We are heading to winter (north side of the world at least) and our sun is giving less power.
Some Tempest devices are sitting in the shade most of the day, some don’t see any sun at all. In summer time this is mostly not a real problem but in winter … The battery can run the Tempest quite some time but without a few hours of sun (more than 300w/m^2) on a regular basis, it will deplete. And as it goes down, the power saving modes kick in to help it stay afloat as long as possible. We hear people say their Tempest doesn’t detect rain … but they didn’t look at the battery voltage. Once it is in mode 3 the haptic sensor is turned off completely, hence no rain detection.
Before opening a support ticket or a topic on this forum, please do check your voltage and siting of the Tempest. Often relocating it where it sees direct sunlight is enough to get it going again.
Compare the solar radiation graph and the battery voltage. The battery will really start to charge above 300w/m^2. If your solar radiation graph shows none or very short periods above that level, your battery will not keep up. Several days (cloudy days for ex) should not be a problem. Once the sun shines again, the Tempest will charge quickly to nominal again.
If you still feel it is more than a siting problem, do report here or you can contact customer support and we will help you out.