If you are using lead acid batteries and have no plan to change to LiFePo4 (Lithium) batteries I would recommend a Progressive Dynamics PD9260 converter. It's a "deck mount style which can be mounted in any convenient location as it's not integrated into the power distribution center.
If planning on upgrading to "Lithium" batteries in my opinion one of the best converter/chargers for either is the Victron Phoenix IP43 12/50 unit. Bluetooth feature allows one to set custom charging profiles (or use pre-programmed ones) and monitor it's operation via smart phone. Also does not require cooling fans so it's totally silent.
Installed with a Victron BMV-712 or Smart Shunt monitor and it adjusts it's output voltage to insure the desired charge voltage at the battery is met. In short it compensates for voltage drop between where it's installed and where batteries are located. Can eliminate the need to upgrade existing wire size to improve charging. The factory installed wire is usually enough for dc power use requirements from distribution panel but when charging (often close to upper end of wire rated capacity) the voltage drop causes charging to drop to lower float voltage prematurely.
Yes, the Phoenix charger is more expensive but good things often are. In this case it's well worth it and I'll never change from mine.
A note on 30 year old Converter/Chargers. Most all were single voltage output units, usually around 13.2 volts. Some might have had the ability to "jumper" or switch to a higher voltage (~13.6v) to speed charging when using a generator. Multi-stage Converters with automatic "Boost; Absorption; and Float" charge levels didn't arrive until the late 90's-early 2000's. My 1995 TT was a "Single" and my 2018 was a "Multi" (which is now a Victron Phoenix).
Aussieguy---
Bad converters can often cause a breaker to trip. OP didn't say "BreakerS" just mentioned a single breaker which is mostlikely the one powering the converter.
