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Lydart avatar image

Phoenix 12/375 remote switch not working

Just bought a Phoenix 12/375 and want to use my Smart Battery Protect to control the remote switch on the inverter. The inverter is connected directly to the battery and a cable from the SBP output is connected to the left hand terminal of the remote switch.

Do I leave the remote link wire in place or should this be removed?

Phoenix Inverter
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Do I leave the remote link wire in place or should this be removed?

A link in the phoenix or SBP? What model SBP?


8 Answers
WKirby avatar image

I have worked this out with my SBP.
I connect a 2.2KΩ resistor from the SBP output to GND. This should be sufficient to pull the SBP output Voltage down below the threshold for the inverter remote input. The resistor will burn up 0.06W when the SBP is on.

MOSFETs leak a little, it is one of the parasitic characteristics of this type of transistor.

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Lydart avatar image

Thanks @WKirby

That is my fall back option but I want to check to see if Victron have a solution to this issue. I am concerned that there may be a problem with the SBP. I just find it strange that the official wiring diagram for controlling the remote on/off of a Phoenix inverter may not work. Both the SBP and Inverter are brand new and I have wired my system as described in the manuals. If this is indeed an issue with the SBP it is better that we are all aware and that it is acknowledged and documented.

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Hi @Lydart

you can program a shutdown voltage in the inverter, this will also shut down the inverter.

Lydart avatar image Lydart Daniël Boekel (Victron Energy Staff) ♦♦ ·

Hi @Daniël Boekel (Victron Energy Staff)

I know you can program the inverter via VE.Direct, but that would involve the purchase of another cable (USB or Bluetooth) for a single use. The Victron manuals clearly state that the inverter can be switched on and off by a SBP. So either my SBP is faulty or the your published manuals are incorrect.

I am just asking for official clarification on the above point

Hi @Lydart

We're trying to find a solution for this, next week there will be an official answer to this.

I do have to say that the programming cable gives a couple of nice features to set (stop-start voltage, etc)

Lydart avatar image

Hi @Leverg

I have a Lifepo4 battery bank and the manual says that dynamic cutoff is irrelevant for these batteries. I would also need to buy a bluetooth dongle to enable that option . So I'd rather use the SBP to control the inverter.


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Leverg avatar image
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Lydart avatar image

@Justin Cook - Bay Marine Supply USA, I did remove the bridge before I connected the wire from the SBP and the inverter is not triggering on/off. I checked the voltage at the SBP and they are identical to the readings at the left terminal of the inverter remote. I guess the question is, What should the voltage be at the SBP output when it disconnects the battery from the load? Should it be 0.0v instead of 1.6v?

I also followed wiring instructions to ensure there was no reverse current through the SBP.

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Justin Cook - Bay Marine Supply USA avatar image

@Lydart, the black jumper wire must be removed from the remote bridge when wiring in a remote trigger such as you're describing. Have you done that and the inverter is still not triggering on/off as it should?

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Lydart avatar image

I have used this wiring diagram from the latest SBP manual.

I've tested the SBP and it works apart from turning off the inverter. Checked the voltage at left terminal of the remote and it reads 13.23v when SBP active and 1.643v when off.

The inverter will not switch off at 1.643v.

Any ideas on a fix?


inverter.jpg (9.2 KiB)
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Hi @Lydart

what kind of DC-loads are there? is the same thing happening without DC loads connected?

Lydart avatar image Lydart Daniël Boekel (Victron Energy Staff) ♦♦ ·

Hi @Daniël Boekel (Victron Energy Staff)

Just for context, this is installed in a VW T6 California.

There are 7 DC loads:

  1. Fridge
  2. 12v Sockets x 3
  3. Internal lights
  4. eberspacher parking diesel heater
  5. Buzzer alarm for SBP
  6. Smart BatterySense
  7. Remote connection to Phoenix inverter

1,2,3,4 are switched off

I have not tested with the DC loads disconnected.

Lydart avatar image Lydart Daniël Boekel (Victron Energy Staff) ♦♦ ·

Hi @Daniël Boekel (Victron Energy Staff)

I have disconnected all the dc loads apart from the connection to the remote on/off switch of the inverter and it makes no difference. The inverter still remains on.

Does this mean the SBP is faulty and needs to be replaced?

Lydart avatar image

The link in the Phoenix. It's a SBP65.

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