This 3.6kva sms comes with inbuilt 120A mppt charge controller, it has the ability to work with our without batteries. We also have the 1kva 12v 40A mppt, 1.5kva 40A mppt, 2kva 12v with 80A mppt, 4.2kva 120A mppt, 6.2kva 120A mppt, 10kva 120A all available