Check the listing for details. Driver Board 9/10 For Low Frequency Split Phase Pure Sine Wave Power Inverter. Condition: New. Listed at 49.91 USD. This is Driver Board For Power Jack【3KW/5KW/6KW/8KW/9KW/10KW/15KW/20KW】Version 9/10 Split Phase / Single Phase Low Frequency Pure Sine Wave Power Inverter It just suitable for Power Jack Brand Version 9/10 Split phase & Singel Phase Series,pls kindly check the version of your orginal board then purchase it is better you take clear photos to show us then we'll help you to check it. When Driver Board bad,there are maybe other parts bad also,it is better you contact with us to confirm the problem first. The Driver Board just new,we can not make sure after you replace,your problem can be resloved or not,if it can not reslove the problem after just replace the only Driver Board,then this is not covered by the warranty,pls note you can accept then place the order,thanks. the whole control board set, has 7 pcs on it, each small piece has LED light, LED light will not on when the borad is faulty, just replace the small board, then inverter will back to work.the control board set including 7 pcs small board:1. AC charge board2. CPU board3. IC board4. power source board5. signal board6. overload protection board7. driver board