Installing a generator solo for the first time

[Doctor Electric]

I am getting ready to go look at a job involving cutting in a transfer switch and laying a generator for whole house operation I have done this many times for my company that I work for however I've never dealt with pricing and profit on one of these bad boys is there any tips or tricks to bidding one of these jobs that involves me making the cash I should but not ripping the customer off and losing the job and future business. Do I charge my normal rate or a higher rate because it would be considered service work???
Any thoughts on this would be appreciated thanks guys