My tempest has been in power save mode now for about 5 days voltage is registering 2.33-2.35, it’s been cloudy, first issue I’ve had since it arrived last year. Should I be concerned?
A Power Booster Accessory is in development by WeatherFlow which will take care of that exact issue. Availability is unknown at this time, however. I see your battery level is 2.34v “LOW.” Some have used artificial light. . .like a 2000 to 5000 lumens LED Work Light and place Tempest in front of it for something like 12-18 hours.
Just had a look in more detail, your battery charging versus solar radiation. I’m not 100% sure but I feel it is not charging as it should and drains pretty fast
Open a support ticket and ask if they could have a look mentioning my findings. If confirmed they’ll help you out.