Dan Marotta wrote on 1/5/2021 10:48 AM:
On 1/5/21 11:41 AM, Eric Greenwell wrote:
the ones for gliders are usually chosen to optimize charging of 12 volt batteries with PWM
charge controllers, and using an MPPT controller on those panels will gain little extra
charging.

I'd like to see a proof of that...

Which statement: glider panels chosen to optimize PWM, or MPPT controller won't help with that
type panel (ie, low voltage output)? In general, though, the big difference is PWM is more
efficient with low voltage panels (like 18 volts), and MPPT is more efficient with higher
voltages (at least 24 volts, 30 is better).

Do you have the specs for your Stemme panels?

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1