April 7, 2019 solar collector filled with water, new controller connected, graphs in real time will be here:
O_2019- air temperature, K_2019- collector temperature, B_2019- boiler temperature

A new generation solar controller is being tested. The esp8266 processor (ESP-12E module) connects to the Internet wirelessly (WiFi), controlled via a web browser from a computer or mobile phone. The Beta version of the app is here. Short-term data can be stored in its internal memory and plotted. Can be connected to the most popular smart home management systems. I hope to have a working layout by the beginning of this season. Here are photos of the control interface and processor:

In 2018, the collector is filled with water and the season started on April 12th. It was sunny spring from April 1, but I still did not believe that there would be no frost.
The season ended on September 26th. There are no temperature charts, I’ve eliminated everything, and I did not get ready to sort things out. I hope next year everything will start to work properly and on time.

2017 collector filled with water and the season began on May 1st.
The season ended on October 1.

Here is a reference to the charts

Pictures.

Versijos v1.23 pagrindu padarytas v1.4 maketas . Viskas sumontuota ABS plastiko modulinėje dėžutėje montuojamoje ant DIN bėgelio (53.3×90.2×57.5 mm).
Versijos v1.4 maketas (dar bus aprašymas tikslinamas)

2015 spalio 8 dienos vakare iš sistemos buvo išleistas vanduo. Saulės mažėja, naktimis neigiama temperatūra. Jau reikia šildyti namus, taigi naudos iš kolektoriaus nebedaug. Sezonas buvo labai ilgas.

Made 10 pieces controller PCB. Description

Investigation of heat transfer losses