I noticed that when I start the van’s engine, the Orion XS seems to charge at about 600W. (I look forward to getting the Orion XS properly integrated into the console and VRM Overview.) Anyways, when the Orion XS charges, the amount reported from the solar panels drops. For example, if I’m getting 120W from the roof panels, when the engine is running, the amount from solar drops to about 20W and returns to 120W after turning the engine off. What’s going on? When I’m driving in the sun, I’d like to charge with both solar and the alternator.
Please post the settings for both devices. I suspect a difference in voltages may send the MPPT into float. Have you enabled DVCC on the GX?
Thanks for the reply. Here are some screenshots of the settings? (Is there a better way of doing this? I looked for a way to dump everything into a text or json and couldn’t find it.) DVCC is enabled
Thx. Screenshots are maybe more user friendly to a broader non-geek audience 
so fine for me. So you have a Lynx Smart BMS, which Victron Smart Lithium and what are the settings for the MPPT?
Also have a read if not already. “Temperature-compensated charging is not required for lithium batteries; Disable temperature compensation or set temperature compensation to 0mV/°C in your battery chargers.” It may be best to take the van to an qualified installer who can check everything over.
I have 3 330Ah. I’m not sure where to find the setting you’re looking for. Are these them? And where to I turn off the temperature compensation? I can’t seem to find it anywhere.
Thanks so much.
After observing the behavior for sometime, the solar and Orion do seem to indeed be additive when the battery is around 80%-90% or lower. When the battery is almost full it will turn off the solar.
This is absolutely correct, when the battery is nearly full there is a limit to the power it can absorb as the voltage reaches the required 14.2V, so one of the chargers has to reduce. The same happens on my boat, low SOC alternator and solar charge, as it gets full, solar reduces.