Anyone ever try to use this with a dual cell super capacitor?

Just to clarify it here, as it cost me quite some time: the 3.3V converter on this module is not suited for driving ESP8266/ESP32 boards, they usually require a startup current between 200 and 400 mA for several tens of milliseconds (~40ms) which this module cannot provide. Once it is running it might be enough to support it, but not if WiFi connectivity is required! I tested several ESP boards (D1 mini, NodeMCU Amica) all don't come up as after less than 1ms the supply is cut due to some over-current mechanism. So these boards (provided they can handle the voltage) need to be connected directly to the battery, as it is depicted in the connection plan in the description.

The FireBeetle example is a bit confusing: the power seems to be delivered from the pads on the solar power manager to the battery input on the FireBeetle. But the pads are also marked as "IN" - how does that work? Are the pads actually supposed to be output, or they're simply connected to the JST battery in and in this example both the FireBeetle AND the solar power manager are connected to the LiPo battery in the picture?

Haven't had any luck getting this to charge a lipo battery. Battery hasn't been charged even after leaving it in the sun for 10 hours.

Does anyone have an idea what the problem is. The solar panel delivers 2.3V and 60mA at SOLAR IN but at BAT IN only 1.5mA are available (with 4.1V).
Even with 100mA from the solar panel, only 1.5mA arrives the battery. It is therefore not possible to charge the battery with such a low current.

Yes it could accpet 1.5V, as long as the current is under 70mA.

What is the power loss/efficiency of the unit?

Hi support,

Is it feasible to combine the circuit with a stronger solar panel (e.g. 2x Sunpower C60 cells in serial connection at a combined nominal/open-circuit voltage of 1.0/1.4V)? --- as my purpose is to supply a 3.3V temperature sensor in a shadowed/low-light situation... so I believe that two Sunpower cells (nominal 3.6Wp each) may be sufficient even in such conditions?!? But - as in bright light the Sunpower cells are supplying up to 7A (!), I'm wondering if the solar power manager circuit provides a over-current protection?

Thx & kind regards

Hello, I would like to connect amorphous cells like Panasonic AM1454: https://panasonic.co.jp/ls/... Does the Voc need to be less than 4V or just the Vope/Iope? Also, Powerfilm has panels that can be wired in parallel under 4V:
https://www.youtube.com/wat... https://www.powerfilmsolar.... If I wired 4 or 5 in parallel, it would still be the same voltage as they have confirmed. If it produces 1.89mW at 1000 lux for the LL200-2-4-75 (and 1.089mW for the LL200-3-37), I could potentially generate 4-7mW (2.4mA-4mA) indoors.

I noticed the maximum charge current is 70mA. Is there a minimum limit to charge a 3.7V battery (I have 650mAh for example)?

I am interested in powering a microcontroller that uses the same power as the charging speed, or one that averages the same amount of power in average use compared to the average amount of idle powering of ambient light (12-hrs, etc). Thank you.

Yes, you can use it without a battery. However please be aware of that solar power is unstable. It may damage the sensor if giving unappropriate power supply.