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nuckolls.bob(at)aeroelect
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 Posted: Mon Sep 09, 2019 9:08 am Post subject: Aux Battery Idea Was: Speaking of Aux Batteries |
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| Quote: |
Here's a work in progress. Obviously not complete, no alternator shown, lot's of detail omitted, etc, but the starter contactor power is shown. That's the key, unless I'm missing something. |
There are no 'timing' issues with using
a second battery for brownout protection.
Consider Z-35 for second battery and
simply leaving the aux battery relay
open until after the engine is running.
Bob . . .
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nuckolls.bob(at)aeroelect
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| Posted: Tue Sep 10, 2019 5:14 am Post subject: Aux Battery Idea Was: Speaking of Aux Batteries |
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At 03:01 PM 9/9/2019, you wrote:
| Quote: | Thanks Bob,
What is the cost of accidently leaving the aux battery on during start? Is it just a sag, or does starter-sized current try to run through the small relay and associated wiring? If the main is weak, will the aux battery work that much harder? I'm concerned that a relatively simple mistake like leaving the aux batt on during start will do some damage.
(I've put switches in the wrong position before...) |
Make the aux battery switch two pole
with second pole wired to disable
the starter contactor any time the aux
battery is ON.
Bob . . .
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