The Blue Sea Systems ML-ACR Automatic Charging Relay (Model: 7621-BSS) is a top - notch solution for managing large battery banks. It automatically takes charge of charging two big battery banks and enables them to be paralleled for emergency starts. With a 500 - Amp continuous rating, it's a perfect match for high - output alternators. Its magnetic latch design consumes very low current. The dual - sensing feature keeps an eye on the charge of both battery banks. The start isolation can temporarily separate house loads from the engine circuit during cranking to safeguard sensitive electronics, and the engine isolation can separate two running engines to protect engine electronics and boost alternator output. This 500 - Amp magnetic latching relay combines batteries while charging and isolates them when discharging or starting the engine. Specifications include a tinned wire control circuit connection, 24V DC nominal voltage, and more. The package includes an ML - ACR Automatic Charging Relay 24v and an SPDT Remote Control Contura Switch - ON - OFF - ON.
Using the Blue Sea ML - ACR Automatic Charging Relay is easy. First, make sure the voltage of your battery banks matches the 24V DC nominal voltage of the relay. Connect the control circuit using the tinned wire provided. The relay will automatically start managing the charging of your two battery banks. For emergency starts, it allows the battery banks to be paralleled. When starting the engine, the start isolation feature can be used to protect sensitive electronics by temporarily separating house loads from the engine circuit. Remember, the engine isolation feature can be set up to separate two running engines to protect engine electronics and increase alternator output. As for maintenance, keep the relay within the operating temperature range of - 10°C to 60°C. Check the terminal stud torque regularly to ensure it's at 140 in - lb (15.82 Nm). Also, make sure the cable size is 4/0 AWG x 2 to meet the ratings. If you need to replace any parts, use components with the same specifications as the original ones.
