Suntwins 4000TL 2 MPPTs inverter 1.SAA, CE Cerified 2. pure sine ... . Transformerless 4. IP65,high efficient MPPT Grid-tied solar inverter Suntwins- 4000TL BENEFITS1. 2 MPPT channels, new generation technology 2. Two high ... grid voltage range and frequency range depend on local standards. Suntwins 4000TL 2MPPTs Solar Grid-tied Inverter