Hardware

Building an off-grid 10kW solar system with 28kWh LiFePO4 battery, inverter, BMS and charge controllers for under €10K

Tags: Electronics, Finland, Hardware, Solar

Over the past decade or so I've been working on off-grid solar installations big enough to power a house, even during the long, cold (and dark) winter months here in Finland. While November, December and January remain challenging, it can actually be done - and pretty well. The issue in the past has been that doing this was quite expensive. The first implementations I built for this ran in the multiple tens of thousands of Euro and required quite some attention to keep going. These first systems relied on expensive components and difficult to manage and heavy lead-acid batteries. Over the past few years however, the landscape has changed and there are possibilities that I could only dream of even as little as a year ago. The post below details the components, where to get them, requirements, and the cost to get an off-grid solar system with several days of autonomy running for under 10K Euro. 

Solar Power

How Small?

Tags: Electronics, Embedded, GPS, Hardware

As some of you may know, we at WRD Systems have been working on our new, next gen, GPS tracker. The goal of this one is to be as small as possible, yet pack as many features as possible out of the box while keeping the cost low. We often get requests asking how small our tracker is. We tried communicating scale in millimeter, or took a picture of the board next to a coin, but they did not seem to convey how small our tracker can really be. To try to improve on this, we present the Matchbox Tracker:

GPS Tracker - Update

Tags: GPS, Hardware, Tracker

The GPS Tracker is progressing nicely. The picture below shows the populated PCB of the base station. The software is running on Genesi's Netbook prototype (http://www.genesi-usa.com/)

 

 

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