Meet the Mastervolt BI703 BI Series Battery Isolator—the smart way to split charge current across multiple batteries with minimal energy loss. This 70 Amp isolator is designed for 3-battery configurations, ensuring reliable, independent charging for 12V or 24V systems.
-
Three battery outlets provide separate charging paths for up to three batteries, keeping banks balanced and ready to power your on-board devices.
-
Charge Mate for connecting and/or disconnecting two batteries, giving you simple control over battery configurations.
-
Battery Watch to monitor battery condition and it can also function as a main switch when needed.
-
Solid-state, compact design with corrosion-proof materials and aluminum heat sinks; built to withstand marine and on-board environments with no moving parts to wear.
-
Easy installation with molded diode splitters, end plates with connection lugs, and solid bolt connections with nuts and locking rings.
-
Charging capability Max output charger 50 A; Max output alternator 70 A for robust charging performance.
-
Voltage drop handling The diode voltage drop (~0.6 V) can be compensated by adjusting the charger or alternator output, or by using Mastervolt Mass chargers or Alpha Pro regulators with automatic voltage drop compensation.
-
Specifications Dimensions: 8.1 x 5.5 x 3.1 in; Weight: 2.4 (approx. 1.1 kg); Number of battery outlets: 3; Compensation diode: No.
| General specifications |
| Number of battery outlets |
3 |
| Dimensions, hxwxd |
8.1 x 5.5 x 3.1 inch |
| Weight |
2.4 |
| Technical specifications |
| Max. output battery charger |
50 A |
| Max. output alternator |
70 A |
| Compensation diode |
No |
