Garmin Fenix 6s solar, slowly, weak charging.

How much charge in the battery?

Contact Garmin Support. A quick search of the forum will show you others have reported similar along with comment and suggestions from Garmin representatives.

Off all additional functions. May be this step help to save energy.

2792389 said:

Nothing had happened. See solar graph, but no real charging.

I read somewhere that when charging with solar energy, the battery is not charged directly. Instead, the battery is relieved by the solar energy being used directly by the watch, so that little or no energy is needed directly from the battery during solar charging. This extends the watch's operating time between charging cycles.

The watch contains a LI-ion battery that is sensitive to continuous charging, overcharging or complete discharging. For the life of the battery, it is best to charge it only with a flat charge curve, i.e. 30%-80%.

So it is not surprising that the battery symbol does not show increasing capacity during solar charging.

Sent email to support with solar graph and description.

Thanks.

One more thing. Keep in mind there is an overheat safety. If you put your watch at direct sun the charge might stop after reaching some temperature (depends on your ambient temp as well). I suggest you disable all wireless connectivity (airplane mode) and check the charge in your car with A/C enabled on some sunny day. You will definitely see the battery charge increasing slowly.