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I need help with this sentence:

Thus, heat pumps can(,) for instance(,) run whenever there is a high generation of PV electricity(,) or there is a need to increase the electrical load in the grid.

So basically there are three commas that I am unsure about. I would tend to use them. Should I?

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  • "for instance" is a parenthetical. It's presence is not need for syntactic and semantic validity. Parentheticals are typically set off by commas.
    – Hot Licks
    Commented Apr 20, 2020 at 12:14
  • Thanks Hot Licks for your answer. So you would say that all three commas are okay?
    – PeterBe
    Commented Apr 20, 2020 at 12:17
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    Does this answer your question? Is "in fact" always set off by commas mid-sentence? (There are many other threads dealing with parentheticals also. Brackets with parentheticals may be helpful, mentioning zero punctuation instead of offsetting commas, a possibility here.)
    – Edwin Ashworth
    Commented Apr 20, 2020 at 14:57

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I wouldn't use the last comma, although it is possible to use it, and I'd either suppress one ellipsis or use one more (rather this latter possibility).

  • "Thus, heat pumps can, for instance, run whenever there is a high generation of PV electricity or whenever there is a need to increase the electical load in the grid".

  • "Thus, heat pumps can, for instance, run whenever there is a high generation of PV electricity) or a need to increase the electical load in the grid".

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