EDIT: Please scroll down for latest diagram version.
Trying to sort out my electrical system and hoping for some feedback. Below is my first draft, and is very subject to change.
PlanePower 60A main alternator
B&C SD-8 backup
IBBS backup battery
Garmin G3X system w/ all the goodies
GTN-625
2 p-mags.
Please take a look and let me know what looks off or recommended changes. In particular I have the following questions:
- Does it make sense to use the keep-alive on the GAD 27? Would be nice to keep the endurance bus live during startup but I can't figure out what amperage it can handle. Clearly in the current setup it doesn't work as there is no power from the main bus during startup so it has no power to keep-alive with. How are people wiring the GAD 27?
- What is the preferred method to set up the sd-8 to come on by itself? I have heard setting it's regulator voltage low is one way? Can I set some sort of alert so I know when this happens? Maybe a Master Caution on the G3X based on voltage drop to the setpoint?
- The G5 has it's own battery but should I also have it on the IBBS so it is the battery of last resort? i.e. when the ibbs dies I still have the internal G5 battery?
- I'm wondering if I even need the ibbs backup battery anymore with the spare alternator and GAD 27 providing keepalive power. Granted the SD-8 can't keep everything running indefinitely but it would add a good bit of time to my main battery runtime. I can get things down to under 8a fairly easily by load-shedding the e-bus if need be.
- What's the right spot for the starter contactor? Should it be wired to the e-bus so I can start the engine only when that is energized?
- What else am I missing?
Trying to sort out my electrical system and hoping for some feedback. Below is my first draft, and is very subject to change.
PlanePower 60A main alternator
B&C SD-8 backup
IBBS backup battery
Garmin G3X system w/ all the goodies
GTN-625
2 p-mags.
Please take a look and let me know what looks off or recommended changes. In particular I have the following questions:
- Does it make sense to use the keep-alive on the GAD 27? Would be nice to keep the endurance bus live during startup but I can't figure out what amperage it can handle. Clearly in the current setup it doesn't work as there is no power from the main bus during startup so it has no power to keep-alive with. How are people wiring the GAD 27?
- What is the preferred method to set up the sd-8 to come on by itself? I have heard setting it's regulator voltage low is one way? Can I set some sort of alert so I know when this happens? Maybe a Master Caution on the G3X based on voltage drop to the setpoint?
- The G5 has it's own battery but should I also have it on the IBBS so it is the battery of last resort? i.e. when the ibbs dies I still have the internal G5 battery?
- I'm wondering if I even need the ibbs backup battery anymore with the spare alternator and GAD 27 providing keepalive power. Granted the SD-8 can't keep everything running indefinitely but it would add a good bit of time to my main battery runtime. I can get things down to under 8a fairly easily by load-shedding the e-bus if need be.
- What's the right spot for the starter contactor? Should it be wired to the e-bus so I can start the engine only when that is energized?
- What else am I missing?
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