Join Date: Jul 2001
Thanked 32 Times in 31 Posts
Rep Power: 19
Re: Using Diesel To Charge Batteries
Idle? Thanks to eh for trying to define that. Back in reply #17 on page 2, the skipper mentioned doing a workaround to get his alternator to output in ANY MEANINGFUL AMOUNT.
That's the key.
Idle on our M25 engine, per eh's fine post which DEFINED "idle", will GET DIDDILY SQUAT out of our 100A alternator.
Unless skippers have specifically selected low rpm alternators on their boats (and I'm betting only a handful of those here do), then IDLE to charge makes NO sense.
You NEED to up the rpms so that the alternator can produce voltage and current.
For me, this can be between 1500 and 2000 rpm. I cruise at 2500 with a WOT of 3000.
Glad to see glazing has gone the way of the dodo bird, though.
Stu Jackson, Catalina 34, 1986, M25 engine, Rocna 10 (22#), Maple Bay, BC, Canada