Old School Tech has released a product review for the Bestek 300 watt pure sine wave 12 volt inverter. Pros: this fairly rugged unit, for the price, produces a nice sine wave, albeit at a marginal no-load 109 volts, and is acceptable for small inductive loads or any small load over lengths of extension cords. […]
Old School Tech has released an article about extracting raw potash from wood ashes. Future projects will refine and use this raw product for interesting things. Not only does this project make a great homeschool chemistry lesson, it also sets the stage for some chemical processes of interest to self-sufficiency enthusiasts. As mentioned in that […]
Old School Tech has posted an article about converting Christmas LED light strings into emergency DC lighting for use directly from an off-grid battery array, no inverter required. This kind of lighting is great for safety-critical areas and allows a reliable backup source of lighting when other sources fail. Annoying AC flicker is also eliminated. […]
Old School Tech has posted a new article about a little scare we had with our freezer this morning. Although it turned out that this was just a simple thermodynamic misunderstanding, it does help highlight some of the issues involved with debugging appliances.
Old School Tech has released a new article, this time on solar wiring, connectors and tools. Although this is the final article in the hurricane ground solar series, it isn’t our last article on solar. This past week, we interviewed a system designer at Iron Edison about their nickel iron and lithium iron phosphate batteries; […]
Old School Tech has released a new article in its ground solar series, this time about the batteries. Originally intended to only run a freezer, we were able to also run two refrigerators off this system, but only for about four hours per night. One of the missions of the nightwatch during the hurricane power […]
Old School Tech has released a new article about the ground solar array we deployed during Hurricane Matthew. This time, it is about the inverter, or in this case, the 24 volt MicroSolar 1000 watt pure sine inverter. As you will read in that article, we had to derate it by about 3x, which is […]
OST has posted a new article introducing the book Caveman Chemistry, by Dr. Kevin Dunn. “Starving the Monkeys” readers will recognize this book from our recommended reading list; we use it all the time for our homeschool chemistry lab manual to supplement text books. If you only have room on your self-sufficiency shelf for one […]
Old School Tech has just published a new article in the ground solar series, this time on the selection and use of a charger. As with the previous ground solar article, this one is all technical; not much to add from a political or self-sufficiency point of view.
Old School Tech has a new article on solar, this time a very detailed article about combiners and their essential role in an off-grid system. This one is pretty much all technical; not much to add from a political or self-sufficiency point of view.