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Battery Protect

Smart Battery Protect and Orion DC-DC

Hi, I'm planning to connect Orion DC-DC 24-12 into my lithium setup to support 12V loads and I was planning to connect that _after_ the Smart Battery Protect. Having thorough look into the SBP manual, it says that "The short circuit protection of the BP will be activated if you try to directly connect loads with capacitors on their input (eg inverters)". Does Orion have capacitors that could cause short circuits, or is it fine to connect it as I intended?


bezda asked
sponk answered ·

2 Answers

Smart Battery Protect - Programs

I have the Smart Battery Protect in my system in my motorhome which also comprises of:

3 x 110ah AGM batteries - 2 x 270w panels - MPPT smart solar controller - smart battery protect - 500w inverter - 40a charger -

I have two questions I cannot find awnsers to anywhere:

1) what does "under voltage restart" mean/do in the program settings for the second value. Eg. 10.5/12V

2) What program should I use to protect my batteries The default cut-off of 10.5V seems far too low from everything I am reading.

All advice greatly appreciated I am pulling my hair out here!

alan-baker asked
wkirby answered ·

1 Answer

Help with simple Off-Grid Setup 48v EasySolar + LiFePo4


i'm starting my plans about a simple off-grid solar setup, built around EasySolar 48/5000 and LiFePo4 Batteries.

My goal of the setup is to have one normal european AC 230V-16A output, so that i can plug in for example a washing machine (most of them reach 3200W while heating the water), or simply all electronic products suitable for AC 230V outlets. That is why i chose the EasySolar 48/5000, that offers around the wattage necessary. Also the ability to load this with an external power source. So this is fix.

About the size of the batteries, i am not sure yet if i need double Ah, or if 100Ah is enough, but this is easy to exchange, when i know that all other components are in a correct setup.

I would really appreciate someone looking at the simple setup plan to check:

- if all the components kind of fit and work together,

- if some important parts are missing,

- if it could be simpler or less components (= cheaper, but i dont think so, its super simple already),

- what special connection cables i need, that dont come with the main products,

- is a 250A Fuse behind the batteries right? (the BatteryProtect has a Maximum Peak Current of 250A so i figured this would be fine...)

I am new to Lithium-Batteries and the VE.Bus BMS, so especially there i am not sure, if all connections are correct. Or if the VE.Bus BMS is the right BMS for me... Also i saw inverted and non-inverted remote cables. What do i need?

- do i need something like a battery balancer? it seems to me that it does not make sense with Lithium-Batteries...or am i wrong?

Im looking forward to someone leaving a statement to this setup and my questions.

Thanks in advance :)


habi asked
habi commented ·

1 Answer

blue power panel

i have a multiplus 24/3000/70, bmv 700 monitor, i`m now buying a blue power panel, can i use the shunt from the bmv monitor to the BPP or do i need a new shunt?

and which cables do i need?

pontus7 asked
Alexandra edited ·

1 Answer

LiFePo4 Smart Battery with multiple VE.Bus BMS allowed?


the short question is: is it allowed to use in one system multiple VE.Bus BMS?

My Plan is: One VE.Bus BMS is connected to a single 25,6V 200Ah Smart Batteries, and this I have 6x. So in total 6 BMS systems and 6 Batteries. All 6 BMS Systems are connected with Ve.Bus. The Relay for the Load disconnect in case of a low voltage I want to install on each batterie, so the batterie can disconnect from the system and not the load! Will this work? How this Bank will then displayed on the Color Control GX?

We are building boats with an AGM bank and I want to change this to LiFePO4 Batteries. The reason why I didn't do this was, because I don't like the logic of the Victron BMS system. I checked a lot Victron battery circuit suggestion and the logic was to be able to shut of the charge sources with a signal and the loads with a relay. Other manufacturers separate the battery from the system with a relay, which I like more because one bad batterie doesn't turn off the hole system.

The system now:

  • Battery Bank: 24V AGM 14 x Victron 12V 200Ah
  • Inverter: Quattro8000VA
  • Charger: Skilla-i 24/100
  • Alternator 2x 110A
  • Display: Cerbo GX with Touch GX
  • DC Loads 7x 300A to 600A each!

When I have to follow the Victron circuit suggestion for the Smart LiFePo4 Batterie, I have to use to each load a separate big relay, but for this I don't have the space! So I want to put the Relay on the Batterie, this means the batterie is disconnecting from the Batterie Bank, not the loads.

If this is not possible, do you have other ideas? I Could use the Victron 25,6/50 Super Pack with a build in BMS, but to reach 30kWh I need 30 batteries and for this I don't have the space.


offshore asked
offshore commented ·

2 Answers

MPPT -> BP100 E1 Error & Absorption

I'm experiencing an issue whereby the BP100 from my MPPT 50/100 is erroring with E1 in the following situation:

1. Temperature drops below BMV-712 Relay trigger amount during the night (5c)
2. BP100 is remotely disconnected via BMV-712 relay
3. Sunrises
4. MPPT in Bulk shows a PV voltage but no current (obviously, BP100 is still disconnected)
5. At some point MPPT moves to Absorption
6. Temperature rises to reset BMV-712 Relay trigger (6c)
7. BP-100 errors with E1, with MPPT still in Absorption

At this point I disconnect the PV fuse to reset the MPPT and BP100, when I reconnect fuse MPPT goes back into Bulk and BP100 works as expected.

- I have the MPPT connected to the BP100 Input and battery to the Output so as it's not reversed
- The distance between my battery and BP100 / MPPT is all of 30cm
- The distance between BP100 and BMV-712 is about 50cm
- I'm 90% confident there isn't a short-circuit, I previously wired the remote disconnect to the wrong BP and the whole system was working as expected (apart from the low temperature MPPT disconnect)

See circuit diagram attached.

adrian-duke asked
adrian-duke edited ·

0 Answers

220a battery protect


I’m fairly new to this so please forgive me if I sound stupid lol

I just wanted advise on my wiring and if everything is correct, especially the wiring to and out of the 220a battery protect. I’ve attached a picture of what I plan to do

I want to integrate the bp in my 12v setup. I read that I couldn’t connect the bp inline with an inverter so I figured i would be ok to connect it directly onto the aux battery?

With my battery charger (redarc bcdc40d - wiring diagram included in picture below) it states that the low voltage disconnect (which in this case is the victron 220a batt protect) should be AFTER the battery and then to loads

Example: batt charger/solar regulator - aux batt - bp - loads

Victrons wiring diagram states that bp should be BEFORE the aux battery then to aux battery and then to loads.

Example: batt charger/solar regulator - bp - aux batt - loads

Also my bcdc charger has an inbuilt solar regulator in it so I’ll be connecting a fixed solar panel directly to that, but if I wanted to connect an extra solar blanket with its own regulator, would I connect that directly to the bp or directly to the battery.

I’ve heard that solar panels and maybe even battery chargers can make current go back through in the opposite direction so I’m basically trying to figure out in which order the bp goes and what I connect before/after as I want everything to flow in one direction through the bp (in to out) like the instructions say.

I’m also thinking of scrapping the bp altogether and connecting a relay to the bmv-712 smart to trigger a low/high voltage cut off but I can’t seem to find a simple diagram on how I would wire that up. If anyone has one, I would be extremely grateful if you could share that with me.






raffadee asked
raffadee commented ·

1 Answer

Battery Protect 12/24 220A - No Settings to support AGM typical low voltage cut-off recommendations?

We need to protect an off-grid solar system that is primarily used to power an 240VAC 80W sewerage system aerobic pump that is supposed to operate 24/7 and at least 4 hours per day in unattended use (private camp-ground). The battery is a Eclipse Power 280AH Deep Cycle AGM. We have purchased a Battery Protect BP220 to provide a low voltage cut-off to inverter however I notice that the highest low voltage cut-off on the BP220 is only 12.0V [Setting 8]. This is way too low in my research which should be 12.5 to 12.8V. When there is poor light or after use at night, we need the battery protect to kill the load until the batteries are charged sufficiently. Am I using the right product? Are there alternate settings?

Cycle Use Initial Charging Current less than 75A.
Voltage 14.4V~15.0V at 25oC (77o F)
Temp. Coefficient -30mV/oC
Standby Use No limit on Initial Charging Current
Voltage 13.5V~13.8V at 25oC (77o F)
Temp. Coefficient -20mV/oC

andrew-heath asked
andrew-heath edited ·

0 Answers

ESS selectivity and circuit breakers

Hi All,

today I had a short circuit in the Critical Loads section on my ESS. All circuit breakers in between grid and the short circuit switched off. Whereas I was expecting that only the circuit breaker of the circuit itself should be switched off.

now I’m searching for some design rules to better design selectivity in case of ESS.

The connection to the grid is made by 25A fuses (3 phase). So to maintain selectivity I have a 3P-16A circuit breaker between the switch board and the Multi’s. I estimated that adding an ESS creates its own energy system but now I realize that under normal circumstances the relais between grid input and Critical Load output is closed. Following the NEN1010 selectivity rules I then have to use 10A circuit breakers to individual circuits. But that means I have to swap my complete household switch board because it now contains 16A circuit breakers which is quite normal in Holland. And it also leaves me in a non preferred situation since 10A is far to low for some off the systems I’m using (dishwasher, etc.).

I have systems on the non-critical side of ESS like EV, heat pump and so on. They have there own 16A circuit breakers.

Perhaps someone can help me with some suggestions to create a save and reliable system? Or is what I described the way to go (using selectivity and see the multi as a intermediate device).

kind regards,


hetslimmehuis asked
seb71 commented ·

1 Answer

Smart BMS CL 12V 100A - Charge and Load Disconnect

Hi All

I am planning using the BMS CL to sit between Lithium house batteries and Alternator. I plan connecting the BMS CL to my EasyPlus with the 'Cable for Smart BMS CL 12-100 to MultiPlus' (PN: ASS070200100). This mean the load / charge disconnect plugs on the BMS CL are now being used by the EasyPlus.

My problem is - I have other loads / charging sources (independent of the EasyPlus) that I also want to disconnect when the BMS commands it.

Can I simply tap addition wires in to the load / charge disconnect terminals on the BMS CL - to control multiple battery protection devices ?



miya asked

0 Answers

Smart Battery Protect ignoring load disconnect signal

My smart battery protect seems to be ignoring load disconnect signals. I suspected some short circuit or back current, but even with output disconnected, it's still on when I pull the load disconnect wire. Any ideas what could be wrong here?

bezda asked
bezda commented ·

0 Answers

Orion-TR Smart - input and output to same source

Background: I'm considering a boat setup where an Orion-TR non-isolated would charge a Lithium house battery from the lead/acid starter battery (standard setup, per Victron docs). The house battery is also charged by an Victron MPPT Controller/solar panels. I would like the solar/mppt to charge my starter battery in an emergency. I think I can achieve this by (a) disconnecting the Lion House batt and (2) setting my 1-2-both connector to "both". These two steps together would connect the MPPT to the starter battery and isolate the house battery, giving the starter battery the full solar charge.

This emergency setup would leave my Orion in-line and out-line both connected to the same battery terminal (the starter battery positive). Is this safe to do? The manual says that all models are short circuit proof, so I'm thinking yes, but I'm not sure this situation is actually a short circuit.


jfhbc asked
jfhbc commented ·

2 Answers

Connecting Battery Monitor BMV-712 with Battery Protect BP-100

How can I connect the relay terminal of the BMV-712 battery monitor with a BP-100 battery protect? I want to disconnect the battery in case the capacity of the battery has reach a defined percentage. I only can programm the cut off voltage off the BP-100, but I want to use the capacity information from the BMV-712.

adversor asked
leno edited ·

1 Answer

Smart Battery Protect BP-65, internal LED.

Hello world :-)

I want to use a Smart BatteryProtect BP65 just to protect the 120Ah LiFePo in my caravan while my caravan is in its winterplace from Fiday until maybe end of march,

(During winter season, only thing connected to the the battery is the GPS tracker.)

I had no problems with connecting or function of the BÜ65 yet but i miss something in the manual: there is an internal blue LED left below the 7-Segment display that has a differnet behavior to the LED IN the 7-Segement display that is described in the manual.

Atm on my desk, connected to battery without load, the LED in the 7-Segment Diplay blinks once every 5 secs (what shows Output status = on). The LED below blinks once a second.

Does anyone have the missing description for what this LED shows?

Best regards from Germany...


topsan asked
topsan answered ·

4 Answers

Smart Battery Protect says OUTPUT DISABLED BY REMOTE

Smart Battery Protect says OUTPUT DISABLED BY REMOTE and because of that I can't use any of the 12V devices.

Can someone advise as to why there is no power going out to my 12V distribution board from the SBP100?

And the same why no power going to the Battery from the SBP200 ?

Both are saying that they have been "Output Disabled by Remote"

Many thanks

1. SBP100 for load disconnect


2. SBP for Load disconnect


3. SBP100


4. SBP200


5. BMV readings.


6. As you can see the negative voltage is coming to the negative feed of the 12V distribution. And 12 V positive feed going to SBP "IN" field, but nothing goes out to the loads.



8. SBP flashing lights


Mike Salaru asked
Mike Salaru commented ·

1 Answer

Newbie question: Is "Intelligent Battery Life" the default?

Just got a 75/15 MPPT charge controller after reading about how the controller will turn off the load so the battery will fully recharge. Is this the default behavior? Can I just hook up the wires and go? I don't have anything to configure it with. Thanks!

cburns asked
cburns commented ·

1 Answer

MPPT always shows 14.2V when Smart Battery Protect disables charging

Hi all,

I have used the Victron automotive wiring example for my 12V Sprinter build. Everything works fine, but I was wondering about one thing. To disconnect the MPPT charges a Smart Battery Protect 100 is used:


Now, if the BMS recognized f.e. high cell voltage it uses the remote control of the BP and no current is going to the lithium batteries. So far, so good. Instead of the "normal" shunt in combination with the BMV used in the schematics I use a Smart Shunt only. The Smart Shunt shares the cell voltage with the MPPT via VE.Smart network.

Now I have recognized the following. Everytime when the BP disconnects the current from the battery the MPPT shows a battery voltage of 14.2V even if the Smart Shunt battery voltage is only 14.0V (which is correct and verified via bluetooth connection to the smart lithium batteries).

Is this normal behaviour or am I doing something wrong?

The Smart Battery Protect is set to mode C (Lithium-Ion). The MPPT is using the Lithium Ion preset with a absorption voltage of 14.2V and float of 13.5V.

Thansk in advance


tschoeki asked

0 Answers

Smart Battery Protect - What's in the Box?

Hello everyone. A very simple question - with a Smart Battery Protect 12/24 - 100 and 220 versions, are the green, screw-type wire connector blocks included in the box, for both the two and three wire connectors? Thanks.

Can I expect similar inclusion of cable connectors with other products?

valden asked
wkirby answered ·

1 Answer

LiFePo4 Smart and Battery Protect on the charger side going into short circuit after restart

I had a scenario where the batteries told the ve.bus BMS "allow to charge:NO" because the battery temperature was below 5°C - well one battery was, see my unanswered question here:

Since I never got an answer for this, I am using the BMS and the temperature of the battery as measured internally as the "source of all knowledge" to control the chargers, rather than the temperature reported by the BMV-712.

This in turn turned off the battery protect on the charger side (I have 1x BlueSolar 150/70 and 2x SmartSolar 150/35 there)

All good so far.

However, when the temperature increased, and the BMS changed to "allow to charge:YES" the Battery Protect (configured in Li-ion mode) eventually went to error E1 - short circuit.

When I measured the voltage on the charger side of the BP it was ~30V - battery side was ~26V.

I then disabled the chargers using Victron Connect, restarted the battery protect by removing and replacing the remote connection from the BMS, waited until the BP had configured, then restarted the chargers one by one.

The system came up.
Obviously I don’t want to have to do this every time the system shuts down due to low temperature.

Any help appreciated.

jasontav asked
rpetrovski-forum answered ·

2 Answers

How to connect a Victron battery protect between power inverter and battery

I currently have a small, off grid solar system - 100amp deep cycle sealed lead acid battery, 100 watt foldable solar panel, 20A charge controller and a 12V/750watt power inverter.

The power inverter is currently connected directly to the battery but I am concerned about over discharge if there are multiple consecutive cloudy days.

I purchased a 100A Victron battery protect. I am confused as to how to connect it to the battery and power inverter in order for it to prevent the battery from being over discharged.

  1. Does the power inverter connect to the battery protect and then the battery connect to the battery?
  2. Which connection do I use on the battery connect - IN or OUT?
  3. Where does the battery connect negative/black wire connect?

rwkoehler asked
michelg commented ·

2 Answers

Battery protect 100A temperature under load

I have a 100a battery protect setup for my charging sources. I am running about 90 amps through it and have noticed that it gets rather warm after an hour or so of charging <60 degrees.

Is this normal?

my setup is a 12 volt lithium, I have followed the 'van installation' and I am using a B2B charger that supplies the 90 amps.

richardp asked
richardp edited ·

1 Answer

Does this schematic look ok - any improvements

I have added a lithium battery to my motorboat and I am proposing to connect it as per the sketch below. I already have the shunt, smart shunt, mppt and battery chargers. From my research I think it will work? Be interested in any comments, suggestions for improvements, thanks.


madian asked
Rob Fijn answered ·

1 Answer

Orion-Tr prevent backfeeding?

I have a 24v system in my Fifth Wheel RV. I have my DC loads connected through a BatteryProtect. One of these DC loads is an Orion-Tr 24/12-9 which I use as a maintainer on a lawn mower battery. This small battery is used purely for cranking my Onan generator as well as the uninterruptible 12v DC power source for my trailer brakes if the break-away is pulled.

My challenge is that the break-away is wired such that it draws power from the battery directly in parallel to 12v being provided by the 7-pin trailer harness on my truck. When I have my truck connected, it will provide 12v power to the battery and my question is will this also feed back through the Orion-Tr and try to go back through the BatteryProtect. I am aware the BatteryProtects should only be used in one direction so I want to understand am I putting my system at risk with this configuration or does the Orion-Tr prevent the backfeeding of power from the truck towards the 24v battery bank.

I can simply pull the associated fuse in my truck to not power that pin in the harness but want to know if this is in fact needed or not.


cookinwitdiesel asked
cookinwitdiesel commented ·

1 Answer

When to use the Active High and Active Low on Smart Battery Protect with Smart BMV-702?

I am struggling to understand when to use the Active High and Active Low on SBP with Smart BMV-702.

I have a SBP 220 as charge disconnect connected to solar and vehicle starter.

1. Would I connect the "L" or "H" to the BMV-702 from SBP ?

2. Would I connect to the Normally closed(NC) or Normally open(NO) on BMV-702 input?

Can you please explain your answers.

*The BMV-702 itself is connected by COM to VE.BUS BMS "Charge disconnect" input.

Mike Salaru asked
Matthias Lange - DE commented ·

1 Answer

Intermittent fault with Smart Battery Protect

I have a Smart Battery Protect 12/24 100A being used as part of a lithium system with a VE.Bus BMS and an Orion 24/12- 70. Basically, I am using the Smart Battery Protect in Li-ion mode which is controlled by the load disconnect on the VE.Bus BMS, this circuit is the supply for the DC House panel.

The problem I am having is that there is an intermittent fault where the Smart Battery Protect gets stuck on “Attempting to activate” (in Victron connect) and causes the RV interior lights to constantly flash on and off. Occasionally after being stuck on “Attempting to activate” for a while, it will display an E1- Short circuit error (both on the unit and in Victron connect); however, I am 100% certain that there is no short circuit. Sometimes it will work fine for hours, and then if the breaker for the house panel is switched on and off it will then get stuck in this fault and it is nearly impossible to get it working again.

So far, we have tried a second DC-DC Converter, a second working battery protect and are still getting the same fault. The cable runs to the input and from the output of the battery protect are appropriately sized, and the BMS is in the same compartment so the ground wire and the load disconnect to Remote H on the battery protect are only approximately 0.5m. We have since discovered that we can trick the battery protect into working every time it gets stuck in this fault by briefly touching a 24V supply on the output of the battery protect.

Has anyone experienced this problem before and discovered a solution?

linky asked
nick-peck answered ·

4 Answers

BatteryProtect remote reconnect


I have a not-smart BatteryProtect
I'm using it to cut-off a system in mode 7, so when the system voltage drops below 11.8V it cuts out.

Once it has cut out I manually remove heavy loads from the system, allowing the voltage to recover. The problem I have is the system voltage doesn't always go back to above 12.8V (it typically goes back to around 12.6V). Other than increasing the voltage for a bit to above 12.8V, is there a way to reset it? Does using the remote cause it to reconnect? (I don't want to change to mode 1 with 12V reconnect)


ac00per asked

0 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
bathnm answered ·

3 Answers

Smart Battery Protect does not allow charging from MPPT 100/50

I am using 2 SBP in my setup. One for my loads (works like a charm) and one for over charging protection for my MPPT and Buck Boost DC DC Charger.

The SBP used for charging determines the voltage produced by my solar panels as the current battery voltage and shuts off, when <14.2V. It thereby prevents me from charging my battery. Can someone tell me, how to get around this issue?

Thanks in advance.

lennart-linde asked
Alexandra answered ·

1 Answer

Is there any issue with connecting the battery protect to the DC output of a charger controller?

Is there any issue with connecting the battery protect to the DC output of a charger controller, instead of directly to the battery terminals?

alex-nathanson asked

0 Answers

MPPT 75 / 15 shows higher battery voltage

I have installed a MPPT 75/15 with 2 solar panels attached (in series 24V) and for battery charging I added 2 * 12V AGM batteries in series = 24V. In addition I have a Phoenix inverter 24/375 connected to the batteries to power my garage door motor. The installation went fine and the door opening was OK also for 2 days. This morning I did control the door mechanism but everything was dead. The inverter shows a slow blinking red light and green led blinking fast (2 times). This should indicate a low input voltage alarm at some point in time. I checked the battery and it shows 21.8 V (for both in series) which is low. The solar panel delivered voltage is OK, all cables are properly set and the MPPT battery connectors show also 21.8V and displayed steady green led -> float condition ?! When I call up the connect app on my iPad, the battery state is reported as 27.8 V instead of the actual voltage on the connector? When I disconnect the battery, the app continues to show that higher voltage. Can it be that the app does not reflect the physical battery voltage but displays the MPPT charager output that it "wants" to deliver to the battery? So, how do I see the actual battery state with that app and how can I resolve the problem with the inverter showing "low input" after every power off/on test. The data sheet says that low voltage is around 18.4V which is lower than the current battery voltage. Are the batteries dead and what could have been the cause when there should have been a shutdown of the inverter when it might be gone below 18.4V? I currently have no direct connect to the inverter to "look into its settings". Btw: There are no other power connections to the MPPT directly. Its only the inverter for the door (chamberlain MV700 which should use around 130W for the opening/closing time). I have tested the door opening at least 15-20 times without problems and the MPPT green light always stayed on.

hlwerschner asked
Matthias Lange - DE commented ·

2 Answers

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