The tee-inverter WVC-2000 family (WVC-1600, WVC-2400, WVC-2800) is very nice and low price, available in two version: with sub-1GHz transceiver (needs a DTU to manage that protocol and convert to WiFi) and WiFi, connecting to the "Cloud Intelligence" sensor network.
Anyway, we strongly suggest to skip this product because:
- it's not safe: disconnecting it from the grid (power outage or turning OFF the RCBO), the produced voltage jump to 285V then falls, in 30 seconds, down to 248V and remains at 248V until Sunset! This is not safe, the inverter must check for 230V and stop producing in case of power outage to avoid electric shocks.
- very low efficiency inverter: as the inverter sends DC power and AC power telemetries to the Cloud Intelligence, it's easier to compute AC power by DC power ratio, and it's lower than 0.92 (8% loss). Infact, with only 600W output power and 30°C enviroment temperature, the inverter temperature goes to 58°C and this is not good
- very poor MPPT algorithm: comparing the AC power produced by 830Wp panels using this inverter, and another photovoltaic system using SolarEdge inverter, the overall efficiency of this inverter is 0.815 respect to the SolarEdge one.
- high leakage current: it's mandatory to connect the inverter chassis to the Protection Earth due to the leakage current produced, most probably, by the high capacitors connected to the ground in the EMI filter.