16°C outside temperature right now
16°C outside temperature
3.7V Li-ion 14650 1100-1500mAh with welding pads
Does anyone know where can one buy a battery like this in the EU? It is a 3.7V Li-ion 14650 1100-1500mAh with welding pads.
Rooftop PV installation
New blog post: Rooftop PV installation https://harizanov.com/2023/01/rooftop-pv-installation/ #solar #DIY
Rooftop PV installation
Why rooftop solar is a hard sell in Bulgaria and how I did it anyway – the full story of my PV installation, from permits to first kWh.
55kWh Tesla Model 3 battery with Fronius GEN24 solar
Dala's EV Repair managed to configure and use a 55kWh Tesla Model 3 battery with @froniussolar GEN24 #solar inverter. That opens new options for EV battery repurposing after their useful life. https://www.youtube.com/watch?v=-s7lODLDOiQ&ab_channel=Dala%27sEVRepair
Washing machine over the air firmware update
Wife is complaining that the washing machine is performing an over the air firmware update, and cannot be used the next few minutes. She is not impressed. We live in interesting times.. #IoT
A fire-starter, extracted from a UPS
A fire-starter, extracted from a UPS
Solar production at winter solstice exceeds my expectations
#Solar production at winter solstice exceeds my expectations, a whopping 19.5kWh given it was hazy 10-11am. This is out of a 6.4kWp PV installation in Sofia, Bulgaria.
New all electric Renault Megane e-tech
Test drove the new all electric Renault Megane e-tech today. I like it better than the VW ID3. Overall an impressive EV, but needs some “getting used to”.
Solar production dropped to zero
This guy showed up, and solar production dropped to zero last couple days. My panels aren’t easily accessible (rooftop) so that I could remove the snow. Enjoying the winter anyway, forecast is that snow will melt in a day or two.
Work smart AND hard
Work smart AND hard
The solar cell is effectively a diode
The solar cell is effectively a diode, running current through it causes it to heat. Wondering why isn't this effect used by inverters to de-snow panels in the winter? #solar
Node-Red dashboard to control the BYD PV storage battery
Node-Red dashboard to control the BYD PV storage battery behavior over Modbus TCP. Storm is coming and power failure is likely? No problem, force-charge the battery, including from grid, and put it on hold for emergency power backup purposes. Neat 🙂
Location tracking and precise location
I didn’t realize location tracking and precise location were enabled by default in Twitter app, turning both off and feeling bad about this privacy invasion going on unnoticed for so long by me
BYD battery automatic switchover box
Now that the BYD battery is here, I finished the automatic switchover box. It physically disconnects the house from the grid and instructs the inverter to start in island mode. Upon grid availability again, the inverter monitors its stability and switches back to grid-tie mode. First time building such a distribution box, I realize the…
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.
Excel calculation around the guaranteed 23.1 MWh throughput
@MZapryanov Made this Excel calculation around the guaranteed 23.1 MWh throughput vs different DoDs, it seems the golden spot is between 60-80% for the desired longevity, without exceeding reasonable lifetime expectations. I hold no hope the battery will last 16 years 🙂 (2/2) @MZapryanov A good takeaway from the diagram you posted is that the…
Depth of Discharge for my PV system’s BYD 7.7kW LFP battery
What is a reasonable Depth of Discharge % for my PV system’s BYD 7.7kW LFP battery,so to maximize its longevity? Should I keep SoC between 20%-80% e.g. 60% DoD?The inverter default battery SoC limit configuration is 5%-100%, but 95% DoD feels like it would be bad for the battery
BYD_BatteryBox HVS 7.7kW battery for my solar system
The @BYD_BatteryBox HVS 7.7kW battery for my solar system arrived today, the order took five months. Installed it myself, that took less than two hours. Still need to put the cables into a channel. All worked right away, slightly surprised 🙂
Excellent PV production from my 6.4kWp installation
Excellent PV production from my 6.4kWp installation, almost 22kWh for the day, including the EV range to cover my commute. #solar is great
Ohmpilot in BOOST mode from the solarweb app
@froniussolar please consider to add the possibility to put the Ohmpilot in BOOST mode from the solarweb app, now this is only possible via triple press of the physical button. A proper IoT solution supposes full remote control from anywhere:) Thank you !
The @froniussolar Ohmpilot working hard
The @froniussolar Ohmpilot working hard to divert every excess PV watt to a hot water tank on an averagely overcast day (reddish color on the below chart), impressive piece of engineering.
Fronius Ohmpilot and PT1000 temp. sensor
Received a @froniussolar Ohmpilot today. It diverts the available PV excess to a hot water tank (or any resistive load), in my case 0-2400W stepless regulation. Installation was trivial. The package did not include a PT1000 temp. sensor,ordering one separately for more control
The 256th day of the year
It is the 256th ( 0x100th, or the 2^8th) day of the year 🙂
MQTT load balancing решение
Препоръчвам сесията на Роско Иванов относно #MQTT load balancing решение —> https://dev.bg/event/iot-mqtt-load-balancing-over-own-architecture/
Node-RED solar power forecast plus
Using Node-RED's node-red-contrib-solar-power-forecast-plus contribution to plot (light blue line) the estimated max PV generation in ideal conditions for my location/panel orientation/time of year; seems pretty accurate so far. Useful to know what theoretical maximum I have.
DC side surge protection device
Installed a DC side surge protection device to my @froniussolar GEN24 #solar inverter. It comes as retrofit option, installs in under 20 min. A lightning strike nearby can induce damaging voltages in the wires from the rooftop panels 30m away, this SPD takes care of such cases
July solar stats
July #solar stats: 69% of our consumption is self-generated. If we had the 7.7Kw BYD battery (on order) installed, that would have been an easy 100% self sufficiency.
The grim reality of buying anything PV related in 2022
The grim reality of buying anything PV related in 2022, see below the response to an inquiry about a order I made couple months ago. Other sites cite April 2023 for the same product, these guys preordered Nov 2021 and “are optimistic” to deliver this September.. crazy times
Solcast API and home energy usage planning
Fiddling with @solcastAPI; API supposedly provides estimated PV produce based on weather forecasting for a location. Will compare against reality and potentially use to optimize home energy usage planning
Charging an EV 100% on solar PV surplus
Charging an #EV 100% on #solar PV surplus, feels oddly satisfying. @froniussolar
Fronius WattPilot EV charger
The @froniussolar WattPilot EV charger just arrived. This is the 22kW model, we have single phase installation, so max 7.4KW would be available. Can be configured to only charge using PV surplus, and supposedly works with zero feed-in. I don’t own an EV yet,will rent one to test.