Hello,
We are designing a hardware-level fail over system and would like to verify the behaviour of the Orion XS1400 when configured in power supply mode.
We will have 2 Orion XS1400 devices connected directly in parallel (they will have the same cable lengths for input and outputs).
The outputs of both of the XS1400 devices will be connected to a common DC distribution bar and supplying our system (as above the devices will be in Power supply mode).
XS1400 (A) is fed from our normal service supply.
XS1400 (B) is fed from a backup supply.
We cannot allow energy to be drawn from backup (B) path routinely, instead it is to sit idle unless the output A is unavailble.
If we set the outputs of the XS1400 as follows:
XS1400 (A) = 28.0V
XS1400 (B) = 27.5V (example level, this could be set higher if needed)
We are wondering if this will ensure that the energy is pulled from the A lane with B doing no work?
*Edit* from original post:
Q1) How much delta between parallel device output is acceptable?
Q2) Does the Orion XS1400 contain active reverse current protection on the output stage?
Q3) Do you forsee any issues here with the outputs intentionally set apart e.g 0.5V (or maybe 0.25V)?
The equipment downstream is fine between 18-36V.
Best Regards
Thankyou for the link, I am aware of Kirchhoffs law.
I should have included :
Does the Orion XS1400 contain active reverse current protection on the output stage?
How much delta between parallel device outputs is acceptable?
As it is designed to sit between two batteries and Victron states - " Separation of the starter battery and the service battery (2.2 Features)" - so that it’s not bidirectional, for sure it has, at least as a consequence, not as a design.
With your delta example, there is no problem.
In fact Victron names it “source prioritization” - but don’t know where I’ve seen it.
For example, if you have:
- Solar charger: 28.6 V
- Shore-power charger: 28.3 V
- Backup DC-DC charger: 28 V
The highest-voltage source supplies the load. The others remain idle until the bus voltage drops below their setpoints, automatically taking over if the higher-priority source becomes unavailable.
So, to conclude:
Victron states that XS1400 can stand between batteries.
XS1400 can have output voltage adjusted.
Anytime the output battery can happen to have its voltage bigger than output settings of XS1400, as I didn’t see anywhere that if you connect an XS1400 to a battery, that battery should not be supplied by anything else.
All these, leads to conclusion that your reasoning is sound.
Hello Alex,
Thankyou for taking the time to reply to this question in detail, I will look up the source prioritization as you mention, this being the type of thing I was hoping would be the case - these XS1400 (s) will be running as power supplies, no output battery (just a load).
Apologies for asking a silly question, but how does it (usually) work on this community / support forum? Will Victron comment with a definitive answer?
Best Regards
No, Victron will not comment.
For the declared status, look here: Guidelines - Victron Community
If you stay and read enough, your opinion will no doubt take shape.
However much it needs to be. 0.5V sounds fair, but due to voltage drop caused by the load, maybe that needs to be higher. Or can be set lower even.
Yes, otherwise it would be a rather bad DC/DC battery charger. That the output voltage is higher than the input voltage is a frequent situation when charging a battery.
No. The Orions should do just fine in power supply mode, since thats a simple constant-voltage mode.