Defective product, awful support
I bought a TSUN microinverter on May 12th — it never worked. I tested the same solar panels with an RC microinverter (MC MI2S-800D) and it worked perfectly, clearly proving the TSUN unit is faulty. Still, TSUN refuses to replace it. Their after-sales team, namely the Head of After Sales Support, keeps asking for photos, videos, and technical measurements — things an average customer without electricity knowledge and equipment can provide. It was supposed to be a "Plug and Play" solution but at the end of the day, it is being more of a Plug and Pain with no solution yet. They're just stalling and avoiding responsibility. Terrible experience. Avoid this brand. UPDATE (June 12th): Tsun (the same After Sales Support team that replied to this review, namely the head of this team) has finally approved the replacement of the product after 1 month. I had to send the product to Spain so that they could reach the conclusion that the product wasn't functioning at all. The new product seems to be working fine. No apologies received so far.