Specifications are subject to change. See bluesea.com/products/7605 for current information.
5
Battery Temperature Compensation
Battery temperature compensation is output voltage regulation based on battery temperature variances. Since batteries
can see extreme temperature differences, it is important to regulate output voltage with temperature to maximize battery
life. A battery in a cold environment should not be charged at the same voltage as a battery in a hot environment.
The BatteryLink® Charger is set at a baseline of 25°C. If the included battery temperature sensor is installed, then
any variance from this baseline will result in a change in output voltage. Voltage will decrease at higher temperatures,
and increase at lower temperatures. The temperature sensor also allows the charger to react to extreme hot or cold
temperatures (below -20°C or above 45°C) by reducing output or shutting down to preserve the battery. Reference the
Installation Instructions on page 6 and the Full Installation Diagram on page 8 for details on how to install the battery
temperature sensor.
Automatic Charging Relay (ACR)
The BatteryLink® Charger includes an integrated 65A Automatic Charging Relay (ACR). The purpose of an ACR is to
combine batteries for charging, but leave them isolated for discharge. This works well with dual battery systems, where
non-starting loads are isolated from the engine starting battery to reduce the risk of being stranded on the water without
enough power to start your engine. The ACR in the BatteryLink® Charger will combine the auxiliary and start batteries at
or away from the dock. This means both batteries will be charged during AC powered charging, or when AC power is not
available and a secondary charging source is active, such as your engine’s alternator. The ACR includes an optional Start
Isolation feature, which can be used to prevent engine starting current being drawn from the auxiliary battery. Start
Isolation protects sensitive electronics wired to the auxiliary battery from being affected by voltage sags or spikes caused
by engine starting. Reference the Installation Instructions on page 6 and the Full Installation Diagram on page 8 for
details on how to wire the Start Isolation feature.
LED Status Indicators
Name
States
AC POWER
Green solid
AC power present
Off
No AC power
BATTERY
Green solid
Charging complete – Float/rest stage
Amber solid
Charging in progress - Bulk or absorption stage
Red single blink
Battery hot - Charger shutdown (>=49°C, recovers at 47°C)
Red double blink Battery hot – Output reduction (>=45°C, recovers at 43°C)
Red triple blink
Battery cold – Charger shutdown (<=-20°C, recovers at -18°C)
Red solid
Battery polarity reversed
Off
No AC power
ACR STATUS
Green solid
Combined – ACR closed
Double-blink
SI present, battery temp outside range of -20°C to 49°C,
or reverse battery polarity detected - ACR open
Off
Battery voltages below threshold – ACR open
REMOTE LED
CHARGE
STATUS
DC Power
Solid Combined – ACR closed
Off
Separated – ACR open
AC Power
Solid Charging complete – Float/rest stage
Flash
Charging in progress - Bulk or absorption stage
Or error state - See charger LEDs
