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Can we Parallel the Smart Battery Protect Remote Signal of two or more separate units?

I am working on a project with a customer who wants to have 2 x Smart Battery protect 48V-100 in parallel because his solar panel MPPT load is higher than the 100A capacity of the switch. The MPPT's are not Victron and cannot be controlled with a GX product to stop the charge if required. Each Switch input is going to separate MPPT controllers group, the output connected th the BMS Load side bus.

The BMS only has one normally open contact output used as an Allow to charge signal. We normally use this contact to drive the Remote Signal of the Protection relay. In this case can we drive both remote signal with a single contact and in effect paralleling the two control circuits or do we have to use a relay with multiple sets of contacts?

Jmarc asked

0 Answers

BP40 - charging by reverse current in my old motorhome - blocking diode?

Hi all. My 25 year old motorhome has the house battery at the front and a Power Management System (PMS) at the rear where the 240V hook-up lives. The PMS handles 12V distribution but also has a transformer in it to provide battery charging (14V-10A) when hooked up to 240V. It contains the 240V consumer unit too as it happens but not relevant here. Charging happens by reverse current using the wiring between the battery and the PMS unit (the load). I want to protect the house battery from over discharge using a Victron BP40 but the back-charging arrangement will apparently set the BP40 alight! So here's the question: Can I just use a blocking diode (45V-20A) in parallel with the BP40 to facilitate safe back-charging? Will be adding solar panels in due course (10A max) but essentially it's the same problem. Would love to hear from anyone who has seen this before but all comments will be gratefully received. Thank you all in advance for your thoughts.

pablo-kontiki asked
pablo-kontiki edited ·

0 Answers

BatteryProtect 12/24V-100A - SMART get's hot!


input Voltage


output Voltage


Voltage drop

Hi! I have huge problems with my BatteryProtect 12/24V-100A SMART. For some time now, it has been getting extremely hot in operation, even if I only constantly consume arond 60-70W. The voltage drop between the input of the BatteryProtect and the output is approx. 5 volts!!! According to the thermal imaging camera, the BatteryProtect gets 56°C.
Something can't be right there, right? does anyone know the problem?
The annoying thing is that my BatteryProtect, which was still under warranty at the time, broke about 2 years ago and the replacement device seems to be causing problems again. So far I've actually always been satisfied with Victron...



cyborgxxl asked
cyborgxxl edited ·

0 Answers

Appairage BatteryProtect HQ2132JXTXE et Orion Smart HQ2137XNUMZ par Bluetooth


Mon installateur m'a installé BatteryProtect HQ2132JXTXE et Orion Smart HQ2137XNUMZ.

Sous son contrôle, j'ai installé l'appli Victron Connect. Lors de la première utilisation dans son garage mon téléphone Galaxy A20 ne s'est pas appairé par le Bluetooth avec les 2 appareils.

Arrivé chez moi, j'ai reussi à appairé mon téléphone avec les 2 modules et j'ai pu changer les 2 mots de passe et voir les informations.

Depuis, j'ai renouveler l'accès plusieurs fois sans succès...

Merci pour toute information.

pri asked
Thiemo van Engelen (Victron Energy staff) commented ·

0 Answers

battery current discharge
would it be possible to insert the parameter sent by bms max. discharge current of the battery as an adjustable value in cerbo or shunt? Or is somebody who already solved this problem?

siolaservice asked
Alexandra commented ·

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Battery Protect

I have come across a situation and hoping that you may have heard of this and might be able to suggest a solution.

A microwave oven on the boat is powered from a Freedom 20 inverter. When the microwave is turned on either the Victron Smart Battery Protect or the Cyrix-Li-Load randomly turns off. It happens about 20% of the times the microwave is used. It has never turned off both devices at the same time. It never happens when the microwave is operated on shore power which would suggest that the inverter is emitting some kind of pulse or signal which turns off the Victron devices.

I really appreciate any of your professional advice and thoughts regarding the above.

Thanks. Have a great day.

Paul Thornton

indianna asked
indianna commented ·

0 Answers

Victron Smart Battery Protect 12/24 |100 placement question

Hi Folks,

I have a two fold question about the best placement for Victron BP for my VAN build that has LIFEPo4 560Ah 12v house battery bank, REC BMS, Cerbo-GX, Orion-tr DC-DC, Multiplus 3000, and pair of MPPTs 100/30. Originally I purchased the BP thinking of protecting the car battery, when using Orion Dc-Dc charger, as for my indented off-grid travel, starting the engine would be #1 priority over any house loads. However while doing my research I found that almost no one using it this way. Most references in Victron diagrams I find the BP being placed before house load (that's makes most sense to me) or after MPPTs (why?)

What are the practical experiences on this matter, where to best utilize the BP, since I already have it? It seems that Orion Dc-Dc can safely protect car battery from discharging under reasonable use. I drive Ford Transit 2020 and that uses dual AGM battery bank, if this is relevant to the question. I can install the breaker switch between CCP and the Orion and turn it on when needed.

And the second part, what programming parameters needs to be applied to BP when use in the particular manner. It does not have VE.can connector, does it mean it can not talk to Cerbo-GX? And do I even need to install it with REC BMS controlling the cells?

Thanks in advance!


geolboy asked

0 Answers

schema aansluiting Orion- Tr Smart , Smart solar MPPT 75/15 , Small BMS Smart battery Protect65

Ik zoek het schema voor de aansluiting van een Orion- Tr Smart , Smart solar MPPT 75/15 , Small BMS en Smart Battery Protect 65.

Grt Apcruiser

apcruiser asked

0 Answers

Virtual load output when the sun is shining


I see there are several other posts regarding the same subject, that we want load output only when the sun is shining. I’m writing another posts as my user case is slightly different, and I hope that Victron listens to the users on this forum. The other posts show that there is no solution provided from Victron, its all workarounds.

For the user defined parameters for virtual load ouput, the user can only define the voltage for the battery, not for the panels. Should be an easy tweak to allow definition of panel voltage as well?

The streetlight function lets us define panel voltage for turning the virtual load output on/off, but only between sunset and sunrise. It should be a simple tweak to provide the option to turn it on between sunrise and sunset?

punda asked
punda edited ·

0 Answers

BP-65: For use as a LVD powering a 12-24VDC High Output LED light, with a 12V Batt source

Hoping someone can help understand what should be a simple LVD device.

I'm new to the BP series, and I find my self confused by some of the instructions. This is due to the face I've received and E1 code indicating short circuit, and my Output is never enabled.

Installation Step 4: SC will be activated when connecting directly to loads with a capacitors on their input. The light I'm connecting to has wide voltage range. 12 - 24 Volts AC or DC. That seems to make sense. However the lights In rush is 0.36amps with a nominal draw of 0.26 amps.

Clearly this light has capacitors due to the onboard power supply. but the current is less than 0.5 amps.

Instruction online talk about placing a 10k resistor in pin 2-1, (which is not labeled on the device) placing a 10kΩ between P2-1 & 2.2 didn't have a positive affect. (None of the BP-65 images have any labelling for the 2 pin plug other than "Remote")

When I connect my Fluke meter in DC voltage mode, and connect to the Programmable DC source (I'm using to test with), I only receive a 12V reading when I plug in the default remote jumper plug. If I lower the voltage to 9 volts (set to number 8 in the table), the BP-65 never disconnects the load automatically. I have to unplug the remote jumper plug. Again confusing me to no end.

Image of my simple test configuration is attached


mrosecb asked

0 Answers

Bluesolar DUO with different batteries - e.g. Li & AGM

1) Would it be possible to have two different types of batteries with Bluesolar DUO? For example 12V LiFePO4 and 12V AGM battery or then two AGM batteries with different sizes.

2) Also is there any output for battery cut-off at low voltage on Bluesolar DUO? Of course I want to keep my batteries without getting to too low voltage... Even a separate relay would be ok, but I would not like to build the logic for that (Battery Protect device is too expensive also).

3) How about two batteries of same type & capacity (Li, AGM or so), but having one completely empty and other one full. Example: You connect the full or empty battery on bank 2, while the othe one in bank 1 is in different state, what happens?

avaruuslehmipoika asked

0 Answers

Why would my 250/60 Smart Solar failing take out my BYD lithium battery system?

Apologies, this is a bit long, but I think necessary, in order to give you clever reders an understanding of the situation, hoping you’ll be able to help me:

My hydro turbine, running at absolute maximum speed gave 198V DC when totally unloaded, the water pressure in the line (96 psi) being as good as it gets. The 3-phase rectifiers I'd ordered hadn't arrived, so I had used the 2 rectifier method for getting the 3 phases into DC.

My Smart Solar 250/60 was “happily" doing the typical MPPT rollercoaster revs/voltage thing to the turbine, as the MPPT constantly played with the load. Fast, slow, fast slow.

I wrote to Victron, suggesting that they write a firmware update for hydro (these units are the most recommended ones for hydro generation that I've run across so far) with a button in the bluetooth setup for "Hydro", giving the option to adjust and set the load on the input, not just the output. Their repeated negative responses to my emails weren't the most humble ones I've ever received.

I had the Assistants in my main Easy Solar unit all set up (thanks Ben Stanton) to turn on a 1200W heater load when the SoC reached 98%, and off again when the SoC dropped to 85%.

All was good, the hydro was getting around 800W, until after a few hours, it suddenly spun up to full revs.

I closed the water valve as fast as I could, and discovered that not only had the 250/60 stopped, the entire lithium BYD battery box, and my main Easy Solar system had also crashed.

After an hour or so of trying to reboot everything, I finally figured it out - I got everything disconnected, and reset the batteries with their small reset button, reconnected the battery breaker to the Easy Solar unit, then the solar panels, and after getting AC supply back on (after numerous looping AC cutouts after 4 or 5 seconds, even while running just one 6W light bulb (batteries were about 45% SoC)) I finally got the AC on and stable again.

I reconnected the Smart Solar 250/60 to the battery again, checked the logs, found it had hit 260v and cut out. This was a mystery. How could it speed up past the no-load revs?? The only thing I can think of, is that the strange rectifier setup, combined with the 250/60 unit at the other end of the cable, conspired to give the turbine a little extra push. Or that the F&P motors have some kind of free energy ability… Anyway, I set the turbine spinning again with a bigger pair of water jets, less speed but more torque.

All was good again, until the the weather changed and the creek got low, so I turned off the hydro for a few weeks. The 3 phase rectifiers arrived, so I installed one in place of the 2 square rectifiers.

Just as I was soldering up the heavy red and black DC out wires from the rectifier, visitors arrived, and I hurriedly failed to squint carefully enough at the tiny + and - markings of the rectifier, getting the DC polarity reversed. Grrrr...

When I fired the hydro up, the Smart Charger got about 190v DC backwards across the PV in terminals, which killed it dead. I was kicking myself for not including a breaker both in and out of the unit. The same strange crowbar fault happened to the BYD Battery box again, taking out the whole system.

I went through the process of getting everything restarted, with the usual 4 sec AC cutout loops, etc. When I repeatedly failed to get any sort of response from the 250/60, and realising that the warranty was voided by my mistake with the wrong polarity, I opened up the case (took about a day and a half, involving chisels, drills, a big hole saw and grinder cutting disc, due to Victron’s obsession with epoxy resin) to see whether Victron had thought to include an internal fuse. There were 2, both blown, and the 6 big capacitors were all snapped off, and needed to be replaced, due to Victron thoughtfully encasing them in resin as well, so they’d be destroyed if someone managed to get the lid off. The Victron company plummeted drastically in my opinion that day... I couldn't see any other signs of damage, apart from some heat marks on the heatsink underneath the fuses.

Anyway, I replaced the capacitors, re-soldered the 3 other components also unseated by the resin, wired in external 20A fuses to both the input and output internal fuses, and hooked the unit back up to the battery. Clunk went the Easy Solar relay, and the whole system went down again, batteries and all as before.

I'm wondering if there is some sort of temporary “protection" short across the battery terminals?

The resistance across them is 0.1 Ohms. Same with the PV terminals.

Hooking up the unit to an old 12v battery with about 1mm cables there is a small to medium spark, and the cables slowly warm up. Is there any hope for my unit? Is there a way of resetting the unit without the bluetooth?

stokie77 asked
stokie77 commented ·

0 Answers

Battery Protect will not disconnect power

I have a BP 220 connected exactly as shown in the included schematic. It will not disconnect its poles for any reason under any circumstances ever. I sent the defective unit back and rec’d another one, same exact thing. Is this an exercise in complicating what should be simple?

cmccane asked
cmccane commented ·

0 Answers

Battery Protect 220 won't turn on (Error 1) if small loads are present on the output side

I'm having the following issue with the BP220, which has been bugging me ever since I've installed it on my system.

  • BP220 input connected on the positive system busbar through a 200A fuse, via a 2 AWG gauge wire.
  • BP220 output connected to non-essential loads (non-capacitive loads)
  • BP220 negative wire (gauge 16) connected to the main system negative busbar
  • BP220 L/H controlled via one of the LifePo4 BMS (Rec BMS) outputs.

It all works perfectly fine if I turn on the system with no active loads on the output side of the BP. After the system is turned on, it doesn't show any sign of flakiness, intermittent shutdown, or anything else. It works just fine.

If I try to turn on the BP with some small loads active on the output side, I get Error 1, which I read from the manual may be triggered by excessive voltage drop on the input side. I checked for voltage drop and I see pretty much none. I'm clueless on what to try next, so I was hoping to get some guidance from the community.

I can live with the issue as all loads behind the BP have their own breaker, but it just doesn't look right.

wkuna asked
wkuna edited ·

0 Answers

Feature Request: Smart BatteryProtect

I use a Smart BatteryProtect to control the charging of a high amperage charger to my battery bank.

It would be really useful to have a mode to disconnect the Smart BatteryProtect when my battery bank is at max soc (14.4v) and to connect it again whenever the battery is at a predefined voltage say for example 13v. That way my battery doesn’t stay floated at max soc

This wouldn’t be hard to implement. The only thing that would need to be changed in the app is to allow the “Shut down” voltage setting to be higher than the “Restart” voltage setting.

so for example I could enter 14.4v in the “Shutdown” setting and 13v in the “Restart” setting.

I figured that the reason this feature isn’t currently implemented could be that it would be confusing to a user.

This could be remedied by having a dialogue box pop up the this VictronConnect app whenever a user sets the shutdown voltage higher than the restart voltage.

Or to add an extra mode for this feature in the mode select dropdown. It could be named “external charger control”.

kincaid-kawananakoa asked

0 Answers

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