[RWebb]

I'm sure this is a simple and obvious question to those who know how to set up a NPV question on a calculator (or something like that), but...

my electrical utility will subsidize me if I install a ductless heat pump

I can choose either [a] loan at 0% of $4,500, or [b] a rebate of $750

Which is better for me to do?

If it matters, the cost will be about $9,500 to $10,000 I think, and I would likely get a loan at ~~6.7% (variable rate, and likely to increase over the next few years) for the remainder of the cost.

I could cash in stock or mutual funds to pay for the whole sheebang, but am reluctant to do that when I can let those monies sit and grow (at an expected rate > 7%).