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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

600V from micro hydro generator, to battery bank?

I plan to add a battery bank to an existing micro hydro system. I would like to parallel 3 of the Victron Quattro 10kVA 120V to take power from the 24kW capacity hydro generator (or a diesel backup generator) to charge the battery bank and feed through / invert to 120V AC for household power. The problem is that the hydro generator produces power at 600V AC whereas the Victron Quattro inverter-chargers will accept only between 90V and 140V AC input. I could put a 600V to 120V step-down transformer between the hydro generator and the Quattros but this would reduce efficiencies.

Is there a way to set up a Victron product to handle the 600V AC output of my hydro generator? Or else is there an inverter-charger on the market that can handle that input voltage directly?

wahlet asked
mt-geek commented ·

0 Answers

Using two battery balancers for 4 parallel strings

I need some help with proper configuration of my victron battery balancers for 4 parallel strings of 24 volts. My set up has a Quattro 5000/24v and eight(8) Trojan SAGM 205 batteries configured in 4 strings of 24 volts (820AH)

I am using two battery balancers, as I read one unit can only balance up to 3 parallel strings. So I have separately connected the midpoints of the first two parallel strings and the next two parallel strings. schematic is below.



chisom-onuegbu asked
Herve RV Nizard answered ·

3 Answers

Parallel operation of new Centaur charger with 10 year old Centaur charger?

I have a 10 year old Centaur 12/30 charger installed on my narrowboat. I want to install a new 12/50 to run in parallel with it (to decrease charge time). Want to know a) If parallel operation is ok? b) would the charge characteristics be the same between old and new models - with different ratings?

paintertype asked

0 Answers

Victron Deep Cycle 12V/200Ah max number in parallel


I often use the Victron Deep Cycle AGM 12V 200Ah battery (telecom style batterie BAT412181164) in a 24V battery bank, consisting of 14 batteries. So 2 Batteries in Series, 7 in parallel. I have no problems with it, works since years perfect.

Now I was told that the maximum number of batteries in parallel is 5. Is this is that true and is there a reason for it? There is nothing written on the Victron product page. There is only the brochure to download, but no manual for this battery.

I am a little concerned because I have planned systems with 10 batteries in parallel for the future.

Best regards and thanks for the help.

offshore asked
warwick commented ·

2 Answers

How to connect Orion-Tr Smart 12/12 30a in parallel

Hi. I have one victron orion-tr 12/12 30a in my van and I'd like to install another to give me 60amps,total charging. Can anyone advice my how I'd need to wire the 2 units many thanks

moonhead911 asked
cpurchas commented ·

3 Answers

Upgrading with a second PV system - What are the possible and valid variants? (Parallel, cascading...)

Hello there!

I would like to propose a game for Victron experts and enthusiasts who are reading this post. Let's imagine we have a typical PV system with panels, batteries, an inverter charger, loads and the presence of the utility grid. If, at some stage, we want to keep the present system (which is not too old, and its size is not small, not too large) and add a second system of similar size or even larger than the first one, what variants or possibilities would be the most optimal/advisable or more advantageous? Which ones would be valid, but not advisable? Which ones are not technically possible? I know it is a bit of an open question, but it would be interesting to read all opinions. Please take it as a game.

As a general guideline the aim is to increase the size of the system, while keeping the original one. Loads should still be supplied in the case of grid failure. Excess energy can be fed or not to the grid (up to you).

If you like you can give opinions based on the following diagrams (I believe they are all self explanatory, but if not please ask). Number 1 is the original system. For the others, in red the system I believe is not possible technically. In purple a system I believe has little benefit, but still possible. In green all other viable possibilities. For these, subindexes 1 and 2 do not mean 'original' and 'new' inverter - please feel free to place every inverter/charger in the position you like.

I know its obvious, but here you have the meaning of each letter (panels, charge regulators and grid-tie inverters are not depicted in the diagrams, in order not to add complexity, but both AC and DC coupling can be considered for any or both of the inverter/chargers).

U stands for Utility grid.

I stands for Inverter/charger (Multi, Quattro)

L stands for Loads

B stands for Battery

And of course please let me know if I am wrong in any of my assumptions!! :)



mm-azimut360 asked
machined answered ·

2 Answers

Should i see 2 batteries in VRM?

I just installed a second BMZ battery to my Victron system. Should I be able to see that the system has 2 batteries somewhere in VRM? Thank you...

pbilka asked
pbilka commented ·

1 Answer

Quattro and MPPT entering absorption and float at different times

The set up is:

2 X Quattro 48V 10000 in parallel

MPPT 170/70 Smart

BMV 712

Any way of syncing them up so that they enter the different charge settings together?

Just seems odd when the Quattros are in absorption and the MPPT is still in Bulk

obo asked

0 Answers

EasySolar-II GX and MultiPlus-II in parallel. Is it correct?

I have paralleled a Multiplus-II to my EasySolar-II GX. I have it working but I’m not sure if it’s 100% correct as I couldn’t get the assistants to work. It’s an off-grid setup with battery charging done by solar and if I need a boost charge I temporarily connect a portable generator. I followed the paralleling tutorial and combined the 2 units via the system configuration tool and all went well. Then it came to the configuration of the 2 units, it all started going wrong when I selected ESS assistant as I have grid code “none”. Then I changed grid code to one of the Australian codes and next I had bus errors, low voltage alarm etc. Pushed ahead and loaded the file into the Multi as well. Couldn’t get the units to output power and bulk/float lights flashing on Multi. Went back in and put grid code back to none and deleted assistant, uploaded both units with this file. EasySolar fired back up but Multi still had mains and inverting lights alternating. Started to pack away so I could work on it again tomorrow and when I got close I could hear the Multi humming. Turns out the system is up and running even though the mains and inverting green lights are alternating on the Multi. I test ran my lathe and it started no problem multiple times. Before the paralleling I couldn’t get the lathe to start at all.

Can anyone confirm if this sounds to be correct or should the lights not be alternating on the Multi?

the-doon asked
the-doon edited ·

0 Answers

bluesmart mppt 75/15 parallel

Für eine temporäre Installation einer Solarladeanlage würde mich interessieren, ob es für den bluesmart MPPT 75/15 ein Problem ist, wenn die Batterieen während des ladens von eienr anderen Quelle zusätzlich geladen werden (Lichtmaschine oder Landanschluss)...

kdietmar asked
Matthias Lange - DE answered ·

1 Answer

Paralleling Li Batteries


I seen a number of references to the number of Li batteries that can be paralleled, either 5 or 10.

Which is correct? Also what is the reason for this number of packs?


kathys asked
Alexandra commented ·

2 Answers

Can I parallel a Quattro and a multiplus of the same size and rating?

Hi there,

I have a Quattro 48/5000/70 and i want to try paralleling it with a multiplus of the same spec,
as I understand it as long as they have the same firmware this should work?

ryan-bernic asked
wkirby answered ·

1 Answer

Help with Overvoltage Error #38 when in ESS

I replaced my solar panels and upgraded to two Victron SmartSolar MPPT 150|100-Tr Solar Charge Controllers. I had two 100/50 controllers previously. The system was and is hooked up with a Victron Multiplus 12/3000/120-50 120V running in ESS. This is all installed in an RV.

Now with the 150/100's, when shore power is plugged in I am seeing the Charge Controllers eventually shut down with error #38 Over Voltage error. This did not happen with the 100/50 controllers. I've made sure that all settings on the controllers and Multiplus are set to a 12 vdc system with 13.6 and 14.4 to be the charge levels for the 400 AH's of BB lithiums I have.

So far my troubleshooting has been:

  1. Shut down and restart system (2-3 times)
  2. Ensured all firmware is latest
  3. Ensured all assistants are the latest
  4. Set Multiplus charge voltages to 13.4 and 14.2 (same error occurs)
  5. Tried un-networking from BMV-712 (same error)
  6. Removed ESS and run with and without shore power
  7. Reinstalled ESS assistant and settings back to original

I'm still getting the #38 error after about 20 minutes on one controllers and then about 5 minutes later on the other charge controller.

Does anyone have any suggestion as to what I should do next?

Thanks in advance

Todd Wackford asked
Todd Wackford edited ·

0 Answers

Bypass wiring in case of pass through failure?

I'm using two Quattro 5000kVA 12/120 inverters in parallel on a boat. I have two questions:

1) Others have experienced pass through failures where the inverter failed and does not pass through either generator or shore power - thus leaving the boat with no AC power options. Would it be wise to wire a bypass so the boat could have generator or shore power incase of inverter failure? (Wiring a bypass seems a bit complicated).

2) In the event of a single inverter failure in a parallel configuration, is there a simple way to revert to a single inverter failover mode? Also, this might inform question 1 because the second inverter's pass through might act as pass through in the event where one inverter failed.

Thanks in advance for any thoughts!


tfmkevin asked

0 Answers

How to connect 12v DC generator in parralel with Smart Solar controller

How to connect 12v DC generator in parralel with Smart Solar 12v to the battery to avoid conflicts during the charging ? Does anyone have drawing ?

denys asked
lklmenterprises commented ·

1 Answer

3-Phase System Wiring


From other brand of invertes I saw he posibilities of combining different sets of Inverters with their own Battery bank (Cluster) to suplly a comond Load. see diagram below.

I have the following requirement for a victron off-grid project Desing:

1-Due to the client needs I cannot create a single big battery bank to supply the load,

2- in stage 1, it is required to have single inverter clusters (Inverters + batteries) of 60 kW, to supply different loads around the country. Then, it is desired to be able to combine at least 3 clusters each of them feeding to a single line in a 3 phase system. as presented in the next diagram:


Additional Information:

1-Battery sets: Lithion Battery of 18.6 kWh and up to 12 parallel integration (222 kWwh).

2- Clusters of 6 Victron 10 kW/120V ( can be configure to a 3 phase system or a single phase depending of the ntegration)

3- Maximum requiered load when combine in a single system 600 kVA, Can be divided in smaller isolated system( Example: 4 X 150kW).


1- I want to know if it is posible to combine for example 3 clusters of 60 kW (each of them feeding a single line : L1, L2 ,L3) for a total output power of 180 kW and a energy storage of 666 KWh?

srobinson asked
srobinson commented ·

1 Answer

80V Leerlaufspannung an MPPT 75/15

Kann ich zwei 24V-Panele in Reihe an einen MPPT 75/15 anschließen? Die theoretische Leerlaufspannung sind dann 80V. Ich sage theoretisch, weil die Module flach montiert werden sollen.

Ist dann überhaupt mit einer so hohen Leerlaufspannung zu rechnen und falls die 80V erreicht werden sollten (sicher nur kurzzeitig), kann der 75/15 das noch vertragen?

Grüße Dirk

megatroniker asked
megatroniker answered ·

2 Answers

3 Phase and/or Parallel with 24/1600 Multiplus and Phoneix Compact


I'm kind of preparing my Vision, and trying to get all the Stuff together that i need.

so Questions popped up for me.

Question 1:

Can i combine the

Plastic-case-Multiplus-1600 <-> Metall-Case-Multiplus-1600 <-> Metall-Case-Phoenix-1600

either in parallel or to a 3 phase combination ?

I know that i have to look up for the "Type "

"All units in one system must be the same type and firmware version, this includes same size, system voltage, and feature set. The type is indicated by the first four digits of the firmware version number. "

So, but how would i know the "Type" before i buy them ? or can i anyway count that no matter what hardware-version i buy i can update them to the same Firmware number.

The Quote does not clearly point out that the same "Type" means it has to be the exact same Product expl. "Phoenix 24-1600"

Its totally clear to me the the different Device have to be the same Woltage and Wattage and all have to own a VE.Bus.

Question 2:

In Case i combine 1 Multiplus with two Phonix in parallel...

...can i use the Charging function on this one single Multiplus in the parallel Combination then ?

greets and Thanks


notger asked

0 Answers

Orion-DC-DC Charger with existing battery parallel switch

Many, if not most motorhomes and boats have a manual house battery parallel switch to help start the engine on a low battery. Would it be a bad idea to short the Orion input and output while it is charging? How will it react? Or will the input breaker trip? Assuming this is undesired, is there a way to use the H and L connections to automatically inhibit charge with the +12V going to the parallel solenoid? (Engine ignition is used to allow Orion to be OFF with zero draw with engine off).

Does anyone know the full logic of connections L and H?

I have read the manual and asked for help from Victron and this forum but had no response.



3dym asked
wildebus commented ·

1 Answer

Parrallel Quattro spurious Overload alarm v465

We have a new set-up (<3 weeks) with two Quattro 8000/200/100/100 24v 230 set-up to run in parallel linked to CCGX and Lynx BMS Control for MG Energy LFP batteries. Both units have been upgraded with v465. CCGX is upgraded to latest release.

Since day one we have spurious L1 Overload on Master Unit and usually concurrent to the event a load buzzing and the Slave unit is appears to be OFF with no fault when fault appear. No overload warning. All the incidents happened in light or no load conditions.

We have witnessed one incident with no load connected to the output of the quattros. The two outputs were cross connected at the time of the incident. We measured current spike between the two unit when this happened. It would seem that either the units are getting out of sync or one of the two unit is short circuiting causing the other unit to overload.

We have replaced the cross connecting Ethernet cable with brand new patch cable with no appreciable improvement.

Any Ideas, suggestions ?

jmarc asked
jwfrary answered ·

2 Answers

Series-Parallel vs Parallel Efficency

Currently I have (3) 100W panels wired in parallel that typically operate in the 17-19v range. During full sun they generate power in the 15-20A range. These are wired into an MPPT 100/50 unit that I purposely over-sized as I expect to grow the array incrementally over time. I have currently chosen the parallel configuration as it seems to have more immunity to partial shading, but I probably incur a penalty during full-sun conversion in terms of efficiency.

Aside from the extra power generated by adding a 4th 100 watt panel, would my full-sun power generation efficiency increase significantly by creating two pairs of series panels (for 34-38v) and then running these two series pairs in parallel? I'm sure the voltage increase would help with any cable losses I might have built into the system. Presently my smallest cable is the 10ga at the panels, but I do have nearly 40ft of 8ga and 6ga flexible copper cabling. The (3) 100W panels are set up as a portable/re-positionable ground array for replentishing (2) series-wired T105 6v deep-cycle golf-cart batteries on my RV. Basically I want to be able to recharge the 30% or so battery capacity that I consumed the previous overnight as fast as the batteries can handle (10% of 225Ah). Maybe someday I'll be able to afford to switch over to Lithium cells, but that will have to wait for now.

Honestly, setting up two separate two-panel arrays might seem like more work, but I think the lighter weight of two hinged panels vs the current three might make things easier to move around. It would also, of course, mean building more cabling and another panel frame mount.

Any relevant wisdom would be greatly appreciated.


BTW, what is it with the spell-checker on this site? I don't think I made up any new words today. It seems to red underline several legitimate words as well as much of the jargon I would expect used on this site....

packrat1969 asked
wildebus answered ·

3 Answers

Syncing MPPT & 150/70 Ve.Can


I still have an issue with a new 250/85 going to float to early. It is in a parallel with a 2 x 150/70s connected with VE.Can. Will I be able to sync these with a GX device ( or Pi running Venus)using the VE.can ports and ? They all Bulk charge together, but the Absorb time on the 250 is not long . The batteries are charging nicely however.

jdm asked

0 Answers

Quattro 48/1000: combining 1 battery bank to 4 quattro's: 3Phase + 1 Single phase

Dear all

Can I expand an existing 3phase Quattro system with 3 quattros 48/10000 and 1 battery bank with an extra single quattro 48/10000 for an extra single phase load connected to the same battery bank.

Thanks for the feedback


fandm asked
jwfrary answered ·

2 Answers

Orion TR smart 12/12 30 inhibit for battery parallel solenoid use?

To use this product on a motorhome with a manual battery parallel solenoid, is there a way to automatically disable the Orion whenever this solenoid is activated (+12V to coil)? I assume running the Orion with input/output shorted is unwanted. The Orion Manual mentions "remote ON/OFF" and "engine detection override", but no inhibit method. Looks like connecting L to +12V might do the job? Can I also use Orion ON by engine ignition +12V at the same time? I need to have orion in stand-by with no draw when engine is off.

Perhaps the logic of connections L and H should be fully explained.

3dym asked

0 Answers

Wire 2 Orion DC-DC Converters in Parallel

I see in the manual for my Orions that up to 5 units can be wired in parallel. I'd like to put two units (70 amps each) in parallel. Can someone look at my wiring plan and let me know if this is correct? Thanks for the help!


miami337 asked
Paul B answered ·

1 Answer

Connecting Multiple Victron SmartSolar MPPT to one Battery Bank

We have a customer who currently has 2 x Victron Smart Solar MPPT Regulators... Both feeding a single battery bank - he also wants to now add a 3rd to the system feeding the same battery bank.

This is only a small system (e.g. MPPT100/15's) - and I know he could just get one large MPPT - however this is not the desired outcome due to different aspects / shading etc.


I have been searching and found that there are a few conversations similar to this however no rock solid answers so I have the questions:

1. Is the functionality available yet (July 2019) for the two (or 3) MPPT Regulators to work efficiently in parallel synchronising their charging algorithms rather than one switching off prematurely?

2. What information do the MPPT Regulators "share" with each other if connected via VE Direct Smart Network?

3. Will VE Direct Smart Network communicate exactly the same as using the Cable? Or are there limitations?

ncpw asked
wingphil answered ·

3 Answers

Paralleled strings of same panels on different orientations

Hi there,

Is it acceptable with Victron MPPTs to install parallel strings of the same module type on different orientations? EG, 3 modules facing west, paralleled with 3 modules facing east, into the same input on the MPPT?

Cheers, Anne

anne-wilson asked
JohnC answered ·

1 Answer

Easysolar 12/1600 install in a van, panel wiring and LiFeYPO4 settings


Bought into Victrons sales speech for Easysolar 12/1600 product for a van project, but it seems some things still remain unanswered. I've read the manual and done the search. This setup will be used year round in different locations, some shaded some not and temperatures will vary mostly between -5 to +25 celsius. I will be living off-grid full time in the vehicle, so i opted for what i believe is a quality product from a European manufacturer, and i really want to like it.

Being that solar power is somewhat of a new option in the energy market (for the average consumer i mean) and it's popularity will grow together with the advance of battery technology. I find that that the manual and available information for a product labeled as Easysolar is lacking. I really think Victron is on to something here, but the documentation needs to be improved.

Ranting aside, to avoid frying my expensive gear and to get this right the first time, i have come here at the fountain of knowledge to be assisted and educated. So please take time to read this post thoroughly.

My setup will be:

Easysolar 12/1600

3x GWL SunnyPoly 165w panels

12v 260ah LiFeYPO4 winston battery with BMS123Smart for monitoring (link is to 200ah battery, otherwise specs should be similar)

Now for the list of actual questions:

1. Series or parallel panel wiring:

-I am under the assumption that parallel wiring would be better for shaded areas, but series better for more challenging conditions. So far I'm going for parallel wiring, will this work? Do i have enough voltage coming out of the paralleled panels to charge my system when in less optimal conditions? Is there a reason i should consider series?

2. If wired parallel, where to connect:

-there are inputs for 3 strings of panels on the Easysolar, is there a difference whether i connect the panels parallel in the roof and come down with one set of connectors and wires or is it better to wire and connect all 3 panels separately? I am inclined to wire them separately just because it would seem more serviceable and more robust to have less connectors and all 3 panels having their own set of cabling all the way from panel to the CC, this make any sense?

3. Inverter/charger settings

-i do not have any kind of color control monitor or such, i only have one VEdirect to usb -cable which i gather is not compatible with the inverter/charger portion of Easysolar but would need a VEbus to usb cable(?). However, when i check the manual page 16 for the table for dip-switch operable voltage settings - there is no setting for lithium batteries to be found at all? What settings do i NEED and HOW to set them now (with either dip-switches or by acquiring the VEbus-cable)?

4. Charge controller settings:

-now this one seems to have a rotary selector for LiFePO4, so that's something that is finally Easy as the name suggests. Apart from flicking the switch to seven is there any additional settings i NEED to change in order to keep my battery healthy? I quess this would be done with the VEdirect to usb cable and a computer then?

5. Is there anything else i need to reconsider before going with this setup?

-i've already acquired the gear mentioned above and will install these in the coming weeks. This will be the single most important aspect of my van, so i would like it to work since it will be a pain in the ass to redo once the project is finished.

Thank you for reading this far, please reply if you have an answer to one of my questions.


mhakulinen asked
Alexandra commented ·

2 Answers

Is it posible to connect on parallel a Phoenix multiplus 24/3000/70 and a multiplus 24/3000/70?

Is it posible to connect on parallel a Phoenix multiplus 24/3000/70 and a multiplus 24/3000/70?

Abel Ivars asked
Abel Ivars commented ·

1 Answer

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