10 Wp solar panel, two 3400 mAh Li-CoO2 18650 batteries in parallel, permanent small ~50 mW load. A shunt regulator limits battery voltage to 4.1 V. An externally powered ESP32 measures sol and bat powers for ThingSpeak.
Observing and monitoring state of Charge of Lithium battery
WEATHER STATION -nodemcu+dht11+bmp180 -logging time 10 minute -beta-version of the project -added deepsleep -added battery+voltage monitoring
Controllo remoto tensione batteria impianto / Progetto: https://drive.google.com/open?id=1dyJ6W54aup2fywxa2t8q-lSQKZJpncLl / Negozio: https://www.ebay.it/str/zetaelettronica
Displaying data output from a MPPT PCM6048 solar charger. The solar charger handles 6 X 195 Watt solar panels. Battery bank is 24 Volt. Capacity is 400 Ampere Hours at 24 Volt