When should I pay for a deposit? And what % of the quote is usually taken for the deposit?

When should I pay for a deposit? And what % of the quote is usually taken for the deposit?

For small jobs the deposit should be a maximum of 10% in all states except WA where it should be 6.5% and in Tasmania where no deposit is required.
For ‘large jobs’ in QLD, VIC and SA should be 5%. 
- In Victoria, you should not pay a deposit to a solar provider until your eligibility has been confirmed by Solar Victoria
- Generally, you should pay the deposit after agreeing on the terms and conditions in the contract and checking they have a clean energy council accreditation.