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.

Transcript

1. Should I switch to time-of- use electricity pricing? Justin Elszasz
2. Let’s look at the Baltimore Gas & Electric (BGE) Website.
4. Okay, so what does it cost?
5. Rates are buried down here.
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)
12. This doesn’t answer my question.
13. Let’s look at my electricity demand data.
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.
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
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
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?