In this case you should investigate Chinese battery elements and customes taxes in your country cause yesterday I discovered Poland  doesn't allow parcels more than 150 euro if you get it through "Meest China post"

The quote we got with batteries was about 4x higher than just installing solar panels.

They’re are definitely cheaper in China, but it’s difficult trusting the quality. I’m ok to wait longer for better batteries at a lower cost.

bitcoin

Got Solar? How Much & What For?

Batteries becomes cheaper too. Have you considered to aquire it in China?