This site relates my experience with WVC-600 grid tie solar micro inverters, after one year of use. You probably will have the same problems with other models as they use the same technology: WVC-300, WVC-1200, WVC-700, WVC-1400…
1- Unreliable and dangerous
Two WVC-600 inverters stopped working after only one day of use, one of which burnt.
2- No warranty
The seller refused a return to repair/exchange, arguing that they only sell brand new WVC-600 inverters.
3- Poor efficiency
With twelve 300W solar panels, a total of 3600 Watt, I only managed to get 3000 Watt at most, which is an efficiency of about 83%. Now, after one year, it’s down to 2600W.
4- MPPT is defective
With 6 micro inverters connected, the MPPT never lock. The system sometimes stays blocked at a very low production (200w instead of 3000) until the main AC is turned off and back on.
5- WVC Inverters are not properly tuned
WVC-600 micro inverters are reporting eccentric values through the WVC modem: AC at 290V, or output power higher that input, etc…
6- The constructor doesn’t reply
After multiple requests to the constructor, Dongguan KaiDeng Energy Technology Co, asking for help (or at least schematics), I’ve never got a response.
I will detail in future articles every point listed here. Opinions are my own. You might be luckier than me with these Chinese micro inverters.