Hello EdSanderson,

I can help you send batch invoices. Here's how:

1. Go to Sales.
2. In the Invoices tab, select the invoices.
3. Click on Batch actions.
4. Select Send transactions. 
5. Enter the customer email address.
6. Click on Send.

For now, sending multiple invoices to a class or batch of customers isn't available. I'll take note of it as a product suggestion, and I'll personally send it to our product developers. 

If you have any questions, please let us know. We'll be right here to help.