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Inverter system

I purchased this system ( with an additional 170w solar panel. I will be running a cooper and Hunter mini split 12,000 btu at 120v. considering misc items plugged in for charging what size (kw) electric water heater can I get away with. Also the inverter can be switched to put out 240 @ 60Hz. With that being change will I still be able to operate the mini split. I can get additional 100Ah batteries if needed. Please help.

higueyano asked
cleaver rolled back ·

1 Answer

Multiplus in ESS mode aansluiten op Belgisch net voor thuisbatterij.


Ik heb thuis een multiplus II GX aangesloten op het Net met een 10Kw lithium batterij.

Alles in mooi aangesloten zoals het in de manual beschreven staat en het systeem werkt ook gewoon perfect, Maar nu is de keuring langs geweest om het systeem te keuren en dat wilde hij niet doen omdat de omvormer in serie was aangesloten met het electriciteitsnet en niet in parallel. (Ik vertelde hem dat dit systeem enkel maar in serie kan worden aangesloten en dat alle meet apparatuur vanbinnen in de multiplus aanwezig is, en dat dit toestel aan alle veiligheids voorzieningen voldoet en gekeurd is door Synergrid belgie)

Kan iemand mij helpen met info of voorbeelden van iemand anders die dit ook zo gedaan heeft thuis, zodat ik dit kan voorleggen aan de keurder? Of heb ik zelf iets over het hoofd gezien?

In bijlage de schets van hoe het is aangesloten:



Met vriendelijke groeten


aaroncloet asked
janvd commented ·

4 Answers

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

System overview

I would like to put this out to the community to see if I am missing anything in the way I currently have my system wired before I power everything up

12VDC side


I have 10 battleborn lithium batteries divided into two banks interconnected with 4/0 cables.

Each banks positive goes through a 400 amp class t fuse then through a battery disconnect and over to a 1000 amp buss bar.

Each negative goes through a smart shunt and then to a 1000 amp buss bar.

Cables are within inches of being the same length slight variance due to placement of switches

Inverters 2 Multiplus 120v 3000

Each inverter positive and negative go directly to the the buss bars using two 2/0 for both pos and neg

Each inverter casing is grounded to the motorhome chassis local to the inverters

Cables are the same length

Charge controllers 100/50 x 4

Each pair of solar panels go through din rail pos & neg breakers to the PV input on the controllers over 10awg wire. The wire calculator I used was border line 10 or 12 so I went 10

Each output of the controllers battery side goes through a din rail pos & neg breakers then on to the buss bars over 6 awg wire

Charge controller chassis grounds are daisy chained and terminate on the motorhome chassis at the same point as the inverters

Cables are the same length.

Motorhome DC distribution

I am using the existing motorhome 3/0 inverter cables to supply voltage back to the original battery compartment where the original chassis ground is, dc distribution and alternator cables go to.

AC 120v 50amp

AC comes in from either shore power or the generator through the transfer switch over to a double pole 50 amp breaker then the ac is split into two circuits 1 going to each inverter.

AC1 out on each inverter is fed to another 50 amp double pole breaker and then continues to the main AC distribution panel for the motorhome each inverter feeding one leg of that distribution panel

AC cabling is within a couple feet of being the same length. Not sure how critical the symmetry is when running separate legs of the ac panel since the inverters will not share each other’s load.

Is there anything I am missing here?

Thanks Richard

rjoustra asked
Kevin Windrem edited ·

4 Answers

Help Selecting Products

I have a project that requires an off-grid battery storage and inverter solution. I have a 120vac 10amp load that needs to be brought off grid. I don't care which battery config (12vdc, 24vdc, etc.), but if I can manage it, I would like for this entire project to be purchased from one vendor (ie Victron). They only thing I would like to incorporate that I already have is the Yangtze solar panels listed below.

More details:

Load: 120vac, 10amp

Solar Panels:

Calculations I'm using for reference:


tiki1469 asked
Matthias Lange - DE commented ·

1 Answer

Two Multiplus in Three-Phase Grid with two batterie banks

Hi everyone,

Is it possible two use two Multiplus in a three phase system with a seperate battery bank for each Multiplus.

Each battery bank has its own BMS. And should be charged/discharged by its Multiplus individually.

I already have one Multiplus running in a solar setup with ESS and three phase energy meter on the grid. The Multiplus is connected to the Venus GX. It's connected to the first phase on the grid side.

Now I want to add another Multiplus with its own battery bank to have more capacity and redundancy. This shall be connected to the second grid phase.

Can I setup both Multis individually? Will the ESS take into account the two Multis for calculation of phase compensations?

daniel-schenke asked
daniel-schenke commented ·

4 Answers

Prioritize PV Solar over Grid

Hi -

I have an RV and am looking to consume Solar first then the grid or have the Solar off set the grid.

I’ve done research but can’t seem to find clear guidance on how / what needs to be done for my system in order to prioritize Solar over the Grid and would appreciate any help.

My system:

Multi - 3000kva/120v


SmartSolar MPPT 100/50

6 - 100w Panels

440A AGM Batteries - 12v


Overall, I want to offset the grid consumption with any available Solar.


tabney0315 asked
Paul Carmichael edited ·

8 Answers

Solar Box Off-Grid & On-grid

Hello VE community.

I am a solar developer professional but not as technical as I pretend ...
I have a personal project to create a "Solar Portable Box" with Lithium batteries to run amplifier and speakers in remote areas with a MiltiPlus 800VA + SmartSolar 75/15.

If I have no doubts regarding the functionality in "Off-grid" mode, I would like to know if I can :

(1) - Do a rapid charge of the batteries from a wall power outlet without waiting from solar.
(2) - In order to amortize the costs, use the solar box to inject energy (solar + battery) at my place in self-consumption using a wall power outlet of the house. The grid would take the peaks and back-up. I don't want to perform some BTM cabling each week end.

If both of these on-grid modes work, I would really appreciate your support with the AC ports to use and eventual settings to be adjusted (if any).

Thank you very much for your support

hybridromain asked

0 Answers

Do I need a solar regulator with an Orion TR?

I have connected everything according to the instructions. When not connected to the car, the solar is coming in via a voltage relay switch. In the app it's showing 19 volts coming from the solar panel and I'm get the error: 'charging disabled' and 'remote input not activated'.

Am I doing something wrong? Do I need a regulator to bring that voltage from the solar panel down? What am I supposed to do with the jumper?

Help greatly appreciated.



chrisg asked

0 Answers

MultiPlus and source prioritization

I'm planning an installation for a small workshop in a location where grid power is limited (230V/10A). There will be a constant load (heat pump) plus peak loads for a short period of time (say up to 6kW nominal power for a minute or so, when power tools are being used). I would like to supplement the available grid power with batteries for those peak loads.

I found the MultiPlus (48/5000/70-100) and it seems that its PowerAssist feature is exactly what I need. So far so good.

But — I could also add a small amount of solar to the mix. And that's where I don't understand things anymore.

Ideally, I'd like this ordering of power sources:

1. Use as much solar as is available at the moment.

2. Use the AC grid connection to pull up to 10A.

3. Use the batteries for anything on top of that.

But it seems that the MultiPlus does not have a separate DC connection for a solar power source. I found a system example ( which is fairly close to what I want, but it seems that the output of the MPPT controller is connected directly to the batteries. It seems to me that in this system, if I configure the PowerAssist feature, the solar source can only supplement battery charging and supplement the power peaks over the 10A I can pull from the grid, but it can't participate in small loads if the batteries are fully charged?

I would like to avoid discharging the batteries as much as possible, to extend their lifetime. They should be used only for supplementing peak power above what grid+solar can supply at the moment.

Additionally, I do not understand this example: I thought batteries need to be charged according to a charging profile, and it seems like there are two chargers connected to the same batteries. How does one ensure proper charging?

I think what I was expecting was an inverter/charger with separate connections for battery and for DC in (from solar/wind), with source prioritization.

Can this kind of prioritization be done with the MultiPlus?

jwr asked
alan edited ·

1 Answer

Victron QUATTRO 48/5000VA with SMA 5000TL Inverter in Island mode

Hi, I have an existing grid-tied SMA inverter (SMA 5000TL) and 2 strings of 13 panels for total of 6.5kW. I want to add storage and am considering the QUATTRO with 4 x Pylontech US3000 batteries (@48V nom).

The main aim of the exercise is to be self-sufficient in case of extended/indefinate grid outage. I am no expert, but my reading suggests that the Victron QUATTRO would provide a mini-grid on the AC-OUT-1 and that the SMA solar inverter would run 'normally' on this channel regardless of whether the grid was connected or not.

Assuming that the above is correct, would the SMA inverter connected in this way be a stable and reliable configuration. I ask this because I have read some posts/articles that indicate that there are situations where the inverter may go over-voltage and shutdown the QUATTRO.

Is this a potential problem, and what would be the recommended way to deal with this?

Note, the loads would include 1000W and 1500W pumps (bore pump etc), inverter aircon, fridges and freezers, lighting and misc.

thank you,


rrroonn asked
chrisallo commented ·

3 Answers

Japanese RV Build— Stuck on Bulk / Configuration Review

Hey Folks,

Appreciate you stopping by. I’m new to this area, but I’ve done a bit of research to solution for various other issues.. That said, i now am a bit stumped and would appreciate some help.

Background on my set up:

  • 180w NewPowa solar panel x2 (Run in parallel & Fully tested before and after install)
  • Victron MPPT Controler 100| 30
  • Battle Born LiFePO4 (lithium) 100Ah 12v battery x3 (total 300Ah) run in parallel
  • Victron BMV 712 Smart Monitor

Configuration for Victron systems:

Pictured below are my key setting configurations for my set up. I used the manual as well as some other threads to determine my settings.

Settings for the 100| 30 Controler :


Settings for the 712 Smart Monitor:



  1. Based on my Whole electric system, does my configuration above seem to be accurate or are there pieces that I should re-evaluate?
  2. Today and yesterday (during the day) my system has been stuck in ”Bulk”, which from what I read, means that the batteries are low and the system will bring in large amounts of power to charge them. The issue is that the batteries are very close to being fully charged. (below is some data from the app showing that I’m stuck on float) . I think its important to point out that I have been able to put a load on this and see my numbers and battery voltage adjust but I continue to stay in “bulk” . What could be causing this?



  3. Possibly related to #2, today during a sunny day, my solar panels were barely bringing in any watts 30-50w range, while in bulk model. My battery on the monitor was at 95% or 13.4v but it didnt seem like it was going up at all. Any reason why this was happening?

Any help is greatly appreciate. Happy to provide more details around certain aspects.

Here are some additional data grabs...

Below is a picture from the monitor today while having a slight load on it (fan, heater, lights):


Here’s a picture of the van when I bought it.. It’s changed a lottttt since then.


coleinavan asked
coleinavan commented ·

3 Answers

Bluesolar MPPT 100/50 limiting output



I just installed my Victron system. I have the multi 3000 with a smart dongle, smart solar 100/50 mppt, 1000amp smart shunt, and 420ah of safari ut 1300 lithium’s. Up top I have 4 200w panels wired in series parallel dumping 45ish volts and 25ish amps into the mppt, but coming out to the batteries at the terminals on the mppt, it’s on 8ish amps. Not sure if my setting are off? I’ve googled until my fingers are raw.

samuelpross asked
Matthias Lange - DE edited ·

1 Answer

Victron 90Ah battery no longer holding charge

First solar installation! Uses MPPT 75/15 solar controller and Victron 90Ah gel battery. After two summers, the batter is no longer holding charge. Is this normal life time for this battery?

borgnetoplombe asked
Guy Stewart (Victron Community Manager) answered ·

1 Answer

Tiny House solar off-grid installation with 30Amp shore/generator backup


Am about to embark on deploying a Tiny House for off-grid. I've built the Tiny house based on an RV design. Major appliances, like On-demand hot water heater, 3-way fridge/freezer, 3-burner oven/stove, propane heater are all driven by LPG, Lights, Ceiling fan, and USB charging ports are all 12v based. Utilize a Natures Head composting toilet which requires small amount of 12v to drive a small exhaust fan.

The Tiny House was built with a Power Dynamics Power Distribution Center (PD4045LIKA), 30AMP input. So all 120V outlets and 12Vdc circuits are wired to through this unit. The PD4045 is a Converter/Charger and I have disconnected the circuitry for these, as the Victron MultiPlus Compact 12v/2000/80 I have installed will feed the AC and DC side of the PD4045 and also charge my lithium batteries.

As I'm not a Pro am looking for any advice/recommendations with regards to this setup.




mattbratt asked
klim8skeptic answered ·

1 Answer

150/35 MPPT 10 khz noise

Hello guys,

I have installed a 150/35 MPPT Smart Solar charger in my van and it is driving me crazy with the noise it produces. Once I disconnect the solar panels, the noise is gone.


Is this normal, something I have to live with or is there anything that can be done?

Thank you

sandmac asked
marv21 commented ·

4 Answers

Solar panel confusion

Hello, I am looking for advice regarding updating my current solar panel setup on my leisure vehicle.

Currently I have a single 80w panel and a Victron 75/10 controller. With weight on the roof being the constraint, I think I have three options:

  1. Add another 80w panel and wire them in series to take into account the factory wiring, using the current controller
  2. Add another 80w panel and wire them in parallel but update the factory wiring, using the current controller
  3. Remove the 80w and install a 100/20 controller, update the wiring and a 200w panel (being the max size/weight I could install)

What do you think would give me best yield, all year round in the UK?

Many thanks for looking.

harrib0 asked
wkirby answered ·

1 Answer

Inverter feed-in limiter only cycling

Hey everyone,

I noticed with the recent ESS update the inclusion of a "new feed-in limiter". Woah-and-behold, there is a seeting in my CCGX for max watts feed-in!

Previously, I've just had a current limit set-up that when feed-in starts to exceed, the inverter drops ALL feed-in momentarily. What I wanted however was a more dynamic reduction of the MPPTs.

I was hoping this new setting would do just that, limit the incoming PV to reduce my feed-in such that it regulates at the set-point (if it is able to exceed it).

It seems however it does the same thing, just dropping all PV momentarily, then ramping back up. Cycling over and over.

Is this how this is intended to work? Certainly not ideal as I suspect the load fluctuations are putting unneeded stress on my setup.

For reference my system is as follows:

Quattro 10KVA (VE.Bus),

2x victron 150x45 MPPTs (,

victron BMV ( i think),


Would be grateful for any advice! :)

andyandy26 asked
andyandy26 commented ·

1 Answer

Laderegler MPPT 100/15 lädt nicht. Float Zustand.


Ich habe folgendes Problem und auch in den anderen Feeds leider keine passende Antwort gefunden.
auf dem Dach unseres Wohnmobils sind zwei baugleiche Solarpanele mit 110 Watt verbaut. Wir betreiben dazu den Victron Laderegler MPPT 100/15.

leider zeigt dieser immer nur eine Lading von 0 Watt im Zustand Float an. Und dies auch unter Berücksichtigung der 5 Watt Differenz.
- Batteriespannung: 13,42

- PV: bsp. 20,41

Auch zeigt die Batteriespannung bei einer Messung an der Batterie lediglich eine Spannung von 12,9. wie kommt es zu solchen Abweichungen und wieso lädt der Regler nicht?



lara asked
Matthias Lange - DE answered ·

1 Answer

Can I connect my MPPT Load Out to 12 DC 600w water heater element?

Hi Victron Community,

I want to convert my AC water heater to DC.

Can I connect my 12VDC 600 water heater element to the Load Out on my MPPT Solar Controller to run only when my batteries are full?

Here is my setup:

2 x 375w panels connected to a Victron MPPT SMART 150/60

2 x 175w panels connect to a Victron MPPT SMART 100/30

This is going into my LifePo4 bank 4 x 120ah.

Whats are your thought on programming the two MPPT Load Outputs to act like a dump loads from excess energy created my when batteries are full?

I can put two elements into my tank so have two separate heating elements with thermostats.

marcus-cp asked
Matthias Lange - DE answered ·

1 Answer

Mppt 100/20. Not registering solar.

I'm trying connect my 260ah AGM battery and 320w solar panel to my mppt 100/20. It registers the battery but I have 0w and 0v from the solar. I've triple checked the wires are connected properly and the right way round. I've checked the fuse and I've checked the wiring using a multi meter and there is power coming from the panel but the controller still isn't recognising it.

I'm aware it needs +5v above battery voltage to charge but I'd have through midday on a sunny day it would produce that easily.

What am I doing wrong? Anyone got any thing else I can try?

Thanks in advance.

ktillman79 asked
launacorp answered ·

1 Answer

High voltage on MPPT 75/15 battery output, when BMS closes due to temperature

Dear all,

I try to figure out, if the behaviour I see is per design or not. In my van I have installed a Victron LifePo4, a BMS12/200 and a MPPT75/15 with 2x110W solar panels. Due to the current cold weather conditions (<5°C), the battery and the BMS shutdown the battery charging.

Whenever there is sun available, the voltage on my BMS load and the MPPT battery output increase to ~17V. I assume this is due to the battery shutdown for charging. As soon, as the battery is open (>5°C), the voltage decreases to a normal level.

Is that expected? I thought the MPPT will reduce somehow the voltage when there is no charging in progress.

Why I am asking the question? If put the MPPT battery charging minus on the BMS load pin, where all my other load is also connected to. Now I have ~17V on all my devices, as long as the battery is shutdown. Is my design correct or do I need to change something?

best regards,


fabian-pagel asked
petajoule commented ·

5 Answers

Solar Production Example

Hi all, I am taking a stab in the dark but was hoping someone in the community might be able to help.

I am looking into installing some solar panels with my system and would like to get a real idea of how much of a difference it has made for other users.

I am based in Pretoria and essentially would like to get some solar data from someone's installation so I can look at how effective it was/is.

I dont know if anyone is comfortable to send me anything, but it would be greatly appreciated and would help me ever so much. A CSV would be ideal but at this stage, I would take anything.

Regards Ewald

ewalderasmus asked
ewalderasmus commented ·

1 Answer

panels series

can i series 4 x 55W and one 90w into a 48V MTTP? or will the 90 W stop the 4 others

Tim Dennehy asked
JohnC answered ·

1 Answer

Solar dealer / maintenance in the east midlands

A friend who is not very tech savvy has a problem with his solar system. I gather his dealer went bust and the people the administrators passed him to say they can’t help because his system is non residential. Can anyone pass me the details of someone in the East Midlands (Bilsthorpe) area that we can get to come out and have a look at the system?

kimphil asked
wkirby answered ·

1 Answer

Victron 100/30 Voltage Settings for Winner Solar SMF


i have two Winner W280S (280Ah) as a Strip to get 24V for my inverter. Now i want to make a Profile for the correct Voltages for charging them both. Here are the voltages that Winner says they should be:

- Bulk 14,8V

- Absorption 15,4V

- Float 13,7V

so, i think i take them all as 2x. But whitch one is the right one in the profile? There i have:

- Absorption Voltage

- Float Voltage should be 27,4V

- Equalisation Voltage

Thanks a lot for your help!



solalasolar asked
solalasolar commented ·

2 Answers

Smart solar 150/100 bulk blinking

Hi, I have a 1200 Watt solar system connected to a victron smart solar 150/100. I'm standing in full summer heat but I only get 700-800 watts. Now I saw blue bulk light is blinking once every 3 seconds which means charging is disabled? But it's charging, just not how it should. I restarted the mppt and measured my solar input, its 120 volts how it should be. My lithium batterys are only 70%full which my bmv 712 is telling my solar over victron smart network. Anyone got a idea?

steven-mailer asked
Paul B answered ·

1 Answer

VRM solar temperature source

Under “System Status in VRM” in the “Solar Yield” quadrant/box of the dashboard there is a temperature number listed there.

Where is that temp sourced from?

Directly from MPPT controllers? If so, which one if multiple?

Area temperature based on weather reporting and stated location of site in VRM?



geomz asked
ghostrider commented ·

3 Answers

Disconnecting solar panel

I want to disconnect my 200 watt solar panel during the upcoming hurricane. I have a Victron mppt 75/15 controller. Is there anything I should do before disconnecting and reconnecting the solar panel? Thanks

jimb asked
Guy Stewart (Victron Community Manager) answered ·

2 Answers

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