Energy consumption and photovoltaics: from the perspective of a homeowner

Following recent developments in the pricing of electricity for households with solar panels in the Netherlands, I got interested in the energy balance of our own household. A little over two years ago, we moved into a newly build house that qualifies as a "zero-on-the-meter house". This qualification implies that -- under certain assumptions -- the house has a net energy balance of zero or below zero, i.e....

Reading data from a Solax inverter

As part of a larger effort to get a better understanding of our energy consumption and production, I wanted to log the power generated by the photovoltaic installation in our house. We use a Solax system consisting of 8 solar panels, a Solax X1 inverter and the Solax Pocket Wifi 2.0 device. Via this manual I will explain how I got the data extracted. In the rest of...

Getting weather forecast data from the Royal Meteorological

As part of a larger effort to get a better understanding of our energy consumption and production, I wanted to predict the production of our solar arrays on a day to day basis. This requires information on the Global Horizontal Irradiance, which is calculated in the weather models by the Royal Netherlands Meteorological Institute KNMI. Because the KNMI is a publicly funded organisation and is part of the...

Parsing information from a Dutch Smart Meter

In the Netherlands and increasing number of homes have a smart energy meter, that communicates with the energy supplier and automatically provides them with numbers of the usage. In earlier times, you had to read of the reader yourself, fill in a registration form and mail it in to the energy supplier. The newer meters have an accessory port that can be used by the home owner, to...

Nonnevotten – Recipes compared

Last year I wrote a blog post on the twisted treat that my family makes every years for new years eve: Nonnevotten. I tried to standardize the recipe to measures of weight instead of volume and to standardize the process of making them to get more reliable results. If I want to improve on the recipe, I need to experiment a bit with the recipe to see if...

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