Category Archives: Reviews

Double Conversion UPS, Part I

Most people are familiar with the idea of an Uninterruptible Power Supply (UPS), such as used to help keep a computer running throughout power outages. Intended for only seconds to minutes of use, long enough to get past a short power glitch, or to give the user time to save files and shut down before […]

Testing Emergency Solar Christmas Lights

In a previous article, we described the adaptation of LED Christmas lights as emergency solar lighting powered directly from an off-grid battery array. This approach provides many advantages versus running them from an inverter, including useful lighting while trying to fix your inverter. In that article we made some recommendations about string lengths, current and […]

Product Review, Bestek 300W Pure Sine 12V Inverter

As part of our off-grid solar series, we’re looking for bare-bones options for the charger and inverter components to meet the minimum requirements of driving a 70 watt freezer, 24/7 if possible. We recently tested a Bestek 300W Pure Sine 12V Inverter, shown to the right. Although this unit failed to drive the freezer, it […]