Useful battery powered PoE Gigabit adapter tested with ThermoView 30 and 40 plus SV600
These devices are marketed as mini UPS devices for routers or CCTV cameras.
There are 2 versions on the market with PoE voltage switching. Please only choose the 48V version and not the 24V version:
Search for Mini DC PoE UPS 48V
Link to Device on Amazon Shanqui Store
Also sold under the ILEPO brand.