Solar Panels vs a Heat Pump: Which Should You Buy First?

Solar panels and heat pumps often get compared as if you must choose one. In reality they do different jobs, and for many homes the smartest move is to understand how they fit together. One changes where your energy comes from; the other changes how much you need. Here’s how to decide which to tackle first.

What each one actually does

Solar panels generate electricity, lowering what you buy from the grid. They don’t change how much energy your home consumes; they change its source and price.
A heat pump heats (and often cools) your home using far less energy than traditional electric or fuel heating. It’s an efficiency upgrade that shrinks one of your biggest energy uses.

The core difference: Solar makes your power cheaper. A heat pump makes your heating need less power. That's why they complement each other rather than compete.

Why they work so well together

Heating and cooling are usually the largest chunk of a home’s energy use. A heat pump slashes that demand, and solar can then supply much of the electricity the heat pump runs on. Cut your usage first, and the solar system you need can be smaller and cheaper. Add solar, and the heat pump’s running cost drops further. The pairing is genuinely more than the sum of its parts.

Which should you buy first?

There’s no single right answer, but these guidelines help:

Consider the heat pump first if:

You currently heat with expensive electric resistance heating or costly fuel. The efficiency gain is immediate and large.
Your heating system is old and due for replacement anyway.
Your electricity bill is dominated by heating or cooling.

Cutting demand first means any future solar system can be sized smaller.

Consider solar first if:

Your heating is already efficient, or you use little of it.
You have high overall electricity use across many appliances, not just heating.
Local incentives or net metering for solar are especially strong right now.

The efficiency-first principle

There’s an old energy rule worth remembering: reduce before you produce. It’s usually cheaper to stop wasting energy than to build capacity to generate it. A heat pump is one of the biggest single efficiency upgrades available, which is why it often makes sense to shrink your demand before, or alongside, sizing solar. For lower-cost efficiency moves to do first, see cutting your bill without solar.

A quick comparison

Factor	Solar panels	Heat pump
Main job	Generate cheaper electricity	Heat and cool efficiently
Effect on bill	Lowers power price/source	Lowers heating energy used
Best when	High overall electricity use	Costly or inefficient heating
Works with the other?	Yes, powers the heat pump	Yes, reduces solar size needed

The combined path

If budget allows, many homes do best with both: a heat pump to cut demand and solar to supply cheap power for it. If you can only do one now, pick the one that attacks your biggest cost. Just avoid oversizing solar before a heat pump, since the heat pump may change your usage enough to alter the ideal system size.

Try it: Once you know your electricity use, our Solar Cost Calculator estimates the system size, cost, and payback, so you can weigh solar against, or alongside, a heat pump.

Bottom line

Solar and a heat pump aren’t rivals; they solve different halves of the same problem. A heat pump cuts how much energy you need, and solar makes the energy you do use cheaper. Attack your biggest cost first, size solar after you know your real demand, and pair them where budget allows. To ground the solar side in numbers, read how much solar panels save.

Savings depend on your climate, current heating type, and local energy prices. Confirm figures with local professionals before deciding.