Small-batch Home Assistant hardware, designed and built in Ireland. SolBus makes interface boards that bring heating and solar controllers into Home Assistant via ESPHome — starting with Resol VBus (DeltaSol and its rebadges: Viessmann, COSMO, Caleffi, Sonnenkraft, Firebird and more). It began as a board I built to get my own solar system into Home Assistant. • Honest about compatibility — message me with your controller model before ordering and I'll tell you straight whether it's supported. • Built on open source — with full credit to the original open-hardware projects. • Tested before shipping, posted from Ireland via An Post. https://lectronz.com/stores/solbus Custom RSS Generator https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NzY1OTgsInB1ciI6ImJsb2JfaWQifX0=--7f87efc777d762998caeb42bccb172381e2b4574/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJwbmciLCJyZXNpemVfdG9fbGltaXQiOlsxOTIsMTkyXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--0808b744be7c555ce58430d0ed7115f4f35a0403/user.png https://lectronz.com/stores/solbus All-in-one Resol VBus to WiFi board — reads your DeltaSol solar controller into Home Assistant via ESPHome. On-board ESP32-C3, USB-C. Wed, 11 Nov 2026 13:01:10 +0000 https://lectronz.com/products/solbus-ahaon-resol-vbus-wifi-board https://lectronz.com/products/2476