Question : Problem: Making an Inverter

I need to make an inverter of 2500 watt or 5000 watt capacity for my project. After a lot of search, I was only able to make a working 500 watt inverter. Can someone tell me how to upgrade it to 2500 or 5000 watt? I am stuck at the moment. A circuit diagram would do. I would also appreciate it if it is 1000 watt or anything higher than 500. Maybe if I study and compare the that with the one I made, I'd get the logic and be able to do what I want. Thanks in advance.

Answer : Problem: Making an Inverter

Your best bet is a motor generator.
Africa can have shipping problems and fuel problems. Does your location have any problems?
There exists a rather small 7Kw pulley driven generator which has very flexible driving requirements.
Solar cells at your power level are out of most price ranges.
Small engines modified to run on vegetable oil are available if one is mechanically inclined.