For our caravan I am looking to upgrade/optimise the 12V system.
At the moment there is a 90Ah 12V lead-acid battery which when we are off-grid runs the lights and 12V outlet to charge phones/tablets.
When plugged in the battery is charged from the mains 230V supply using a Reich C-Go 20A charger. This charger in turn, also acts as an isolator for the 12V coming from the car. So when the caravan is plugged in the car and the engine is running the caravan battery is also charged from the car.
I want to replace the lead-acid battery for a LiFePO4 battery but I need to limit the current to protect the car and wiring between the car battery and the caravan. Ideally I want to limit the current from the car to 10A because of the small gauge wires that re typically used in cars and caravans in Europe.
My first idea was to take a Victron Orion smart DC-DC converter which basically does everything I want except two things. The most important thing is that there is no way to limit the current. The smallest version is 18A DC which is to much for my application. The second disappointment is that it doesn't have VE smart networking. Victron sadly never gives out information on when or even if devices get an update.
The Victron 25A Buck-Boost converter does have the current limiting function that I seek but it is more than twice the price of the Orion. It also lacks VE smart networking and you need to use an ancient Windows application to change the settings.
What would be a good and cost effective solution to my wishes? I don't mind spending money but I don't want to overpay for equipment that is half finished.
I would really like to see that Victron takes one of their smart solar MPPT chargers and create a truly smart DC-DC converter from it. I looked into using a MPPT charger for my application but I quickly learned that it is a bad idea because of how the MPPT system works.