Capital Allocation: Solar vs. Heat Pump
These are two of the biggest home-energy purchases a homeowner can make, and they compete for the same limited budget. This compares them directly on their own respective economics.
At your inputs, the heat pump conversion costs $2,000 less over 10 years.
| Put the budget toward solar total cost over the horizon | $23,000 |
|---|---|
| Put the budget toward a heat pump conversion total cost over the horizon | $21,000 |
Breakeven: The higher upfront cost is offset by year 15.0, after which solar stays cheaper.
- This uses planning estimates you entered, not a contractor quote or guaranteed savings.
- This compares two competing uses of a limited budget; it does not evaluate spending on both at once.
What this also tells you: Even if your annual costs are 20% higher or lower than entered, the same option stays cheaper, with the advantage ranging from $2,800 to $1,200.
This is a planning estimate based on your entries. It does not size equipment, determine electrical or building-code compliance, verify incentive eligibility, or replace a contractor quote or professional energy audit.
Why this decision comes up
A household with one major home-energy budget and two compelling options benefits from seeing them compared directly rather than evaluated in isolation.
How this is calculated
Both paths are compared as total cost over your ownership horizon: net cost plus annual cost carried forward.
A worked example
With the defaults (solar: $16,000 net cost, $700/year; heat pump conversion: $10,000 net cost, $1,100/year; 10-year horizon), the heat pump conversion totals $21,000 against $23,000 for solar, a $2,000 advantage for the heat pump conversion at these defaults, driven by its lower upfront cost.
Common mistakes
A common mistake is assuming solar always wins because it's the more commonly discussed purchase. Run your own numbers rather than assuming either option automatically wins.
Limitations
This does not model how electrifying heating first might improve solar's later economics by increasing your electricity usage. Consider sequencing effects alongside this comparison.
Common questions
Why compare these two specifically?
Solar and a heat pump conversion are often the two largest home-energy investments a household considers, and a limited budget frequently forces a choice between them.
Does doing the heat pump first change solar's economics later?
Potentially yes: electrifying heating increases your electricity usage, which can improve solar's value once installed, since more of your consumption becomes solar-offsettable.
What if I want to eventually do both?
This tool compares which to prioritize first with a limited budget. See the electrification sequencing tool for that framing if solar isn't part of your immediate consideration.
Does this account for stacking incentives if I do both eventually?
No, this compares which to do first with a limited budget now. Incentive stacking across multiple projects is a separate consideration each individual tool's incentive-impact version can help you model.
What if my roof needs replacement before solar makes sense?
A roof replacement is a real prerequisite cost some homeowners overlook. If yours needs one, add that cost to solar's side of this comparison rather than treating it as a separate, unrelated expense.