Tag: Power Monitoring

7 August 2023

Home EV Wallcharger Setup & Installation Tips

Having had electric vehicles for a few years now, I thought I’d share a few tips and photos regarding our current EV charging setup. We currently have 2 EVs (both that live outside) and 2 charging points, one beside the other.

Categories Electric Vehicles/Home Automation/Security Comments: 0

6 August 2023

Appliance Completion Notification with Node Red

Use of Node Red and Javascript to monitor power to an appliance and notify when complete. It also can log to a csv file and do calculations based on total power used and the cost of that power, with peak/offpeak rates taken into account.

Categories Home Automation Comments: 0

24 December 2022

Oven Reminders with Node Red & ESPHome

Use of Node Red and Javascript to monitor power to my oven and give regular announcements that is is still running. It also can log to a csv file and do calculations based on total power used and the cost of that power, with peak/offpeak rates taken into account.

Categories Home Automation Comments: 0

27 June 2022

Used EV Payback (Part 2, Was it worth it?)

How much to you save buying a used EV, and is it worth it? How long is the payback? This is my actual calculations about four years later and close to 100kkms on the odometer of the 2014 Nissan Leaf I purchased. Cutting to the chase, it was a LOT better than my estimates, and I wish we’d bought two of them.

Categories Electric Vehicles/Home Automation/Opinion Comment: 1

27 May 2021

Kogan Smart Plug: No Esp8266? (Tuya WB2S)

It is getting more and more common to get smart devices that have chips other than ESP8266 in them, and these chips are usually not flashable with the likes of Tasmota, espHome etc. This Kogan power monitor had an Tuya WB3S

Categories Electronics/Home Automation Comments: 2

12 May 2021

Kogan Smart Plug and Tuya Local Notes

It is better to replace the hardware and run all devices locally, which is what I did, However, before I did that, I wanted to see what was involved in running tuya local in home assistant. I have not given much detail here, but my YAML setup is below for reference.

Categories Electronics/Home Automation Comments: 0

29 July 2020

Tasmota Energy Meter Pulse Output Counting

Summary This monitoring was built as part of my whole house 3 phase monitoring project. I had a couple of kWh counters (often called Check Meters) on my main and a sub board. Not as accurate, and can’t monitor V or power factor etc, but useful to look at targeted areas of power use as well as having their own...

Categories Home Automation

26 July 2020

Whole House Surge Suppression for 3 Phase

Summary Common in Europe and other locations around the world, but not really in NZ is the use of surge suppression modules in a main DB. I have a few servers and sensitive equipment so thought it might be a good idea as I was building a small power monitoring switchboard anyway. Standard install practice is to use an MCB...

Categories Home Automation

21 July 2020

Whole House 3 Phase Power with PZEM-004T

A robust, accurate, low cost and safe whole house electricity monitoring setup, using PZEM-004T modules. These use current transformers (CTs), and send data as TTL Modbus-RTU. Recently Tasmota has added support for up to 3 of these directly (on the same data channel) so there are fewer hoops to jump though to get them working (previously my testing involved sending serial commands)

Categories Home Automation