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Battery Protect

Smart Battery Protect compatible with Cruise2.0 outboard and SWAC?

Dear Victron Community,

I've read that a Smart Battery Protect shall not be used inline with inductive loads like 230V inverters. This raised concerns about using Smart Battery Protect for electric motors and compressors.

I'd like to use a SBP-100 to drive a Torqeedo Cruise 2.0 24V 2kW outboard (relay operation only, added benefit of bluetooth control) and a SBP-65 to drive a seawater airconditioner (HFL coolmax 24V 22A).

What are your thoughts on feasibility and longlevity of these approaches?

EDIT: Cruise 2.0 manual recommends a 125A fuse. Cruise 2.0 cable set ships with a CF8 135A fuse. So how about a SBP-220?

Stephan Gerz asked
Stephan Gerz commented ·

1 Answer

Battery protect between fridge and battery, alternator directly to battery


I have very basic knowledge of electronics, please keep that in mind when commenting :)

Up until now I had a straightforward setup. My 2nd car battery (used only by my small dc fridge) was charged directly by my car alternator (BM Solenoid used to charge the 2nd battery). To the 2nd battery I had only my fridge directly connected. The fridge was always on (when in use) and sometimes drained the 2nd battery when the vehicle was stationary to long. I therefore installed a battery charger, directly wired to the 2nd battery, which i would use to charge the battery when the vehicle was standing for long periods at a time.

I would now like to install the BatteryProtect 65 only between my fridge and the 2nd battery, to prevent the battery from being completely drained by the fridge.

Question: Can i leave my alternator (BM Solenoid used to charge the 2nd battery) and battery charger directly connected to the 2nd battery as before? And use them to charge the 2nd battery the same manner as before? ...without having to go throught the Batteryprotect?

alspal asked
alspal answered ·

3 Answers

Help defining specs charger/inverter and battery protect CAMPERVAN

Hi all! :-)

I am a young an enthousiast girl buzy with a camperitzation of a van (not sure how far I will get but I'll try!) and I saw and read a lot of information, but I have some doubts about which criteria to follow when choosing Victron equipment. Hopefully someone can help me! My apologies upfront if I'm asking stupid questions :(

My system will have:

- 2x320W solar panels

- 2x170 Ah 12 V batteries (link 1 or link 2, to be decided) --> are these ok for the application?

- 1x Relay RL-180/200 12 V to connect to the alternator

- 1x SmartSolar charge controller 100/30 (because max current both panels is 21 A)

But I am not able to define what are the specs that I need for the:

- Multiplus inverter/charger from Victron:

First question is, do I want a module that does alltogether or shall I buy separate components? Second question: which is the power that I need for the charger and inverter side?

My consumers in 230 V are:


Total A/day = 23,73; Total W/day = 5458

My consumers in 12 V are:


Total A/day = 102,88; Total W/day = 1234,6

Third question is: I want to install an outer power take off to connect to the camping 230 V socket and charge/use the 230V consumers with the electricity of the camping mains. If I would connect the vehicle to the camping socket, will the multiplus inverter/charger charge the batteries and allow me to use my 230 V consumers at the same time? I want to avoid the situation of connecting to the camping grid, batteries not full and using 230 V consumers and not having enough power, since with a 10 A socket from the camping, I can only consume 2300 W (3680 W max with 16 A). Like: I plug to the camping socket and I plug my hairdryer, does the inverter charge at the same time the auxiliary batteries? If so, with a 12/1600/70 model and a 1000 W hair dryer, I could not connect many more things since the inverter can deliver max 1300 W!

Is the 12/1600/70 indicating the max charging current of the battery? What is the maximum charging current of the batteries? 170 A?

Also not able to define which:

- battery smart protect: fourth question: which of these 65A/100A/220A ? or another?

Sorry for my lengthy email, but I am new in this field. Every help is very appreaciated!

Many thanks in advance,


wendy1 asked
Erik Sporns answered ·

4 Answers

Battery Protect with Lithium and 250amp alternator.

I am installing Lithium batteries as a house bank. The alternator I have fitted to the boat is a 250amp. What Victron product will need to be fitted between the alternator and the batteries to reduce the amps and provide a divert to a lead acid to protect the alternator in the event the bms switches off the Lithiums.

shanti asked
bathnm answered ·

1 Answer

Hydrogen Sensor


We are finalising a large build with 3x 15000W Quattros of 280Kwh of capacity, all AGM. We need a way to have a protection against hydrogen, so we have here 2 sensors and wondering if they can connect direct to CCGX or through Arduino.


renz asked
mvader (Victron Energy) commented ·

4 Answers

BatteryProtect 65A settings for 24V flooded deep cycle battery pack Rolls Surrette S-605

I have 4 Rolls Surrette S-605 deep cycle flooded 3 cell batteries set up as a 24V system, managed by Victron Easysolar 3 kVA with Color Control.

Basically S-605 is 100% charged at 2.10V per battery cell, ie 25.2V system voltage and 0% at 1.75V per cell, ie 21.0V system voltage.

The only load connected in winter time is the EasySolar 3 kVA with Color Control itself in charger only mode and no other loads via EsaySolar (AC output).

BUT there is a 12 V circuit connected via 24/12 V Orion-Tr-DC-DC-converters-isolated-100 to the battery pack.

The BatteryProtect 65A is before the Orion 24/12 converter.

The only load in the 12V circuit is a modem connecting Easysolar to VRM service. The modem originally used 240Ac- 12V power source but is now connected directly to the 12 V circuitry.

Which BatteryProtect 65A setting would be appropriate to protect the battery pack at -30 degrees Celsius in open air? Had it at the factory setting 21/23 V which led to batteries being totally empty and that almost destroyed the batteries when temp dropped to -28 Celsius.

jarit asked

0 Answers

How does this not ruin a Start Battery?

In this design example, a Sterling DC to DC converter is used to charge a lithium house bank with the Start battery as the "Source". So for example, if we are charging the Lithium Bank at 60Amps over 3hrs, how is this justified when a Start battery is not designed to provide high current over a long period of time?


ve-user asked
pau1phi11ips edited ·

3 Answers

Trouble switching battery protect from ve.bus bms charge disconnect

I'm trying to use a Battery Protect to switch the ignition input on an external voltage regulator, to disable alternator charging. According to the Victron manuals, if I connect the ve.bus BMS load disconnect to the battery protect remote H/+ terminal, then the Battery Protect should disconnect when the charge disconnect line floats.

I've programmed the Battery Protect to mode 0-C — the lithium mode.

I'm trying to test to make sure this is working, but when I disconnect the BMS charge disconnect from the Battery Protect H/+ terminal, the relay continues to remain closed, and I have full voltage on both the input and output for the battery protect.

Can someone provide some suggestions?

pmolettiere asked
pmolettiere commented ·

3 Answers

Superpack continually fluctuating low (0.2-1.5V) voltage

I have a superpack 20Ah paired with a bluesolar 75/15 MPPT charger. I connected the battery inputs in reverse, and the charger's 20A fuse blew. I corrected the polarity. When I then replaced the fuse the charger started smoking. Upon disconnecting everything the battery output was fluctuating between approx 0.2V and 1.5V. Presumably the BMS detected a short circuit condition and has disconnected. I've tried applying 14.2V using a PSU, and the battery draws just a few hundred milliamps. The battery voltage will always mimic the PSU voltage, dropping to 0V if I turn the PSU off.

Any ideas on what's going on and how to resolve this would be hugely appreciated.

Here's what happened in more detail:

  1. We connected a Victron Energy superpack 20Ah to a victron energy MPPT blueSolar 75/15 charge controller the wrong way around.
  2. Upon flicking the switch the system remains off, and we discover our mistake and a blown fuse. We did not check the battery at this point.
  3. The battery is then reconnected to the charger with the correct polarity and the fuse replaced.
  4. We flick the ON switch once again, and this time the charge controller starts smoking. We disconnect everything.
  5. When inspecting the battery we discover that the output voltage is low (0.2-1.5V) and fluctuating; presumably the BMS has tripped.
  6. Typically, when this happens you either need to disconnect the load and wait several seconds, or apply a sensible charging voltage.
  7. When the battery did not auto-recover we applied 14.2V (recommended charging voltage) with a PSU and noted that the current draw was low, although was gradually dropping as would be expected if the battery was charging.
  8. When turning the PSU voltage down the battery would track it. Turning the PSU causes the battery to read 0V. When physically disconnecting the PSU the battery returns to its fluctuating state.

This is unexpected for several reasons:
  • The charge controller appears to lack reverse polarity protection.
  • Ultimately, neither the fuse nor the battery BMS reacted fast enough to defend the charger.
  • The battery should be easily capable of withstanding a brief short circuit condition through a 20 amp fuse, even without a BMS.
  • The BMS is not auto-recovering as it presumably (no user manual) should.

liam-trimby asked
Matthias Lange - DE answered ·

1 Answer

Swollen smart battery protect

Hello all, have an issue with VictronConnect smart battery protect, I had one installed on both the in and out of the batteries as suggested on the VictronConnect wiring diagram.

On a recent inspection of my system

I noticed that the battery protection on the in side (solar chargers to battery) of the battery has swollen!

All connections are tight

4x 100ah life4 litium batteries connecting in parallel to create a 400ah 12v system

2 15/30 mppt smart soar chargers creating a combined 500w array although neve achieved more than 350w due to English weather,

All connected together via the victron energy cerboGX

I’ve not seen any draw or charge above 25A Certainly nothing near 100A which is the rating of the battery protect. I’ve removed said battery protect but I have a feeling the out is starting to swell although I could be paranoid but i noticed it was getting very warm but system Was only pulling 18A !?!

I can post a phot of the swollen one up if needed.

Any ideas ??

cyan asked
cyan commented ·

2 Answers

Battery Protect PUK not being accepted

As per the subject really, I’ve forgotten my PIN for my battery protect and I’m trying to reset it, unfortunately the PUK doesn’t work.

All I get is “Function not available, check the product manual for an alternative way to rest PIN code.”

Putting an incorrect PUK code in gives the same result.

I’ve tried turning off & on but no difference.

Also read manual but nothing there either.

Help! Im now locked out of my BP.

TIA Richard

rikkyp asked
Thiemo van Engelen (Victron Energy staff) answered ·

1 Answer

Battery Protect and Capacitors

I plan to use a Smart Battery Protect on a circuit that will be used to charge batteries for an electric outboard. I am concerned about the warning in the manual about connecting inverters or anything with capacitors. The Epropulsion outboard uses detachable 48 volt batteries. A couple different chargers can be used that operate from 12 volt systems. Are these chargers similar to an inverter and do they contain capacitors?

fritzdfk asked

0 Answers

Can I use the H & L remote inputs of the Battery Protect at the same time?

Hi all,

Can I use the H & L remote inputs on a Battery Protect 65 at the same time from two different sources?

Ideally I'd like to use the High level input for a rocker switch to turn the BP65 on/off. & I'd like to use the Low level input for a BMV-712, SOC relay to switch the BP65 on/off.

I accept I could use both the switch & relay in series and switch either one of the H/L inputs. However being able to use both at the same time, in my case would reduce complexity & wiring.

Thanks for you input.

tg1 asked
tg1 commented ·

1 Answer

Battery Protect showing different voltage than charge controller

I have charge controller and inverter connected direct to battery, battery pos to pos bus terminal neg to neg bus terminal, pos bus terminal to battery protect, battery protect to pos loads, neg loads to negative bus terminal. My charge controller is reading 13.8 volts for the battery but the battery protect only 9, and so it cuts off power. What am I doing wrong? Thanks for any help

phatemi asked
phatemi commented ·

1 Answer

Small BMS in use with other charge controller

I am trying to set up a remote monitoring system for a single panel and battery system. I have a LiFePO4 smart battery for my system. I believe the small BMS is the best option for my situation. Before I purchase it I would like to know if it is compatible with other (non-victron) charge controllers? Other MPPTs suit my needs better does the small BMS need to be connected to an MPPT? Do I need a shut off, such as the battery protect, as well?

wior0474 asked
Paul B answered ·

1 Answer

How to protect your batteries against a failed Multiplus?

Many know that a battery protect cannot be connected between a Multiplus and the batteries. So if while unattended, the Multiplus throws a wobbly and either continuously charges or discharges the batteries, what can be used to disconnected it when the voltage exceeds some pre-defined limit? I know when it's working it will look after the batteries. My concern is when it fails. With a separate charger and inverter, a couple of battery disconnects could be used, but not with an inverter/charger.

I know many LiFePO4 batteries have a built in BMS which will disconnect them but I have a Batrium BMS which will ask the Multiplus (via the CAN bus and Color GX) to stop but cannot actually disconnect it.

I supposed I could use a big relay but I don't like the idea of having a permanently energised relay in the system.

I guess I'm looking for a 250A (I have the Multiplus 3KVA) common port battery disconnect.


Colin Mills asked
Colin Mills commented ·

1 Answer

Electric boat design review request and specific questions

Hello! We are building a 25' all-electric boat, with various Victron components and hoped to get some advice from the community. Questions are up top with details of the system farther down.


Battery Protection: We need to have battery under/over voltage protection on the 48V bank, but the largest 48V battery protect from Victron is 100A, which isn't high enough to have just one (We anticipate a potential burst load of say 8kW for 30 seconds or so, which is a 166A load). We could monitor each individual 48V battery with a separate BatteryProtect, but is this the best way to monitor and protect the batteries?

General System Design: Does anyone see a problem with what we have proposed in the diagram below? Any gotchas to watch out for? We are hoping the Cerbo GX and GX Touch 50 + iphone apps will provide monitoring and alarms for system operation.

12V system and battery: We need a 12V battery and require monitoring and protection for it, ideally victron branded and something we can monitor using with the GerboGX alongside the rest of the system. It doesn't appear that the 12V batteries from Victron natively connect to the Cerbo GX, will this require a BMV712 or smartshunt to be monitored? And if so, which is recommended?

Solar System: We will probably have two different sizes of solar panels on the roof of the boat, potentially with different nominal voltages, would that require two different solar charge controllers? Thoughts on flexible vs rigid panels, and the Victron charge controllers that would be best? We haven't purchased the panels yet so needed details are missing but any general advice is appreciated.




Gavia Electrical System Design


Description: Gavia is a 25’ all-electric solar motor boat under development.

48V DC System: The motor is a brushed 7.5 kW DC 48V Thoosa Electric Motor. We hope the nominal draw will be around 1-2 kW while under way, but short bursts (1 minute) of 7.5kW are expected (we have not tested the boat in the water yet). Energy will be provided by a 48V lithium-iron battery bank. Solar cells on the roof will be the primary recharge method, hopefully 1kWp or greater, with AC shore power and backup 1kW generator for AC charging on-the-go. A hybrid inverter/charger should be a convenient way to pack lots of functionality into one box, and AC input/output should be 120V (we are in the USA).

12V DC System: The 12V DC system will be used to run low-wattage house electronics (navigation, radio, windless, house lighting, etc), and 12V bow thruster whose max draw is 1500W. This larger 12V draw necessitates a 12V energy bank (vs relying on DC-DC converter), so a 12V 100+A lithium battery will be used and it should recharge from the main 48V system.

120V AC: 120V AC will be used for a minimum number of appliances onboard, the largest of which is the induction cooktop with a 1800W maximum draw. This will be provided by the hybrid inverter/charger.

Note that we do not anticipate running the high power loads at the same time. For example, we won’t run the induction cooktop while the electric motor is running.

Here are some system components:

  • Inverter/Charger: "PMP482305100 MultiPlus-II 48/3000/35-50 120V"
  • 48V Bank: SimpliFi PHI 3.8-M ("PHI3.8 48V 60 VTE BRK") wired in parallel (x4)
  • Onboard component monitoring (interior): "Victron Energy BPP900455050 GX Touch 50" with "Victron Energy BPP900450100 Cerbo GX". Onboard component monitoring (exterior helm station): ipad similar device running victron app, with weatherproof case
  • Battery Capacity Shunt: "Victron Energy SHU050150050 SmartShunt 500A/50mV"
  • Battery Protect: Undervoltage/overvoltage protection: The batteries have a BMS, but we need an additional protection for the battery bank as a whole or the individual batteries.
  • 12V DC Charger: We will use an AC battery charger to charge the 12V bank. We cannot use a DC-DC charger for this because the Victron DC charger is not isolated; the motor requires no other DC systems on the negative side of the 48V system
  • 12V House Loads Battery: something with 1kWh of energy and built-in BMS, and some way to monitor the voltage.

ev-gavia asked
shaneyake commented ·

3 Answers

why can I not use a smart battery protect between battery and inverter?

Hi all,

Just bought a battery protect (the larger smart one/forgot the details, sorry).

Thought I could hook it up between battery and loads and have it turn off current in case of battery-low-voltage. As a safety measure thing.

Then I`read:

you cannot use this device between your batteries and an inverter (...)

Is this for real?

Of course I have an inverter! Don't we all?

How am I going to battery (lowvoltage) protect my system?

My set-up is 4x 160W panels, MPPT 100/20, 12V system

thanks for any advice,


westen asked
shaneyake commented ·

3 Answers

Smart Batterie Protect auch zusätzlich als Batterieschalter nutzen?

Moin Zusammen,

ich stelle mir gerade die Frage, ob es möglich ist die alt bekannten Batterieschalter durch zum Beispiel einem Smart Batterie Protect zu ersetzen. Hier kann ich an den Pins Remote per Schalter auch den Out Ausgang abschalten, so als wenn ich per Batterieschalter ausschalte.

Ich weiß, das die Hauptfunktion eine andere ist, nämlich die Batterie vor Unter- oder Überspannung zu schützen.

So hätte ich aber beides in einem Gerät.

Schaltung wäre:

Batterie Pluspol - Hauptsicherung - Smart Batterie Protect

Danke für eine Antwort!

Gruß Norman

Norman Kühn asked
Norman Kühn answered ·

2 Answers

Contradiction in 220A battery protect manual ?

Hi folks.

Trying to avoid an expensive mistake

before finalising my wiring!

having read the battery protect manual i fully get that Vout should not be a higher voltage than Vin. Makes complete sense.

But on the last section of the manual,

It shows 2 battery protects in series where:

The input of battery protect 2 is connected to a charger (MPPT stated)

The output of battery protect 2 is connected to the input of battery connect 1 which is commoned to

Battery bank positive.

The output of battery protect 1 is then connected to the load.

And in one sense that works in my mind - insofar as no input to battery connect 2 Shuts down battery connect 2s output.... the sun goes down....there is no volts on the input to battery connect 2 therefore, at that point in time the output of battery connect 2 is at battery voltage...BUT the input of Battery connect 2 is at zero V (no charge coming in) so at that point you have an "approved" configuration where it seems there is potential to cook battery connect 2 !!??

So ....other than fitting a 60-100A Rated schottky diode on the output of Battery connect 2 so that the battery can never reverse shunt battery connect 2 , how do you stop Batt connect 2 being fried when no charge current is present on its input ?

To my mind the manuals statement and the last drawing are in contravention - which is right please?



bigbloke asked

0 Answers

Battery Protect 100 remote on off and external on/off both connected possible?

I have a BP100 in a Lithium system with a VE Bus BMS. Can I use the remote on/off switch (as in the standard diagram) in combination with option C (Li-ION), so the external on/off signal also connected? I want to have the capability to turn off DC loads connected to the Battery Protect, independent from the BMS

mberg asked
Matthias Lange - DE answered ·

1 Answer

Cause of total system shutdown???
Looking for answers on what could be the issue with our Victron system...(3x 200Ah "Smart" lithium batts with Victron BMS, BatteryProtect, BMV and Color GX monitors, Quattro inverter/charger, MPPT controllers, etc.....all Victron).
A couple of weeks ago, we were hit by a heavy squall, with 35-40kn true wind on the nose, in large confused seas. The autopilot, an NKE driving an L&S hydraulic ram was struggling with the excessive weather helm. Just as we were preparing to put in a 3rd reef, the entire boat "went dark" without warning. No autopilot, instruments, gps, radio comms, or lights.....all 12v circuits on the boat were dead! And just as we really wanted the autopilot to keep driving as we tucked in another reef. The boat was on her ear, (we later found seaweed draped over the leeward lifeline!!!). As we struggled to regain control, all of a sudden the boat "lit up".....all 12 volt circuits started up again!!! YEE HAH!!! we did a quick happy dance!!! But our happiness was short lived, as the cycle of off/on happened 3 more times over the next hour or so. Visibility was very poor, as the rain got heavier. We started the motor (it has a dedicated starter battery) and dropped the mainsail for the last bit of the overflows. At last we rounded the Mull of Galloway and gladly headed north. Conditions have been comparitively mild since then, and the problem has not recurred.
So what happened to our electrical system? After all, having the boat shut down like that at the wrong time could be disastrous. Had this occurred at night, in shipping lanes, ships tracking us on AIS or visually by our lights would not have known we were out there. And similarly, we would have been "blind" without radar or AIS to spot ships. While we still have no definitive answer, at this point all signs point to the Battery Management System (BMS) of the lithium battery installation. It's the only thing which would shut off all of the loads like this. The job of the BMS is obviously to protect the batteries, and will shut down all loads on the system if it senses low overall system battery voltage, overheating of the batteries, or cell imbalance between individual cells in the batteries.
According to the installing electrician/dealer, he feels that the system was "operating normally"!!! That given the struggle of the autopilot in these wind/sea conditions, it is possible that the demands on the battery bank MAY have caused a cell imbalance which caused the BMS to shutdown, even though the overall battery voltage was fine (we'd been charging while hooked to shore power for 3 days so had been 100% only 2 hours earlier).
I am having a hard time thinking of this as "normal operation". Normal operation of critical systems cannot simply shut down without warning, or the system is not suited for purpose!!!!! And also that a cell imbalance could have been brought on by excessive load on the batts. (the autopilot only requires a 30 amp 12v, that's just 360 watts, .05c, far less than the load imposed by an induction hob or microwave which we often use for longer periods through the inverter without effect.). While of course I was a bit too busy to check the individual cell voltages with VictronConnect during the shut down, whenever I check the voltages at other times, the 12 cells are all within .01 volt of one another. Any ideas of what could have caused this shut down (it has not happened since)??? And what could prevent it in the future? I am thinking of installing a battery switch in parallel with the terminals of the BatteryProtect relay, normally kept open, in case of another emergency shutdown, though I have been advised that it's use could void the warranty! Any suggestions are welcome!

svbravo asked
shaneyake commented ·

3 Answers

Exlplain remote on off switch for battery protect?

I thought I understood how to use the battery protect remote switch terminals to wire to my inverter on off switch thinking the battery protect would shut off the inverter upon low voltage or when I shut it off in the app. The directions seem simple enough, but it doesn't work. Iv tried every possible configuration. I understand the inverter terminal should never be connected through the battery protect, yet many people tell me they have been doing just that long term with no issues.

Why wouldn't the battery protect be designed to work with an inverter or even an inverter on off remote switch? What am I missing?

Why does this device seem useless and overpriced?

The app has no audible notification of low voltage. My inverter will drain my batteries with no help from the battery protect. Really? Why? Is my only option an annoying alarm that will wake me up in the middle of the night and force me to manually turn off my inverter? Or is there another way? Is a relay my only solution? I want the battery protect to do what it should, turn off my inverter when my batteries reach low voltage. Is that too much to ask from the battery protect that cost me $80.

I have no dc loads to use with it other than my inverter.

Thank you in advance. I sincerely hope I do not have to return the item for a refund to use a much cheaper device that will do the job.

aceclement asked
wkirby commented ·

3 Answers

BatteryProtect display meaning

A BatteryProtect 12/24V-100A is used as load shedding controlled by a VE.Bus BMS connected to a LiFePO4 Battery 12,8V/100Ah Smart. After a full charge of the battery we sailed off and after about 5Ah consumption (navigation instriuments + rudder control) the BatteryProtect has cut off showing a moving "C" on its 7 segment LED display.

What does this moving "C" mean?

Also, after some hours' rest (about 7 hours, while the system was switched off) is has resumed without intervention. Why?

Unfortunately the sailing conditions were harsh enough not to be able to check the fault at once, and when got back to the marina, the system was OK.

Any clue is welcome! Thank you in advance.

a-v asked
mcdoo answered ·

1 Answer

BatteryProtect needed with smart LifePO4 battery?

Is the BatteryProtect needed/useful with the smart LifePO4 battery?

Does the battery itself stop sending current when its voltage is too low?

The battery itself has an "Allowed-To-Discharge cell voltage" setting, the manual says "As soon as one of the cells reaches this voltage, the BMS will disable all loads by sending a signal to the load or to the load disconnection device.".

I don't understand if the battery is smart enough to stop sending power to devices once that voltage is reached, or it (and the VE.Bus BMS) needs a "load disconnection device" that acts like a switch between the battery and the load.

A standard load wouldn't care about a stop signal, unless that signal was a complete lack of current.

I often see the BatteryProtect in schematics but it seems the battery with the (VE.BUS BMS which is directly recommended) may already be equipped to protect against under/over voltage.

trougnouf asked
drlbradley edited ·

3 Answers

Increase Smart Battery Protect Overvoltage

Is it possible to increase the smart battery protect overvoltage from 32 to 33V?

I’m using Nissan Leaf batteries and so my 24V actual operational voltage on the high end is 32.88V and I’d love to be able to continue charging from the MPPT through my smart battery protect all the way to 32.88V instead of having to set it to 31.9V.

dragon-wagon asked
nebulight answered ·

3 Answers

Yacht installation Lithium

I'm upgrading to Victron Lithium on my yacht, 3 x 100AH type.

I have the MPPT100/30, BMV-712 already installed, and recently puchased the CL 12/100, and the VE non inverting cable to go between the MPPT and CL12/100.

I also purchased the 220amp Smart Battery Protect, as i'm running a 2000w inverter (not Victron).

I managed to "blend" a couple of schematics from Victron, and just wanted to check that it all looks good before i install the system.

Other relevant info is the boat has a 100A alternator and 600W of solar panels, (2 x 200W fixed and 2 x 100W flexible that i bring out in winter)

Can i get some feedback on this schematic? Most importantly have i messed something!!


diamach asked
diamach answered ·

3 Answers

Short Circuit Load Output

Hi, We have made up a 12v 600Ah LiFePo4 battery using a 100/20 Victron Controller. we had 2 x 200W solar panels ready to power a road sign, so all they had to do is connect the PV and the load and they were done, however when our installers installed it to a load, they told us there was no power on the load available, so they used out direct power feed we had built in as a redundancy. We went down a few hours later to check what they had done and there was clearly power available at the load. Is it possible they short circuited it during install on the load or PV and its simply reset itself? We cant check the BT as its installed in a way that is not possible. Any thoughts would be helpful.

scott72 asked
wkirby answered ·

1 Answer

Can I use a Victron Battery Protect to Cut solar input on my motorhome when the engine is running?

The reason for my question above is because I have a 50amp DC-DC charger however with the engine running and solar connected it will only charge at 25amps. Im therefore looking for a way of cutting the solar power input when the vehicle engine is running. This way I will get the full 50amps of charge.

judder asked
judder answered ·

2 Answers

Smart Battery Protect with SmartShunt


From reading the manuals the SmartShunt compared to the BMV devices is lacking the pins to set an output alarm or relay.

Which means that I cannot use the SmartShunt together with the Battery Protect to disconnect my DC loads based on the SOC of the battery.

However as both the SmartShunt and the Smart Battery Protect have bluetooth and I have seen in the app that there are networking features, can the SmartShunt talk to the Smart Battery Protect wirelessly and tell the Smart Battery Protect to disconnect my DC loads when let's say my lead battery reaches 50% SOC?

Thank you very much,


alexandruy2k asked
alexandruy2k answered ·

2 Answers

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