Fronius smart meter died at 4am today, leaving the solar system inoperable. No obvious signs of damage. Luckily I had a spare and replaced it, but wondering what happened..
Fronius smart meter died at 4am today
DEV.BG tech talk: Intelligent Synergy: Heat Pump, PV & Home Assistant
My DEV.BG tech talk on making the heat pump, the PV system and Home Assistant work together β slides and video, in Bulgarian.
Rooftop PV installation
Why rooftop solar is a hard sell in Bulgaria and how I did it anyway β the full story of my PV installation, from permits to first kWh.
25kWh or 86% of our consumption is self-generated
Impressive PV production today considering it is November. Managed to squeeze out 25kWh or 86% of our consumption today is self-generated.
Fronius Smart Meter
Received the Fronius Smart Meter, it limits the power export of my yet-to-build solar roof installation. Exporting power here is a bureaucratic hell, I will not subject myself to it by zeroing on the export. The inverter itself, a @froniussolar Primo GEN24 5kW due in 3 months π
RFM69 library for further power consumption savings
Having an interesting discussion with @LowPowerLab's Felix on optimizing his RFM69 library for further power consumption savings, check it out here: https://lowpowerlab.com/forum/rf-range-antennas-rfm69-library/rfm69-driver-interrupt-based-wait-for-packetsent/
Power consumption to color indicator
Added a power consumption to color indicator as a long distance visual reminder to reduce power usage. Quite effective by the way π
2014 wireless power consumption monitor project
Updated a 2014 wireless power consumption monitor project of mine to be compatible with my latest generation project hardware and backend #homeautomation #IoT #esp32
DIY swimming pool solar heater
A DIY solar heater for our 13mΒ³ Bestway pool out of 16mm LDPE pipe β getting the water past the 25Β°C mark more days of the year.
Upgrading my fan coil thermostats
Upgrading the dumb fan coil thermostats on our DIY heat pump system β heat/cool, target temperature and fan speed, now connected.
Tweeting my house’s power usage as sparkblocks
Tweeting my house’s power usage as sparkblocks β unicode sparklines squeeze a full day’s trend into a single tweet.
Home voltage analysis
405835 AC mains voltage measurements later β analyzing six months of logging the unusually high voltage at my house.
Hot water tank controller project – part 2
Hot water tank controller part 2: code finalized, a week of runtime, and a small HTML page driving it through an emoncms.org feed.
Smart IoT solar hot water tank controller
A smart IoT controller for my solar hot water tank β mode switching (manual/auto/anti-freeze) driven by an emonCMS feed.
Yet another power monitor
Yet another power monitor β this one runs off a small dual-winding transformer that both powers the circuit and senses voltage.
Analysis of electricity usage per year
Comparing this year’s electricity usage against last year’s β checking whether all my energy use optimizations actually show in the kWh.
Domestic hot water for free
Domestic hot water nearly for free β my hacked Daikin air-to-water heat pump captures heat in both heating and cooling modes.
Every ΞΌA counts
Every ΞΌA counts on battery powered wireless nodes β the hardware and software tricks I use to keep sleep current microscopic.
High AC mains voltage
My house sits second to the transformer and the multimeter agrees with the cheap one: AC mains voltage is high. Time to log it properly.
Cheap DIY power monitor
A cheap DIY power monitor for my father β SCT-013-000 current transformer plus OpenEnergyMonitor resources, momentary and accumulated kWh.
nRF24L01+ power consumption footprint
Scoping the nRF24L01+ during transmissions to measure the real power footprint of my dirt cheap low power wireless sensor node.
Power saving techniques on the Atmega32u4
Power saving techniques on the ATmega32U4 β getting the Funky 2 close to the ATtiny84’s sleep currents for long battery life.
Hot water usage analysis
Analyzing our hot water usage patterns from heat pump telemetry β no flow meter, just data I was already logging to emonCMS.
emonGLCD
Building and evaluating the emonGLCD that Glyn from OpenEnergyMonitor kindly sent over β working within the hour.
My Raspberry Pi knows where I am..
My Raspberry Pi knows where I am β phone location feeding home automation ideas like easing the heating when I’m far from home.
Ultra low power sources for wireless nodes
Researching ultra low power sources for the Funky β including harvesting from a CT clamped around a live power line.
Low power receiver options
Low power receiver options for the RFM12B β how a battery node can listen for commands without keeping the radio always on.
E-meter PCB ready
The e-meter PCB arrived and is coming together β a wrong 2×8 header footprint and two missing parts, otherwise looking good.
Using Funky’s boost regulator get steady 3.33V from higher voltage
Using the Funky’s LTC3525 boost regulator backwards β a steady 3.33V from higher, sagging input voltages.
Solar statistics
Statistics from my 440 Euro 220l evacuated tube solar water heater β what the self-installed rooftop system actually delivers.
Power supply block with ADCs for power monitoring
What does a DIY power monitoring system really cost, and how accurate is it? A power supply block with ADCs, inspired by Dave Berkeley.
TinySensor’s SD card power consumption worries (and solution)
The SD card was ruining TinySensor’s coin cell battery budget β measuring the sleep current problem and the fix.