Should I switch to time of use electricity pricing?

71b4dddd3837fa7ac7e4c33e1a3fcf02?s=47 jtelszasz
February 04, 2015

Should I switch to time of use electricity pricing?

Analysis showing my cost savings by switching to a time of use electricity plan and the potential benefits of using a home battery system.

71b4dddd3837fa7ac7e4c33e1a3fcf02?s=128

jtelszasz

February 04, 2015
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Transcript

  1. Should I switch to time-of- use electricity pricing? Justin Elszasz

  2. Let’s look at the Baltimore Gas & Electric (BGE) Website.

  3. None
  4. Okay, so what does it cost?

  5. Rates are buried down here.

  6. None
  7. There are three pricing plans for residential customers.

  8. Standard Residential (No Time-of-Use)

  9. Residential Time-of-Use

  10. Electric Vehicle (More Agressive TOU Pricing)

  11. None
  12. This doesn’t answer my question.

  13. Let’s look at my electricity demand data.

  14. None
  15. BGE RL & EV Plan Peak Period My morning peak

    occurs outside BGE’s peak period in summer. This bodes well. My evening peak occurs mostly outside BGE’s peak period in summer.
  16. I do have base load during the day… …and part

    of my evening peak during BGE’s summer peak period. BGE RL & EV Plan Peak Period
  17. BGE RL & EV Plan Peak Period BGE RL &

    EV Plan Peak Period Again, my average morning during non-summer months starts before BGE’s non-summer peak.
  18. BGE RL & EV Plan Peak Period BGE RL &

    EV Plan Peak Period But part of my evening peak is during BGE’s non- summer peak period.
  19. Fun Fact 2: the difference between these two curves is

    my A/C load. Fun Fact 1: we have an electric water heater which likely constitutes this base load.
  20. So how much can I save on the time-of-use pricing

    plans?
  21. Compare the cost of the “RL” and “EV” plans to

    the normal residential rate.
  22. Step 1: Determine cost of electricity of every hour.

  23. Step 2: Multiply electricity cost by demand at every hour.

  24. None
  25. Total Electricity Used: 4115 kWh Total Savings on “RL” Plan:

    $24.06 Total Savings on “EV” Plan: $44.14
  26. Would battery storage help me take advantage of TOU pricing?

  27. Battery storage could minimize the load that occurs during peak

    period by shifting it to off-peak hours. BGE RL & EV Plan Peak Period
  28. None
  29. None
  30. I don’t have a full year of data. I’ll use

    a Green Button sample file.
  31. GreenButton Sample Data: https://collaborate.nist.gov/twiki-sggrid/bin/view/SmartGrid/GreenButtonSDK

  32. BGE RL & EV Plan Peak Period

  33. BGE RL & EV Plan Peak Period

  34. None
  35. None
  36. Next Questions Can this be the basis of a predictive

    model of future savings for consumers switching plans? Can we target customers in marketing the TOU pricing in order to optimize the benefits to the grid? Will Opower and BGE implement this simple analysis for residential customers?