Hi
I have a customer who has a narrow boat with an Outback system, I am just trying to find out if and which Victron system would be best compatible
More elaboration on what you are contemplating is needed here.
What outback part? Mppt inverter? Is it a replacement or an addition, what are you wanting to add if so?
Technically compatibly is not an issue as they don’t need to talk to eah other to work.
Outback communication protocol is proprietary, and they won’t share.
So no communications for monitoring or control are possible between outback and Victron.