Poor solar chargement since 19.01 update

Massimo said:

Is it possible to find stock firmware version?

A fall-back release version is included in every beta package. 

Thank you for the fast reply. In your opinion which is the best realease until now?

No idea, I gave away my Instinct 1st gen a year ago, and use Instinct 2 now. However, your problem is most likely just a problem of battery gauge calibration - it goes frequently haywire after a firmware update, and needs to be recalibrated by soft-resetting the watch, and going through the full charging cycle (overcharging it first, even if it already shows 100%).

I can confirm this. On 19.1 even in direct sun the watch doesn't charge. I have done a soft reset, hard wipe factory reset, full charge and nothing. The damn thing just doesn't charge in the sun.

I placed my instinct solar directly under the sun with no clouds, and after 1/2 hour, battery days left did not change at all. Thinking for returning this watch. It’s too bad it has much potential. 

Having similar issues after the last update. I've had my instinct solar for almost a year. I've power cycled it and charged it fully. Now it thinks it's at 100% after a few days of use and won't charge in the sun.