Quote:
Originally Posted by XCR-700
This boat is a 2018 and I think its all part of a "better" high-tech design,,,
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Correct. ACRs are the standard approach in modern marine electrical systems to keep a house battery topped up without having to fiddle around with selector switches. The standard scenario lets your starting battery get priority charging, ensuring you are never likely to be left in a situation where you cannot start the engine and return home safely.
If you want to keep a closer eye on things, the Veratron Linkup battery monitor is easy to install and supports NMEA2000 connectivity to an MFD along with Bluetooth for your phone:
https://www.defender.com/product.jsp?id=7317232
I have these on all my battery banks, it shows state of charge, voltage, current draw, etc.