Hi,
I have an Orion 12|24-15 Non Iso DC-DC charger. Its input is a 12v starter battery on a Sprinter and the output is a 24v Li-Ion pack and they share a common ground.
I have been seeing strange charging issues and over-voltage alarms. On closer inspection the voltage shown in the app for the Orion doesn't match what I measure at its terminals with a meter.
These 2 images show the exact same time but a difference of 0.35v. Its been worse than this on other occasions and reads both under and over randomly.
Has anyone seen this kind of issue before on a DC/DC? Its on the latest FW, could it be a fault in the unit or my setup?
Additional Info
All Bluetooth devices have the latest firmware available in the Victron App.
As I am measuring at the terminals I dont expect cable or connector losses to be an issue here. I also have a good bit of other Victron kit on the same 24v side which all agree with the multi-meter consistently under < .1v difference . All the kit is connected on the 24v Side via a Lynx distribution unit with cable well within its ratings. Connection tightness double checked. As mentioned earlier sometimes the voltage in the DC-DC app reads over sometimes under and it seems to move around day to day.
Heres a comparison of readings:
| Device | Reported Voltage |
| Orion 12|24 - 15 (Output) | 24.2 |
| MPPT Smart Solar | 23.88 |
| Orion 24|12 - 30 (Input) | 23.9 |
| Smart Shunt | 23.85 |
| Multimeter | 23.85 |
Any advice or questions welcome. Many Thanks!
Martin.
