OpenNMC is an open replacement for expensive APC management cards

This article reviews the OpenNMC from NetCube Systems Austria, an open-source alternative to APC's proprietary Network Management Cards (NMC). The author, a homelab enthusiast, highlights the high cost of APC's NMC 3 ($500) and the locked-down firmware of previous cards. OpenNMC offers fully open-source firmware, a built-in NUT server, Ethernet, Wi-Fi, Bluetooth, and hot-swappable installation. The article covers installation, initial setup via USB-C serial, and the web UI for monitoring and testing. It also notes that hardware schematics are planned for release. The author tested a prototype sent by the company and marked the video as sponsored, but the article itself is an independent review.