You follow the textbooks with short description and the list of question which probably asked in examination..Refer such types of books.Then if you find some practice exam test join that and give test continuously..From these test you can get idea where your efforts become less..hope this will...
It all depend on how you work..and also check the rates of local competitors so you can decide your price..Firstly try to gain trust of people by good work, Once you are popular you can decide the new rate as per your living charges
For passing this exam you have make estimate of changes for clearing exam
There was 3 types of answers that I was giving on the exam, I figured I could calculate my score by assigning a % to each answer:
The problems I’d looked up or worked through and was certain that I’d done correctly: 90%...
For this you can take help of solarenergy.org simply google it..They offered all the courses and certification related to solar energy..Hope this will helps you..All the best!!