Is it possible to charge a battery with a Orion Smart TR 12/12-30 wich is not connectet to a alternator but to a 12v DC-Charger? Second question (if its possible) would be: What if the 12v DC-Charger can only provide 20a?

I installed a Orion Smart TR 12/12-30 in my rv and was asking myself if can charge the battery while not driving by simply connecting a DC-charger to the input of the Orion.

andreass asked
d-winterburn edited ·

2 Answers

Monitoring suggestion: Cerbo GX vs (MK3-UB plus VE.BUS Smart Dongle plus Smart Battery Sense)?


I am narrowing down to an overall system design for my RV that will consist mainly of the following components:

+ MultiPlus Compact 12/2000/80

+ SmartSolar (or BlueSolar) MPPT 100/20 (12/24V-20A)

+ NoName - Lithium Iron Phosphate Battery 12V 200Ah with active BMS

The end result should be monitorable and configurable from an iPhone or Mac. As far as possible I would like avoiding the installation of control panels for this time being.

Also, the system should take in care of both leisure and starting battery charging and status.

I had in mind 2 solutions:

A) Point to point - Accessed/Managed only with VictronConnect

+ MultiPlus Compact 12/2000/80

- Accessory: MK3-USB interface (for cable configuration/monitoring on Mac i.e grid current limit)

- Accessory: VE.Bus Smart Dongle (for Bluetooth monitoring of the Inverter/Charger/Battery on iOS and Mac)

+ SmartSolar MPPT 100/20 (12/24V-20A)

- Accessory: Smart Battery Sense (for propert charging and Bluetooth monitoring of the MPPT/Battery on iOS and Mac)

- NoName - Lithium Iron Phosphate Battery 12V 200Ah with active BMS

- Accessory: ?

B) Centrally coordinated - Accessed/Managed with VictronConnect/VRM

+ Addition: Cerbo GX

+ MultiPlus Compact 12/2000/80

- Accessory: VE.Bus Cable Connection to Cerbo GX

+ BlueSolar MPPT 100/20 (12/24V-20A)

- Accessory: Ve.Direct Cable Connection to Cerbo GX

+ NoName - Lithium Iron Phosphate Battery 12V 200Ah with active BMS

- Accessory: ? Some kind of connection to Cerbo GX

There is an evident extra expense for the Cerbo GX, at the same time it looks like I am saving using a BlueSolar instead of SmartSolar and also not needing a VE.Bus Smart Dongle and Smart Battery Sense

There is a gain i ncentral management and expansion possibility using the Cerbo GX also being able to connect it to tank levels monitoring and so on.

I am in doubt of the following:

is the MK3-USB interface is still needed to program the MultiPlus ?

How should the leisure 200 Ah be managed from the Cerbo GX?

How should the starter battery be managed from the Cerbvo GX

Are there missing components in the picture?

Any expert eager to comment on the two a) b) setup and maybe pointing out missing pieces? (like shunts, bms, lynx distributor..) .I am also concerned in how much the managing system (Cerbo GX) would consume.


amidships asked
amidships edited ·

0 Answers

VE.Bus BMS and MultiPlus / Cerbo combination

I have wanted to be able to control the Multiplus via the Cerbo, but the VE.Bus BMS and VE.Bus BMS Assistant on the Multiplus block the Cerbo from changing the invert state between On / Off / Invert Only / Charge Only.

Having done some testing I have reverted to the 2-Wire BMS assistant on the Multiplus and wired the VE.Bus BMS Charge Disconnect to the Aux 1 port and Pre-Alarm to Aux 2, using an Inverting remote on-off cable. I am now able to change the status of the Multiplus from within the Cerbo Screens. The Cerbo correctly shows the VE.Bus BMS status through the relevant MultiPlus screen. Both disconnected at the moment.


I also had a VE.Bus Smart Dongle and found I could modify the status of the Multiplus via my phone as well. When status changed the Cerbo reflected that changed status. So I have a system working as I would like, but not using any functionality of the VE.Bus. I guess I could have achieved the same thing using the smallBMS with pre-alarm.

What I was wondering is if anyone can advise what functionality I might have lost by disconnecting the VE.Bus BMS from the VE.Bus?

I have noticed during my testing today that there is no Alarm or Error that is logged when the VE.Bus BMS signals load or charge disconnect, simulated by disconnecting the signal. The Cerbo clearly isn't triggering on the change of the Multiplus VE.Bus BMS status. I am not sure if it ever did alarm/alert when the VE.Bus BMS was connected via the VE.Bus port to know if I lost functionality. I do know a few weeks back I had a VE.Bus BMS Charge disconnect event and never saw anything on the Cerbo.

Hope people find this useful and it would be good to understand what functionality has been lost by taking this approach and not have the VE.Bus BMS communicating on the bus.

bathnm asked
bathnm commented ·

0 Answers

BMS 12/200 and mppt connection

Hello, is it correct to connect the negative MPPT with the alternator to the AB socket of the BMS? this in order to also recharge the starter battery with the MPPT? thanks for your answer.

vince2711 asked

0 Answers

Usage of assistants for programmable inputs, outputs, AC Out 2 etc.

I'm trying to learn more about how assistants work and how they can be programmed to do various things without a GX panel (just a plain simple Multiplus II 48/3000). Like taking inputs or giving outputs via the various green terminals, and by controlling when or when not to use AC Out 2.

I have thought of a few scenarios that can be useful which I wonder if can be achieved, and wonder if someone can point me in the right direction:

Usage scenario 1: Switch off all loads, and run only refrigerator in search mode.

I have a solar powered cabin where I turn off all loads when I leave but want to be able to run the fridge in "search mode" when leaving. I am wondering if this can be achieved by connecting just the refrigerator to AC Out 1, and the rest of the cabins loads to AC Out 2, with an external switch to switch between "present mode" (AC out 1 & 2 outputs on, without search mode) or "refrigerator mode" (only AC out 1 enabled, in search mode to save power)

Usage scenario 2: Disconnect unneeded loads like hot water tank during peak usage to prevent overload.

Since the multiplus can take some overload before it shuts down, I'm thinking that it may be possible to shut down some non-essential loads once an overload is detected, to prevent a shutdown. For example if there is a hot water tank connected to AC out 2, and someone powers up a high power load (like a kettle, hairdryer, vacuum etc) on AC out 1, it disconnects the hot water tank from AC out 2 when an overload is detected, then reconnects once the load returns to normal to prevent shutdown due to overloads.

Usage scenario 3: Switch on or off based on input from a charge controller

For example when the batteries are full, or when there is sufficient sunlight to power the inverter "directly" from solar without draining the battery, it could be nice to switch the inverter on to power some "dump loads"

freesurfer asked
Alexandra answered ·

1 Answer

Smart Sense connection with existing shunt

I have 2 existing 75/15 MPPT controllers and a BMV 702 , I am fitting a Smart Sense . I have an existing shunt and my intention is to install the -v connection line before the shunt goes to the battery and not on the battery terminal . Is this correct?

lucy-laika asked
ess-and-solar-solutions answered ·

1 Answer

Cerbo GX dead after update to 2.60


I am reading here already for a long time but now my first question.

I have a new Cerbo GX since yesterday,everything was ok but after the update to 2.60 nothing works.

I have no access any more,the wifi led is orange,sometimes blinking or off or steady ?

The bluetooth led never lights any more.

I tried the reset button,and try to connect by cable to my router nothing helps.

Any ideas ?

Regards Eric

liopleuredon asked
liopleuredon answered ·

2 Answers

Doubling up battery connections for Quattro install

Getting ready to install a 12v quattro system with 6 batleborn batteries via a Lynx shunt and distributor. I see that the Quatto calls for the 12v inputs to be doubled- should the 4/0 cable be doubled all the way to the battery connection points, or just coming from the Lynx to the Quattro?,

pau-hana asked
jwfrary answered ·

1 Answer

Wiring MPPT to Perko battery Selector switch to charge 2 batteries

Trying to set up solar on my sailboat. I have 2 12v batteries which are currently set up to be charged either by 110 shore power or the engine alternator, which goes to a Perko 1/2/ALL/Off selector switch.

My solar set up will be a 175W Renology panel, and the Victron 75/15 MPPT controller.

I'm trying to set it up so the panel/mppt would charge both batteries. Rather than get the Victron battery combiner or a separate ACR, i'm wondering if i can just connect the MPPT battery wire to the Perko selector switch where the alternator is currently connected. Any pros/cons to this type of set up?

My thinking is that the selector switch is basically a manual ACR, so it would simplify things if i didn't need an extra.

Attached is a diagram of how i'm envisioning this.

Thank you!


erikdane asked
randy-putnam answered ·

1 Answer

How does VRM data deal with energy from a wind generator?

I have observed that on windy days my VRM generally reports fairly high PV yield. I was wondering if the output from my wind turbine is getting added to the energy of the solar panels in the VRM reports?

Tim Chapman asked
Tim Chapman commented ·

0 Answers

Blue Smart IP22 Charger: No characteristic absorption curve


I need your help. I have a problem with my Blue Smart IP22 Charger 12/15.

The charger should charge a lithium battery (4 x Winston cells). I have set the absorption voltage to 14.2 Volt. The highest cell is at 3,568V. So there is no OVP situation.

In the absorption phase the current should drops at constant voltage: But after about five minutes, the current and voltage jump wildly up and down in the absorption phase.


What is the reason for this behavior and why doesn't the current simply drop further towards 0?

Thank you very much.

Best regards


felixsteinbeis asked
felixsteinbeis commented ·

0 Answers

How to connect MPPT with Battery Protect and Battery Monitor?

my battery has a Smart Battery Protect attached to its positive side and a BMV-712 battery monitor shunt attached to its negative side.

where do I connect the battery ports of my solar panel MPPT 100/20? should it connect directly to the battery, ie « inside » the other two devices? Or outside them? Or inside on one side and outside on the other?

in other words:

1- should the positive wire be connected to the positive battery connector or the Smart Battery Protect?

2- should the negative wire be connected to the negative battery connector or to the battery monitor shunt?


jdmuys asked
jdmuys answered ·

3 Answers

MultiPlus AC-Out-2 doesn't disconnect on Inverter mode/mains failure

When there's Mains failure and the Multiplus is running on battery (Inverter mode) the AC-Out-2 doesn't disconnect the load. The manual says otherwise.

How can I resolve this issue?

MultiPlus 24/3000/70-50

FW ver. 422

dannypm asked
dannypm answered ·

5 Answers

Do we need to put a fuse on the positive side of the battery?


So I was wondering if we always have to put a fuse on the battery (positive side) or not.

alexander asked
Paul B edited ·

2 Answers

How to add temperature readings to remote console.

I am using two temperature sensors to monitor the engine cooling water temperature, and need to see the readings on the remote console, as they are obviously very important. Is there an easy way to do this ?

vincefarrar asked
Paul B edited ·

2 Answers

Victron MultiPlus C12/2000/80-30 stops loading

Hello Victron Community

I'm operating a Victron MultiPlus C12/2000/80-30 in my campervan.

It's a new device which was installed 6 weeks ago.

My use case is, that I usually park the van in a garage on Sunday evenings, plug the van into the normal grid, the charger starts working in bulk mode and charges the battery. All as it should be.

Now comes Saturday morning, I return to the van after a working week has passed, and the battery capacity (240Ah Li) is on 75% and the charger does not charge the battery any more.

Only when I swich the charger off and on again on the remote control panel, the MultiPlus will start charging again.

I repeated this several weeks now and the pattern is stable. It's always the same percentage battery load left an the charger does not charge any longer.

I suspect that the charger loads the battery just fine up to 100% (which I have seen at an intermediate control visit) and then switches itself off after some time but always at the same time after the battery was fully charged - hence the stable 75% value of battery load when I come back to the van.

Also, I think that it must be the MultiPlus itself that consumes the 25% battery load in the meantime as there are no other devices running except from the display of the Battery monitor and the display of the heating system.

Why does the MultiPlus stop charging the battery after some time and why does it consume energy?

I'd be extremely grateful for any hints!

Many thanks, Markus

markus-power asked
Paul B edited ·

1 Answer

Multiplus 24/3000 disconnects Onan 4k generator


Similar to several other customers, I am having trouble getting my Multiplus to accept AC input from my generator.

I have the 24/3000 w/ a single AC input. No problem when connected to Mains/Grid, but when I am off grid, and power up the Onan 4k generator, the Multiplus continuously connects the input and then disables it (over and over).

Reading the AC input data (thru Venus GX or Mk3-USB), it would appear that both voltage and frequency are well within limits. When I bypass the Multiplus, the generator comfortably supplies sufficient power to the Forest River motorhome.

In accordance with available guidance, I have attempted to:

-disable UPS mode

-enable DCC

-enable Weak AC

-lower maximum input current (generator should be capable of 30a continuous on 120V)

Thank you in advance for any advice you could offer.


roblamo asked
jwfrary commented ·

2 Answers

Wifi issue with a 48/3000 EasySolar-II not connecting

An installation I did a few months ago has developed a problem which I’m hoping someone here might have a solution to.

The firmware in all components of the ES-II were updated to current prior to installation.
WiFi is via hotspot on the customer’s mobile phone which he takes off-site frequently, but also places in range (close proximity) of the ES-II to allow data to be uploaded to VRM at least daily.

For the approximately two months from installation it all ran smoothly, but now the WiFi in the GX device is not connecting to the phone.
When I went onsite it appeared the unit had ‘lost’ the WiFi password.

After re-entering the password the unit displayed ‘Connecting’ for a few minutes (maybe 5-min?) then after logging on, lost that connection almost immediately.

I repeated the logon attempt using a different phone (mine) and saw the same thing.

Back to the customer’s phone and it happened again.

Is it possible there’s a fault with the unit, or is it likely to be a programming issue, or something in the recent firmware?

Along with the EasySolar-II, the system comprises 12 x 285W PV, 3 x PowerPlus Lithium Cells (in parallel)

Any advice or information greatly appreciated.

diamond asked
diamond commented ·

0 Answers

BMS setup for 32x 3,2v Lifepo4 280Ah & Multiplus II

Hi all,

New to the forum, I have scanned for similar posts, but can't find any same answers.

Sorry if i have missed previous answer.

I'm looking to build home battery, with a grid-tie Multiplus-II 5000VA and 32x 280Ah Lifepo4 3.2v cells (16s2p making up the 48V, 28kWh). Battery Link here

My existing setup includes 8kW PV on a Fronius Primo, and will be optimised for self consumption, whilst incorporating EV charging.

My question is currently around the BMS setup. I am looking to use the Daly 16s BMS, but unsure if there is any benefit in using 2x BMS's, 1 for each 16s string, or only use 1 BMS with 2 cells wired as pairs into single 16s string). Obviously with this arrangement I will loose the monitoring of difference in voltage between the cells in each pair, but not sure if there is any other benifit / downfall.

Thanks in advance.

gnsa14 asked

0 Answers

Cerbo GX and tank level

My CerboGX show the tank level as %

Right now 18% of 200 liters = 36 literes.

How can I get it to show Liters and not %


henrikvj asked
Paul B answered ·

1 Answer

Large solar arrray, want to convert from enphase to MPPT RS

I have 60 (soon to be 80) Sunpower 350 watt panels, each with an enphase microinverter, ac coupled to a pair of Quattro 10KVA/120/48s.

The enphase have become extremely unstable and very frustrating. I used to routinely see 14-16KVA from them but now they 'bounce' up and down all day, throwing 'grid errors' in the log and producing diddly squat. :)

I see Victron has a new MPPT 450/100 or MPPT 450/200 solar charger.

My question is, can I run 6 strings of 10 panels (43.5 volts, 8 amps) or must I break them into smaller groups? If I can run strings of 10, I will only need three of the 450/100 or 2 of the 450/200 chargers.

I realize my array is nominally 18.5 KVA and 480 amps!!! I have plans for that power!!!

Any and all help appreciated, especially from Victron.

jlportman3 asked
Paul B edited ·

1 Answer

Isolated DC Negative from Hull/Ground for Aluminum Hull - Quattro

I have an aluminum hull boat and due to being an aluminum hull the DC system is completely isolated from the hull (engine negative is only connected to hull during cranking) A leak meter is installed which will indicate if there is a connection between hull on either the positive or negative of the DC system (indicating risk of corrosion). This question is regarding the plan to install a Quattro (or Multiplus) Inverter/Charger. Is the DC negative isolated on the Quattro from the AC ground and Chassis such that I can maintain my DC battery negative isolation from my hull? Thank you for any input.

altair asked
Paul B answered ·

1 Answer

Blue power 2 (2012) do not work with my new Multiplus 24/3000/70

Blue power 2 (2012) do not work with my new Multiplus 24/3000/70, can I update BBP2 or can i by a new BPP2 ? Will my old battery controller ( 2012) work with a new BPP2 ?

hakan-wedeby asked
Paul B answered ·

1 Answer

Cannot connect anymore to smart solar mppt 100/15 firmware 1.54


I connected with my cel phone to myto smart solar mppt 100/15 with fw 1.54.

After freezing connection I tried to connect with other one. Nor new one nor old one can connect again.

The charger shows the device greyed out. I have diasabled bluetooth etc rebooted cell phones.

No chance. This happens since about 2 week.

Impossible to connect.

What is the right way do solve the problem?

Do I have to disconect all power so device shuts off?

Is there no other solution?

This never happened with older fw...

tkmbe asked
Paul B answered ·

1 Answer

Missing Dashboard data

I have just added two temperature probes and two tank level monitors. All the readings are fine in the settings and in VRM advanced, but none appears in the dashboard.

And yes everything is up to date.

vincefarrar asked
Paul B answered ·

1 Answer

The system is locked to 53 Hz and does not resume

Hi, I have followed all your guidelines and the Firmware version 476 is at the latest revision but the Quattro still holds our the ac coupled Fronius even when the BYD battery is below 54V

cleverconnections asked
Paul B edited ·

1 Answer

Can anyone help with CCGX - Manual Start Stop Time values?

Hi all, Are you all well? Hope so. I have recently got property that has (among many cool things) has a CCGX controller, for which is connected to my network and I can navigate around and use well remotely.
However, I tried to enter a time value into the Manual Start -> Run Time box (from my laptop) but it didn't like what I input and now just has the letter NaN:N and whatever I do, either on my laptop, phone or on the controller itself, I can't remove these letters.
Can anyone tell me how to remove them and for future use, how to correctly input numeric values from my laptop?

Any help greatly appreciated.
Thank you.

paul-f asked
JohnC commented ·

2 Answers

SAE Solar Cable extension in 10AWG

Does anyone know where i can get SAE connector solar extension cables in 10AWG and 15 feet? I can only find smaller gauges and/or MC4 connectors.

mark-webster asked

0 Answers