Stair Design

The rise and run of a stairway makes it comfortable (or not). This reference is good but in imperial, this is good too but for the UK. Australian NCC requirements must be checked. Note NCC is about limits, not comfort. Running the […]

A39 House – Performance and Monitoring

Air Sealing Testing Introduction and Rationale “Build tight and ventilate right” is the mantra for passive houses in cold climates, such as “Passivhaus”. The idea is to heavily reduce air entering the building through cracks, windows and the like. This reduces the […]

A39 House – Construction

Tips: Concreting the Stumps Boral truck was very late, then charged a wait fee (!). Won’t use Boral again. Pumping (minipump) was well worth it. $500 with 2 guys did 8 cubes ( 8 x 16 large barrows). Pretty straight forward. 4 […]

A39 House – Design

Daylight Modelling to Inform the Design Target A DF of 10% will always stop people turning on lights A DF of 3% is deemed “adequate” Target: 5% to most of the floor. But: minimise glare, moderate window sizes Method Ecotect and Radiance […]

A39 House – Completion

Guest Feedback My husband and I and two daughters had a wonderful stay in Herston. The house itself is amazing – carefully designed with incredibly ingenious features to make it compact yet spacious. It is a really interesting and informative place to […]

Hacking the Sungrow 5 Inverter

This inverter has a WiFi connection and opens ports 80 (password protected) and 502 (modbus). It’s possible to read the modbus registers. There’s a handy script that’s done all the hard work. This can import into Influx, as shown below (via grafana. […]

Access Grafana v5 via token without login screen

This works for Grafana v5. Grafana v6 has removed this functionality for security reasons. This explains how I implemented a previously outlined solution, in a step-by-step fashion. I initially struggled to get this running.   There’s the method that worked. Overview The goal […]

Investigating for IotaWatt, AWS, InfluxDB and Grafana

I’ve previously used EmonCMS to log power and energy data from a IotaWatt  / EmonTx system. This works well, but I’ve been looking for a flexible and fast alternative. The combination of IotaWatt, InfluxDB and Grafana look to provide this. My experiences […]

A39 House – Overview

I’ve recently finished a self-build of a small (90m²) house in Brisbane. It’s been “running” for 2 years now. It’s in Brisbane. TL:DR > See the article in Santuary Magazine (PDF) … or view the time lapse of construction… or there’s a photo […]

Sizing a Battery and Solar System with Phisaver Data

This follows how I sized a solar and battery system for my house, using energy monitoring data from phisaver. An example of the data is below: Sizing the System Firstly I checked the daily consumption, and night-time consumption: Daily average of 13.5kWh/day. […]