Victron Orion XS DC to DC remote on/off

DIY
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1

Last piece of the project. Everything solar in my camper is Victron, except the DC to DC charger which is Renogy. I bit the bullet and bought a ORION XS 50a DC to DC charger. Ready to install it but a bit confused on the remote switch options. I know I can disable the Orion through the Victron app on my phone, but I want to be able to turn it off with a switch like I did with the Renogy. The switch is already installed in the control center and I’d like to use it. #1, do I simply remove the jumper between “REMOTE L-H” and install a single pole single through switch across L and H? I read somewhere that the voltage between these two contacts is 70V. This is the spec on the switch currently installed…SPST, 16 Amp @ 125-250 VAC, 3/4 H.P. @ 125-250 VAC, 10 Amp @ 14 V (T), 3 Amp @ 125V(L) UL/CSA/VDE approved…Am I good to go?

2

Should be read as “up to 70v may be applied to the H terminal.”
A regular SPST switch can be used, with a voltage rating being at least your battery voltage.
Only a few mA will flow between the H & L terminals.

3

I must admit I find this confusing also. The manual sets out 4 choices for using the remote on-off terminals:

  1. Switch between L & H
  2. Switch between V+ & H
  3. Switch between GND & L
  4. Connect “VE.BMS charge disconnect” and H

However, as far as I can tell, NOWHERE does it make clear how the operation works.
For example, if using option 1, does closing the switch turn the unit on or off? Or does it toggle operation? Ditto for option 2. Ditto for option 3.

Surely this is basic information. Have I missed the obvious? Apologies if I have.

Can anyone shed any light?

P.S. I assume the answer for #1 is that a short between L & H turns the unit off, even though the unit comes with the bridge in place, simply because the first instruction in the manual on setting up in charger mode is to remove the bridge. But that doesn’t help with the rest…

4

Ah. Have I missed the obvious? Possibly I have.

Re-reading the manual (the English section - interestingly enough the French section doesn’t have this extra information - I don’t speak Dutch, German, Swedish or Czech) it seems that the answer may lie in the subtle use of “On” or “on-level” (e.g. “on-level impedance”, “on level > 3V”, etc), hence:

  1. Switch between L & H: unit is ON when closed (technically when L-H impedance is < 500Kohm)
  2. Switch between V+ & H: unit is ON when closed (technically, when voltage at H-pin is > 3V)
  3. Switch between GND & L: unit is ON when closed (technically, when voltage at L-pin is < 5V)
  4. Connect “VE.BMS charge disconnect” and H (that’s just a connection, no switch).

Now this contradicts my assumption (see PS (post-script) in previous posting). Can anyone explain or help me understand further?

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5

Thanks Everyone…Very helpful!