CCGX screen of the easysolar lights up without having to intervene on any button the central button between the lights remaining on off

We don't know for sure if we should continue with settings? I saw that on my Android app a new 'friend' (smart mppt...) was present, so I allowed him the connection and the update proposal, I launched it, then updated it surprised me but maybe it must be incremental, and that went well ...

Logically I was going to continue to cable the entrance photovoltaic panels ... If this screen hadn't lit up on its own.

Finally, the process for installation, and therefore the first commissioning seems incomplete to me with the documents handed over.

Just before I started with the installation of a BMV712, and for this element I followed the installation procedure from A to Z, no doubt, but in terms of the interconnections between the basic elements of the easysolar,

My next Doubt concern the 'ground' markings, on the PCB.

I just have to connect the mass of the case below at the bottom right on the ground socket of the installation or I must also add the points notes ground on the circuit board ?

Well understood that there is a secure management of this next ground connection whether the AC input is connected or not... And I think that must be the right option for France by default.

Finally I think I lack a general manual on the whole of this easysolar.

The wiring documents provided for the multiplus do not mention the peculiarities of this easysolar and the interconnection already wired for most of them.

Thank you for any help on these multiple uncertainties. And especially on the magic link download of the installation manual of this easysolar.

Kind regards

raymond-nicolas asked
JohnC answered ·

1 Answer

Multiplus 3000 Split Phase Voltage Issues


I have two Multiplus 3000's in an RV split phase with 50amp shore power (two legs of 120v power in USA). The units are configured in split phase and are hooked up to a 12v lithium battery bank with 800 amp hours of power (8 batteries in parallel).

I am experiencing a weird issue, where one leg's input voltage from shore will drop down to ~100 volts and the other leg will increase to ~135 volts causing my surge protector to trip briefly then everything resets after 1-2 seconds and the cycle repeats. I've tested in multiple locations and this is occurring in multiple locations so i've ruled out the shore power actually being the issue (i think, open to suggestions but this has occurred in 10 locations. We also just replaced our surge guard transfer switch to check if that would fix or be the cause). The issue seems to occur extremely frequently (every 15 seconds) when running a 1500 watt or more load on either leg. We have tried both dynamic current limit and without and UPS function and without with no noticeable change. When the issue is occurring the units will switch from float to inverter and back in a fraction of a second I think because of unhealthy input voltage. We are running through the system checking for loose wires but don't expect to find anything but will double check.

Everything works fine on battery and when not connected to shore power.

I'm curious if anyone has ever seen this before and if it may be a firmware issue or a result of a split phase configuration issue? We are running the 430 firmware that came with the units and didn't want to upgrade without checking here first if anyone has seen this issue.

epm96 asked
optingoutofnormal commented ·

1 Answer

Not seeing Pylontech US2000B (Battery Monitor) in device list


I have the following equipment installed:

1 x Quattro 48/8000 230V

2 x MPPT Smart Charge Controllers 250/100 MC4

8 x Pylontech US2000B Batteries

1 x Venus GX

The batteries are connected to the Venus through one Can port using the VE Can Cable Type B and the dummy plug is inserted in the other port. However, the Venus isn't recognising the Pylontech, it isn't shown in either the device list for the installation (usually shown under battery monitor) or in the device list section of the remote console.

Can-bus profile is set to Can-Bus BMS (500 kbit/s) and DVCC is enabled. Venus is on firmware 2.31 and Quattro is on 459.

Battery monitor under System Setup is set to Automatic but it appears to have auto selected the Quattro on VE Bus and the BMS is set as Off and doesn't give me the option to change it.

Please help me to enable the Pylontech BMS to act as the battery monitor.


hindssight asked
nemo5 commented ·

3 Answers

Lithium super pack installation to kayak

I have just received my first lithium battery (12V/60Ah lithium super pack) to power electronics at my Hobie fishing kayak. I'd like to place battery under my seat for safety purposes, but in that case it needs to be put in on its side. Manual and Victron tech support just says it needs to be upright, but trying to learn why? In normal circumstances I draw out about 1,5A/hour and recharging can be done in uprigt position. Really wanting to know problems what sideways installation could cause as that placement of battery would be ideal and not making my kayak too bow heavy if battery needs to be added in bow box and increase risk of tripping over in tail waves.

Looking forward to hear your comments about this case.

Antti Kymäläinen, Hobie fishing team, Finland


hullukala asked
hullukala commented ·

1 Answer

3-phase Multiplus II system, am i thinking right?



i am planning a solarsystem whit 3x VE MultiPlus-II 48/3000/35-32 ( se more in picture) for a 3-phase system.

I have made a simple wiring diagram over how i´m planning to set it up, am i thinking right?

- I want a 3-phase, for example the heating system needs 3-phase to work.

- UPS-funktion of the whole household

- i want to use as much solar energy i can for myself, more optimised for winter then summer.

- not designing the system to be optimised to sell as much power i can. not selling at ALL right now.

- want to use ESS, have lead-acid batties right now, planning to upgrade to lithium a.s.a.p.

- yes a electrician will connect it all.

I was just hoping a "victron-guru" could take a look and see if i´m totaly off or just maybe close to actually thinking right :-)

// Jocke

jocke-h asked
jocke-h answered ·

3 Answers

switching between shore power and Multiplus 12/3000

Hi all , looking at building a system with a 12/3000 Multi-plus and battery bank, Question is will I need to build a switch into the system when i hook up to shore power or will the Multi-plus automatically sense shore power is connected and switch its self? and the second part is shore power fails will it auto switch or will i have to manually swithc back ?

stavarda asked
Michael Riley answered ·

3 Answers

240v Split Phase on Boat

Our boat has 50A 120/240v shore power and a 70A 120/240 generator when we are not on shore power, with a gen/shore switch that feeds a standard 120/240 AC breaker panel. I would like to wire an inverter setup inline (passthrough) between the selector switch and AC breaker panel. The boat does not have an isolation transformer. I understand that I will be limited to 50A.

One option connected the selector switch to a 50A breaker, then a 230v inverter (tweaked to 240v), then an autotransformer and then to the AC breaker panel.

The second option uses two 120v inverters stacked, no auto transformer, but inline like option one.

Is this sound? And which of the two options is better? I understand with option 2 the loads will not be balanced, but that is ok, I will not need more than one inverters worth of power. Also, what about grounding?

prometheus asked

0 Answers

2 x quattro 1 boat. Not coupled

Question on grounding and AC safety.

I'm wondering about bonding from chassis of inverters to the negative of the boat. With one inverter this makes sense and is the done thing. But with 2 with a potential for one of them to be inverting (neutral to ground) and the other in pass through (earth is neutral of other inverter or worst case reverse polarity negavite is live!)

Anyone with experience in this set up?.

This boat is set up with 1. 5kva quattro to run essential computer power. and general services from another 5kva quattro. They are not linked.

They have separate battery banks and both supply separate ac panels but share AC ground.

They are fed from either shore power or generator.

mkmarine asked
jwfrary commented ·

1 Answer

delivered system assistance with opening and configuration

Hi, i just got the Victron system delivered. I need to open and configure it. How can i get support from victron?

camillamassacesi asked
ejrossouw answered ·

2 Answers

3 phase Microgrid with Fronius (AC and DC coupled) Output 2

I was wondering how the Output 2 on a Quattro or Multiplus 3 phase micro-grid with Fronius works. If the Fronius is on Output 1, how do the Victron inverters make Output 2 operate? Does it operate as it normally does in a normal three phase installation without Fronius?

james asked

0 Answers

Where is the 100/30 SmartSolar Controller ground connection?

Hi, I am installing an MPPT100/30 Smart Solar charge controller to a small camper trailer. There is no 'earth' as such in the existing wiring as the battery bank of two 100 a/h deep cycles is wired direct to common positive and negative busses. Is it necessary to connect the body of the controller to the negative post of one of the batteries?

mickn asked
Guy Stewart (Victron Community Manager) commented ·

1 Answer

Quattro Parallel Operation

Dear Members,

My first post on the forum and I would be very grateful for any guidance/confirmation that can be provided.

We have just upgraded our boat and the biggest challenge and cost is going to be upgrading the electrical system onboard. I do have a 9.5kva generator and shore power when available. Battery bank is 12V and provides power for all “essential” operational equipment. I intend to provide all other consumers at 220V.

I’ve read that the Quattro’s are capable of parallel operation and intend to upgrade and install 2 x 5000W 12/220 units in parallel providing approximately the same power as the generator and more than normal shore power at 15/30A (I also get a little redundancy if/when issues arise).


· Can I run shore power and split to both Quattro’s? I believe the answer is yes

· Can I run generator and split to both Quattro’s? I believe the answer is yes

· Can I take the 220V output from both Quattro’s and common them up before running the common power supply to my 220V distribution board? The point I need guidance on

Best regards


paul-lannon asked
paul-lannon commented ·

2 Answers

Phoenix Inverter 12/3000 not powering up

I have the Phoenix Inverter 12/3000VA installed into my van. I have got a leisure battery to power the inverter. When I turn the inverter on all 4 LED lights flick on and turn off instantly. I have checked the battery with battery tester, all is ok. Inverter doesn’t power up

struglin asked

0 Answers


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