I've been a big fan of victron stuff for ages now and get great performance from my small 100/20 mppt smart solar.
I've installed an Orion 12-12/18 in my camper trailer to charge our AGM battery bank while on the road.
When it first turns on, I get about 16a but this rapidly decreases to about 8a. This is having a big impact on the state of charge at the end of the day's driving.
Anyway, I've read the other threads and am aware of the derating at high temps. I can't really monitor the temps while on the road so opened up the battery compartment and give it the touch test. I wouldn't say it felt hot, or even warm before the charge current dropped down.
There's a real lack of useful information in the connect application. Very vague.
It's all cables with 16mm² cable and the fact it runs well for the first few seconds makes me think something else is up.
Could it be a configuration problem or do they just derate at very low temps?
I'm pretty miffed about it. The lack of ve networking doesn't help matters. All round I think the Orion range fails to meet expectations but would love some insight into possible fixes.