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

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 commented ·

4 Answers

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

MPPT + Smart Chargers

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

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

bora asked
snoobler answered ·

1 Answer

Two MPPT on one solar string possible?

A customer asked me the question if its possible to connect two SmartSolar MPPT`s to one string of 3 parallel PV-Panels.
The reason behind is, there are two diffrent type of Batteries (one bank is Lead-Acid Battery, the other is a LiFePO4 Battery).

He would like to charge both with the same Solar Array.

Is this possible?

Tanks for your Help.


profidurium asked
Trina answered ·

3 Answers

Solarregler 75/15 lädt nicht

solar Regler mit Dongle, die grüne Diode blinkt nur. Vom Panel kommen 18,7 V! Batterie 12,6 V

keine Ladung


pommes asked
hotte1973 edited ·

9 Answers

Suddenly MPPT 100/30 sending PV voltage to battery but no current

I set up a 12v system in a camper van over a year and a half ago with a 175w solar panel, SmartSolar MPPT 100/30 controller, BMV-712, and a 50ah Battleborn. Ran great with no problems. Two months ago I added another 50ah battery in parallel, ran great with no problems. It has been very hot recently and temps have been getting over 120 F in the van when parked. I started to notice that my vent fan was beeping, but didn't think much of it until my fridge had completely shut off but my lights still worked. I then noticed that the charge history showed my battery's voltage maxing out at over 20v for a week and that that no watts from solar charging were recorded for the previous 5 days.

My charge controller just keeps showing the flashing bulk light indicating "no charge". Even in full sunlight with my panel's vmax coming through, but no current or power according to the charge controller app. Strange thing is that the unregulated panel voltage seems to be making it past the charge controller. If disconnect the panels and charge controller, the battery voltage will eventually stabilize. I am assuming the BMS on my batteries has kicked in to stop charging, but my loads must have been getting the PV voltage direct. Hence the fan beeping and turned off fridge.

Other weird part it that in direct sunlight, my battery monitor will register watts coming in but the charge controller wont and maintains the flashing bulk light. In full sunlight, the BMV will record 21v. I have a breaker between PV panels - charge controller and charge controller - positive bus bar. Testing voltage on both sides of breakers and they seem to be functioning properly. Not sure if high temps could have done this, but my system has functioned without issue for a while prior to this.

Any help would be appreciated.

zachary-green asked

0 Answers

Victron 3000, 30 amps vs. 50 amps, Shore vs. Solar, Batteries not charging when off, of course

New to the group. To lay the groundwork for the question:

  • We have a 50 amp fifth wheel.
  • We bought the unit used from a private seller, very happy overall.
  • The solar / Victron was installed by the seller or he had it done.
  • We have 4x Battle Born 100ah LifePo4, 4x 190W solar panels, 2x MPPT, SmartBMV and the Victron 12/3000/120-50
  • We (the wife, the dog and I) are fulltimers, three months now!

We have been, in the past three months, mostly on shore power, and always on (confirmed) 50 amps. We found that one of the monitor panels (not listed above) showed us at 30 amps continually. Reached out to seller, he indicated that if I had the inverter on, I'd be limited to 30 amps. Turned it to Off, and I'm back to 50 amps and I can run the air conditioners. Excellent for the Texas heat we'd been dealing with.

Two days ago, we relocated to a park, and were fortunate enough to park in the shade. Sure, solar will be very much reduced, but that's okay: we have 50 amps.

Tonight...the generator kicked on. Turns out we ran down the batteries to 50%. Direct DC usage in the rig, like lights, whatever else is straight DC, ran them down. With the Victron set to off, the shore power doesn't recharge the batteries. If I turn the Victron to just "Charger" (not Inverter), it will recharge the batteries, but I will still be limited to a 30 amp system.

This feels wrong to me. I'm a programmer, have been for 30 years. I'm decent at debugging, but I haven't examined all the the wiring and gotten a deeper understanding of the layout. It just feels wrong that it's this way.

When we have good sun, the batteries always get charged up the next day, even on cloudy days. We've been here, in the shade, for... two full days, I think.

I'm trying to determine if one or more of the following are true:

  • Is this a standard solar implementation scenario? That there is only ONE possible charger/converter to replenish the batteries installed at one time?
  • Is there a possible wiring / schematic / system design oversight or bug. (I don't have a schematic yet, I have reached out to get one, if available.)
  • There would have been an original charger/converter installed on the rig, before the Victron, etc. was installed. Does anyone ever have that still wired into the system?
  • Really, my only choices are "have sun" or "be limited to 30 amps even when 50 amp shore power is available"? This cannot be right.

I'm trying to determine that, if the Victron being on limits me to 30 amps, is there a different way to charge the batteries when on shore power? I know my question might be difficult to many without y'all knowing more about how it's wired up. But I'm hoping I kept my questions as free of the implementation as possible and focused on generalizations, and typical scenarios.

For the moment, there's a chill coming into the area tonight and I don't need two A/C's. I'm okay with the 30 amps for now, and I'll get my batteries replenished. Not a long term solution.

I truly appreciate any help anyone can put forth, or any education I can glean out of your answers. I did do extensive research into solar, DC, AC, converters/chargers, inverters, MPPT, etc. before we bought the rig. I feel sort of comfortable in my general knowledge. I was a little sad I didn't get to do the install myself so I'd REALLY know it, inside and out, but the deal was just too good to pass up and our seller was a pleasure to work with. But I lack the intimate knowledge that installing it myself would have gained.

Thanks in advance for any assistance.

- Will B.
Somewhere in Kansas at the moment.

captainpalapa asked
captainpalapa answered ·

2 Answers

Multiplus or Multigrid for off-grid

Hello, I had a question about Multiplus and Multigrid. I am building a small off-grid system with 4 solar panels off 300 watts each that will charge battery's using an MPPT charge controller. I also want a backup generator to charge the battery's if they get under a certain level, and I will be using an inverter to make 230VAC 50Hz from the battery bank. At least I am also using a wind turbine that will give me a peak of 600 watt.

So a short list of items.

- 6x Solar panel 300 watt

- Battery bank

- Multiplus or Multigrid?

- Inverter

- Backup generator

What will be the right choice? Multiplus or multigrid.

And is this a realistic setup? Or is there a more efficient way?

mike-schoonen asked
nick-wiggill edited ·

3 Answers