A new customer wants to pay with ACH and asked for our bank instructions. We have "Bank Transfer" set up in our invoices. Is this the same thing as the ACH request?

You're correct, mhawley2069.

The Bank Transfer option is the same as ACH (Automated Clearing House). From there, the funds will be debited from their bank account and will be credited to your bank. 

They can choose it and enter their bank details, then click on Pay button.

You'll want to check this article to find out when QuickBooks Payments deposits customer payments.

Please post again if you need more help with this. Have a great day!