Low-cost DIY DC UPS system using 18650 batteries and ESP8266. Features real-time monitoring via Tasmota and Home Assistant integration (MQTT) for routers, mini-PCs, and smart home devices
mqtt battery electronics smart-home ups diy home-assistant 18650 tasmota diy-electronics 18650-battery diy-ups tapo-c210
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Updated
Dec 25, 2025