Huntsville, Alabama, USA based DC charging solutions specialist Balmar have designed a new low-cost / high value Alternator Protection Module, offering surge protection. Balmar APM devices can be used to protect all alternator brands, excelling in both short duration and longer duration spikes, where other products fail.
Mounted conveniently on the rear of any alternator, the Balmar APM is designed to absorb voltage and current spikes that commonly occur in many onboard electrical distribution systems from intermittent connections, disconnects and over-voltage events.
Lithium battery adoption has introduced a new problem if a battery disconnects due to an internal fault or issue. A battery-initiated disconnect during charging can induce a voltage surge which will damage the alternator’s rectifier diodes or internal regulator and render the unit inoperable.
The APM will clamp up to a 60-volt spike and sustained over voltage conditions beginning around 20 volts. The APM can absorb multiple surges of such energy to continually protect an alternator and other devices on the electrical distribution network. Visual and audible alarms indicate if the device has been compromised and needs replacement.
The Balmar APM family meets ISO 16750-2 for Load Dump Protection and ISO 7637-2 for Surge Protection. The APM can be deployed to protect either Balmar or other manufacturer’s charging systems.
https://balmar.net/product/apm-12/
https://balmar.net/product/alternator-protection-module-apm-24/