Thor Forums

[Beau388]

Originally Posted by SuperBoar

Everybody has different systems, but on my 2017 Vegas 24.1, the emergency start switch must be held down for several minutes so the coach batteries can quick charge the chassis battery.

True The emergency start switch simply uses the house battery charging system (coach's alternator and chassis) to connect the connect the house and chassis batteries even if the engine is not running. So if the house batteries are low and the generator cranks slow, using the emergency start usually will supply enough current to start the generator. The converse is also true. The reason to hold the switch down is the capacity of the Trombetta relay or the BIC. The Trombetta can handle about 100 amps and the BIC about 60 amps continuous. The generator's starter need s 60 amps and the V-10's starter needs 400 amps, so it takes a while to move those amps from one place to another. Good jumper cables will move about 400 amps.