All our fire trucks are fitted with isolation switches. We either leave the engine idling, or we stop the engine then physically disconnect the batteries. The r

All our fire trucks are fitted with isolation switches. We either leave the engine idling, or we stop the engine then physically disconnect the batteries. The reason is that all the radios and gear drain the battery so quickly without the engine running. Having a hybrid style setup that cut the engine in or out as required when stopped on scene would be awesome.