Background
About 5 years ago we renovated our complete house. During that time we spend a decent amount of money on a number of shellys to drive our roller shutter. Unfortunately the have a design flaw which let them die over time. Since I didn't like to pay another 25 Euros per unit, I decided to solve it the maker way.
Investigation
First of all I spend some time to find out what the root cause of the issue is. Fortunately it's relatively easy to find the specified information since it happens alot on the first generation of the 2.5pm model. A capacitor relevant to the voltage control is failing due to the temperature and build quality.
Findings
Since the panasonic capacitor counterparts of this model are only about 17ct each, I decided to go for these. Boards are also recommending them, since the voltage is specified a bit higher, which goes also for the build quality.
The workdesk with the shelly board
Getting to work
The only downer was my lack of having a well working desoldering tool. I went for a Yihua 948D-I, which, after the first use, was a no-brainer. 25 years ago, during my vocational school period, I was really into soldering. We had Weller tools and they were great soldering stations. I didn't want to spend so much on it, so it was also one from Yihua. It's fairly good enough and has plenty of functions I will never make use off.
Shelly with old and new capacitors
Summary
In the end it was a real rewarding experience. I renewed my soldering experience and also got my shellys to work again. Every one of these little guys were booting up successfully after changing their run down capacitors. Furthermore they do their service on my home assistant instance without any issues. 🚀