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Safiery Pty Ltd ABN: 87 624 588 807 45/8 Distribution Court, Arundel QLD 4214 (07) 210 22 55 3 safiery.com Confidential and Proprietary. Copyright Safiery Pty Ltd 2025 Scotty Ai is protected by International Patent o In the unlikely event the battery relay opens quickly before the BMG is completely shut down, the stored energy is called a “load dump”. The digital response speed of SCOTTY AI V3 is in milli- seconds resulting is a tiny amount of contained energy. This very small, contained energy reverts o Safiery use Manual Service Disconnects (from EV Industry) installed on Safiery 48V battery circuit and connect the High Voltage Interlock feature of these MSD’s to SCOTTY AI V3 to prevent the BMG from running should the battery be isolated. This is a key requirement as if solar is connected, the 48V reading may remain high. Without an interlock, arcing and fire risk may occur. Second Alternator Position or Only One Unit replacing Factory Alternator: o SCOTTY AI V3 can be mounted outside of the engine bay with a waterproof NMEA style connection to the BMG data plug. The actual 48V power goes directly from the BMG to the auxiliary 48V battery system. In this setup, the BMG would be in a second alternator position in the vehicle or on the marine engine. On the marine engine, if the engine power is low, the second alternator position is opposite the primary alternator to balance the load on the crankshaft. SCOTTY AI V3 can be connected in several ways as further described in this document. o SCOTTY AI V3 can be mounted outside or inside the engine bay with the BMG replacing the factory alternator and the 12V or 24V DC-DC feed from SCOTTY AI V3 charging the lead acid starter battery. In this scenario, there is just one unit, the BMG, attached to the engine. The additional charging from a second factory 12V or 24V alternator is then not possible. Mild Hybrid and Free Power Control described in this document is still possible. 2. Initialization: o SCOTTY AI V3 determines if the mode of operation is power generation or charging or idle. o SCOTTY AI V3 initializes battery parameters State Of Charge, State Of Health and checks for alarms from the battery BMS. Charging Control at 48V from the BMG: o SCOTTY AI V3 drives the BMG with real-time torque and speed whilst monitoring the output Voltage and Current and making control adjustments. o SCOTTY AI V3 determines the optimum voltage and current charging parameters based on battery voltage, state of charge, charge current limit and temperature. Should the battery temperature be below the safe charging limit, SCOTTY AI V3 will not charge. o SCOTTY AI V3 changes the real-time torque and speed when the battery approaches maximum State of Charge; and/or the BMS Charge Current Limit indicating the battery is approaching maximum charge state. o The BMG is a vector controlled permanent magnet generator with additional windings on the stator for high power output at idle. There are no windings on the rotor, it is completely inlaid with permanent rare earth magnets. There are no diodes as with conventional alternators. As a result, efficiency of the generator is 90% and the inverter/controller connected is 94% giving a combined 85% round trip efficiency. Compare that to a traditional alternator at 60-70% when hot. External regulators like Wakespeed 500, Balmar or Zeus control the field current on traditional alternators. They don’t achieve this level of efficiency and are a field control add-on. There is no comparison. Safety is number one feature Load Dumps are controlled: o SCOTTY AI V3 stops the BMG should the battery voltage start to reduce suddenly indicating Battery relay is opening to stop over charging.
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