Michael K Johnson<p><span class="h-card" translate="no"><a href="https://fosstodon.org/@FreeCAD" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>FreeCAD</span></a></span> Finally printing at least the first iteration of my solar charge control and battery power distribution box for <a href="https://social.makerforums.info/tags/HamRadio" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>HamRadio</span></a> POTA that I shared early versions of last week and have been tweaking in FreeCAD on and off in the meantime.</p><ul><li>Two battery busses, each with both an XT60M and PowerPole connection. Each bus is intended for only one battery, though.</li><li>One XT60M connector for a solar panel connected to a charger, which can be connected to either battery bus or disconnected. The solar charger has a USB-A output as well. A relay (internal, not visible in this model) protects the solar charger from being connected to the solar panel unless it is connected to one of the battery busses.</li><li>Two device buses, each with three fuses protecting five device power ports, for a total of eight XT60F and two PowerPole connections.</li><li>One 65W USB-C PD converter with a USB-A socket that can charge a laptop.</li><li>Each device bus and the USB-C converter can be independently switched between the two battery busses or disconnected entirely.</li><li>Not part of this box, but the solar panel also has USB-A and USB-C power supplies built in.</li></ul><p>The design was exploratory and is not the cleanest or more parsimonious or highest-performing modeling, but such as it is, it is available at <a href="https://gitlab.com/mcdanlj/SolarPowerBox" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">gitlab.com/mcdanlj/SolarPowerB</span><span class="invisible">ox</span></a></p><p>I can't imagine anyone else wants to make this, and the planned schematic is not drawn let alone shared, but some of the parts might be useful. I did make them in a dev build of FreeCAD, so they are untested in the stable 1.0.1 release.</p>