The power of the two batteries is: 12*200*2=4800W. In order not to damage the battery, it is best to reserve 20% of the power and not use it up. The conversion rate of the inverter is generally 90%. After two 200AH batteries are fully charged, the power that can be output is: 4800*80%*90%=3456W. It can drive a 100W load for 34 hours, a 200W load for 17 hours, or a 1000W load for 3.4 hours. (3456 divided by the load power equals the usage time)
The power generation of a wind turbine is a bit difficult to calculate. At rated wind speed, it can generate 500W of electricity in one hour. If the solar panel is 500W, it can generate 2000W to 2500W of electricity per day when there is sufficient sunlight (it cannot generate much electricity even if there is sunlight in the morning and evening, and is generally calculated as 4-5 hours per day). If it is cloudy, very little power will be generated.
Whether you need a transformer or not depends on your practical needs. For example, if the electricity generated by your wind turbine is 12V, and you want to use 220 electrical appliances, then you will need a Transformer to boost the voltage to meet your requirements. If you still need help, please ask me again.