Will I be to enable batch payment and create ABA file in QBO Essentials and connect Bank that is not on QBO preset list ?

Good question, evelina2.

For banks that are not on the QuickBooks Online (QBO) list, you may want to request a support for you bank before you enable batch payment and create an ABA file.

I'll show you the steps on how to request support for your bank:

1. Go to the Banking menu.
2. Select Add account.
3. Search for the name of your financial institution. If QuickBooks is unable to find your bank, you will get the message, "Hmm, we can’t find [name of the bank you entered] in our list of supported banks," and you will be presented with helpful tips to try and locate your bank account.
4. If you’re still unable to find your bank, select Request support for your bank.
5. Enter your bank's web address (URL) in the field provided, then select Request.

Once the request is approve and you've already set up your bank, you can start activating batch payment for your bank.

Here's how:

1. Go to the Gear icon and select Chart of Accounts.
2. Find your bank account.
3. In the Action column drop-down, select Edit.
4. Check the box I create batch payments for this account.
5. Fill in the relevant information for your bank, and then Save and Close.

The you can enable batch payment for your supplier by following the steps below:

1. From the left menu, select Expenses, then Suppliers.
2. Select the supplier that you want to create the batch payments for.
3. Select Edit.
4. Check the box I create batch payments to pay this supplier.
5. Fill in the supplier’s banking details, then Save.

Finally, you can now create a batch payment file. This will create a batch payment file (.ABA). Let me guide you through the steps on how to do it:

1. Click the + New and select Pay Bills.
2. In the Payment account field, select the account you want to make a batch payment for.
3. Check the box of the bill/s you want to pay.
4. Select the Save drop-down, then Create batch payment.

All these and more information about creating ABA file in QBO are outlined in the following articles: 

• How to enable batch payments or create ABA Files.
• Saving You Time with ABA Files (an Electronic Payment File).

Feel free to comment below if you have further questions. I would appreciate the opportunity to help you with your concerns.