The Unlikely Rise and Collapse of the Bulgarian Computer https://youtu.be/t-UVPw1c_So?si=QMAmTX1Cj4jtb-rs
U-channel object

Since I can't be bothered to learn SketchUp, I asked ChatGPT to create a Ruby script that produces a configurable U-channel object. It worked down to the millimeter from the first attempt..
Boxing vs product size

Boxing vs product size. What a waste?
My introvert nightmare at a concert

My introvert nightmare, at a concert
Raspberry Pi 5
Considering whether to buy the new Raspberry Pi 5.. who am I fooling, I know I'll end up getting it anyway. Resistance is futile
Coral TPU is here

The Coral TPU is here, will add to my home assistant + Frigate tonight Setup complete. Only tricky part was to disable “protected mode “ for Frigate in order for it to recognize the TPU on my rPi4 running HASS OS 10.5; Currently running it on two cameras, CPU load is at 25-35%. Automations based…
Astronomical autumn starts today with a heat wave

Astronomical autumn starts today with a heat wave 🙂
This bug is huge and feeds on our flowers’ nectar

I am not sure what this bug is, but it is huge and feeds on our flowers’ nectar
Stratification in the DHW tank

Stratification is clearly visible when heating the DHW with PV excess + electrical heating element instead of the heat pump. Might add a destratification pump to fully utilize the 300l volume, top reaches 80°C, the bottom remains at 30°C; This might also pose a legionella risk
IKEA’s DIRIGERA hub in my home assistant setup

Integrated IKEA’s DIRIGERA hub and few of their smart products in my home assistant setup. Oddly, there’s no native support for the hub, I had to register it as a HomeKit device. Anyway, all is working well now and automations are kicking in as expected
Google Coral USB Edge TPU for Frigate NVR + home assistant

Ordered a Google Coral USB Edge TPU to use with Frigate NVR + home assistant. Seems quite overpriced, I hope it isn’t a disappointment
Optimal water flow rate with water fan coils and ASHPs

Useful paper on optimal water flow rate when using water fan coils with ASHPs https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=1079&=&context=ihpbc&=&sei-redir=1&referer=https%253A%252F%252Fwww.google.com%252Furl%253Fq%253Dhttps%253A%252F%252Fdocs.lib.purdue.edu%252Fcgi%252Fviewcontent.cgi%25253Farticle%25253D1079%252526context%25253Dihpbc%2526sa%253DU%2526sqi%253D2%2526ved%253D2ahUKEwie-KTRrpqBAxUR_rsIHXSNB-0QFnoECAsQAQ%2526usg%253DAOvVaw2pcuVvNGpbzC9GJPuL3RF7#search=%22https%3A%2F%2Fdocs.lib.purdue.edu%2Fcgi%2Fviewcontent.cgi%3Farticle%3D1079%26context%3Dihpbc%22
Checking the noise level on our Mitsubishi ASHP outdoor unit

Checking the noise level on our Mitsubishi ASHP outdoor unit
Inverter and battery firmware update time

Inverter and battery firmware update time..
Fluid flow rate in my ASHP running in cooling mode

Reduced the fluid flow rate in my ASHP running in cooling mode, for a healthier flow/return differential temperature. Seems to have worked, obvious COP increase is visible clearly:
Heat pump’s been battling outdoor temps up to 32-36°C

In recent days, our heat pump's been battling outdoor temps up to 32-36°C in cooling mode. With an EER (think of it as cooling's COP) of 3.81, it's an efficiency superstar – and all this is running purely on solar power
Enjoying Greece for few days

Enjoying Greece for few days 🇬🇷
Our own solar panels provided for 91% of our energy needs

Relying less on the grid this month, as our own solar panels provided for 91% of our energy needs.
Old Nissan Leaf battery

Got this in case an old Nissan Leaf battery decides to show up at home
Heat pump at home

Prepping for the installation of a new heat pump at home in the next week or so, but not exactly thrilled about the imminent entropy surge So it begins.. The external unit and the internal hydro box are now mounted and the refrigerant lines are pressurized with Nitrogen for a 24h leak test Progress on…
Wishing this was possible in the EU
Wishing this was possible in the EU.. https://x.com/Tesla/status/1666808948643471360
Tomorrow’s PV production estimate for our system

Tomorrow’s PV production estimate for our system is near 44kWh. We’ve sized it to support future EV charging. Currently, we can’t self-consume that much, and grid feed-in is complicated by local bureaucratic obstacles. Hate to see it go to waste.
It is temporary and perfectly safe

It is temporary and perfectly safe, I promise. #WCGW
35 and 45 WiFi devices at home

How many WiFi devices at home is 'too many'? We have between 35 and 45 depending on who's home and which devices are active. A mesh network of four routers provides the needed coverage.
Grid is down due to a storm

Grid is down due to a storm, our @froniussolar emergency power switchover kicked in, so.. we have power again 🙂
Ancient iPad mini 2 as a home-assistant dashboard

Repurposing an ancient iPad mini 2 as a home-assistant dashboard. 3D printed a stand for it. #reuse
Old Nissan Leaf batteries to a Fronius GEN24 inverter

Thought I was done with solar system spending, but then someone develops a way to connect old Nissan Leaf batteries to a Fronius GEN24 inverter. Now remains to make a compelling case for this new budget dent to my better half. https://github.com/dalathegreat/BYD-Battery-Emulator-For-Gen24 Repeating in my head: "want != need"
My device de-zombification tool

My device de-zombification tool:
Домашна фотоволтаична система моя опит
Това звучи интересно 😉 https://dev.bg/event/iot-izgrazhdane-na-domashna-fotovoltaichna-sistema-moyat-opit/
UltraFires, hoping they don’t live up to their name

I'm uncertain about the thought process behind this battery manufacturer's brand name and logo. Both seem to have been deliberately crafted to raise eyebrows. Hack charging those odd-sized “UltraFire”s, hoping they don’t live up to their name and catch an ultra fire
98% energy self-sufficiency today

Achieved 98% energy self-sufficiency today #solarpower
Power Flow Card Plus visualization

Just integrated the "Power Flow Card Plus" visualization into my #HomeAssistant system. Loving the seamless synergy with every aspect of my #Fronius ecosystem, from #SolarPV to battery, #EV, surplus hot water tank diverter, and grid usage.
