Solar loan on house

Hi everyone,

We are currently looking at putting an offer on the perfect house to us.

Problem that arose is that they recently put a solar system with battery bank. Total loan is $58k, seller is willing to pay 30k off.

We plan to be in this house at least 15 years, until the youngest graduates. Possibly longer depending on grandma's health.

I know most advice is to have them pay in full, but are we wrong for entertaining the idea of taking the $28k? We are told it can be assumed @2.9%

We are tempted as the house seems to be about 60k less than the comps in the area.

Thoughts?experience with solar?

Enphase solar system

Tldr: 58k solar loan, seller willing to pay 30k. 28k Assumable @ 2.99, not sure the term yet.