I am looking at either a PV system or solar hot water. Which has the biggest ROI?

Question

I am looking at either a PV system or solar hot water. Which has the biggest ROI?

Asked by Terry Luttrell

I am looking to install either a PV system or solar hot water.

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Answers

Paul Rosen's picture

Generally, solar hot water will give you more "bang for the buck."

  • PV is 12-22% efficient and expensive compared to solar hot water, which is 60+% efficient.
  • If the budget allows, both are great.

My favorite saying is "reduce then produce".

  • First look at ways to reduce you utility bills by upgrading the efficiency of you home: insulation, air sealing leaks, fixing leaky ducts if you have forced air heat, etc.
  • A great website to find all about this stuff is buildingscience.com.

For more information:

Read "Can you tell me how well solar hot-water heaters work?" a Q&A answered by Paul Rosen.