Taking a chance on Alibaba for my solar panel setup, I wasn't sure what to expect. But let me tell you, Penny Pan at Shenzhen First Tech was a game-changer! Unlike other sellers who just push products, Penny took the time to understand my entire system (panels, inverter, string setup) before recommending the perfect PV optimizers.
The optimizers themselves are fantastic - well-made and surprisingly easy to install, even for a DIYer like me. The only hitch? They don't track individual panel performance. But for the price, that's a minor quibble.
Speaking of fantastic, Shenzhen First Tech's customer service is top-notch. When I had an issue with 3 optimizers, they were incredibly helpful and replaced them without any fuss. Overall, this Alibaba adventure turned into a stellar experience thanks to Penny Pan's expertise and Shenzhen First Tech's smooth service. Highly recommend!