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Old Yesterday, 03:45 PM
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Thanks Guys, all very helpful information. I appreciate it!
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Old Yesterday, 04:43 PM
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So. Cal.
Joined Oct 2004
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Originally Posted by RedOctobyr View Post
Cool testing, Mark!
Thanks Red!

Here's some similar testing I performed when charging 6S packs...


Originally Posted by RedOctobyr View Post
You really want your input voltage at least 1V above or below the voltage range you'll be charging. And above is preferable. With higher voltage, the charger pulls fewer amps, which helps keep it cooler.
If charging at high current, you'll want the source voltage to be at least ~2.5 - 3.0 volts higher than the output voltage to compensate for charger and wiring losses. I've found that lowering the source voltage makes it easier to avoid the buck-boost transition, with negligible effect on overall charger efficiency.

When charging 3S packs at high current from an inverter generator, it's best to avoid ~12.5 - 15.0 volts. When charging 6S, it's best to stay at or below ~24.0 volts or above ~28.0 volts.

As Red clearly states, this poses no issue when charging from wall power provided you're not operating at the limit of your power supply.

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