Charles in SC
Well Known Member
Does anybody have opinions good or bad about what is the best charger for a 680 type battery?
TIA!
TIA!
Does anybody have opinions good or bad about what is the best charger for a 680 type battery?
TIA!
Does anybody have opinions good or bad about what is the best charger for a 680 type battery?
TIA!
(note - never run any avionics or electronic ignition with a battery charger connected).
Because most battery chargers are for just charging a battery and do not have the filtering to keep out various spikes, ripples and other such noise. Look at the pMag install manual - it specifically states ?do not run with a battery charger connected?. Why risk a $10K GTN-650 or whatever on it?It seems plenty of people do this...why do you say not to?
Why not just have a real power supply that emulates the alternator. That way you can:
- Charge the battery if needed.
- Run your panel for an indefinite period of time (note - never run any avionics or electronic ignition with a battery charger connected).
- Run you panel on the bench as needed.
Whatever your choice, disconnect it when not in use.
Carl
Does anybody have opinions good or bad about what is the best charger for a 680 type battery?
TIA!
If you do even a quick VAF search, you'll find many threads that more or less confirm the following:Does anybody have opinions good or bad about what is the best charger for a 680 type battery?
TIA!
Because most battery chargers are for just charging a battery and do not have the filtering to keep out various spikes, ripples and other such noise. Look at the pMag install manual - it specifically states ?do not run with a battery charger connected?. Why risk a $10K GTN-650 or whatever on it?
Now considering a real power supply is about the same cost, does so much more, and puts out a nice regulated voltage why do anything else?
Carl
So I don't have PMags, and thus don't know about them so can't comment, but isn't the *battery* the thing that absorbs any spikes, ripples, etc.? That, plus all modern electronics can handle pretty much anything thrown at it short of a huge spike (lightning-caused, perhaps).
This sounds like the same reasoning that erroneously tells us to leave all avionics off during engine start...the mysterious "spikes" that will destroy modern electronics (they're actually *sags*, and no they won't).
As for PMags...not being familiar with them, but how would you "run" them with a battery charger connected?
Again why bother with a battery charger when a real, regulated power supply does it all so much better at about the same cost? A bonus is that it is a great way to power the panel while it sits on the...... Carl
I?ve seen a lot of harmonic noise coming out of a battery charger. Avionics do not typically add filters for such noise. Batteries will absorb over voltage DC spikes, but not RF noise. This RF will just float on the buss. While typically the noise is just a massive annoyance, it will not cause damage unless you really have a junk charger.
For the voltage sag issue when cranking, I know the Dynon SkyView will not be harmed (but may still get a restart) but I have never gotten the same assurance from Garmin on their expensive GTN-650. As such I keep that side of the avionics off during engine start.
On the pMag, power is on but control is off when you time them.
Again why bother with a battery charger when a real, regulated power supply does it all so much better at about the same cost? A bonus is that it is a great way to power the panel while it sits on the bench if needed.
And since you set the output voltage on these power supplies (just like your alternator) you eliminate the ?I fried my battery? when the old school charger you forgot to disconnect climbs to 16+vdc.
Carl