Decisions Made Easier

This is a follow up to Decisions Made Easy. We now have 59 days of net metering data and are able to get a more accurate picture of what late-in-the-year rooftop residential PV looks like at our latitude.

2017-11-12 Sun: TOU $-0.48 vs flat-rate $-0.25
2017-11-13 Mon: TOU $-0.71 vs flat-rate $-0.31
2017-11-14 Tue: TOU $-0.31 vs flat-rate $ 0.00
2017-11-15 Wed: TOU $-0.37 vs flat-rate $ 0.11
2017-11-16 Thu: TOU $-0.19 vs flat-rate $ 0.12
2017-11-17 Fri: TOU $ 0.29 vs flat-rate $ 0.60
2017-11-18 Sat: TOU $ 0.42 vs flat-rate $ 0.78
2017-11-19 Sun: TOU $ 2.09 vs flat-rate $ 2.58
2017-11-20 Mon: TOU $-0.06 vs flat-rate $ 0.39
2017-11-21 Tue: TOU $ 1.18 vs flat-rate $ 1.35
2017-11-22 Wed: TOU $-0.22 vs flat-rate $ 0.06
Holiday: Thanksgiving
2017-11-23 Thu: TOU $ 0.91 vs flat-rate $ 1.11
2017-11-24 Fri: TOU $ 0.95 vs flat-rate $ 1.05
2017-11-25 Sat: TOU $ 0.76 vs flat-rate $ 1.07
2017-11-26 Sun: TOU $ 1.90 vs flat-rate $ 2.18
2017-11-27 Mon: TOU $ 0.58 vs flat-rate $ 0.78
2017-11-28 Tue: TOU $ 0.56 vs flat-rate $ 0.93
2017-11-29 Wed: TOU $ 0.05 vs flat-rate $ 0.47
2017-11-30 Thu: TOU $ 0.97 vs flat-rate $ 1.34
2017-12-01 Fri: TOU $ 2.26 vs flat-rate $ 2.55
2017-12-02 Sat: TOU $ 1.04 vs flat-rate $ 1.36
2017-12-03 Sun: TOU $ 2.60 vs flat-rate $ 2.86
2017-12-04 Mon: TOU $ 0.46 vs flat-rate $ 0.76
2017-12-05 Tue: TOU $ 0.69 vs flat-rate $ 1.02
2017-12-06 Wed: TOU $ 0.96 vs flat-rate $ 1.20
2017-12-07 Thu: TOU $ 2.21 vs flat-rate $ 2.26
2017-12-08 Fri: TOU $ 1.50 vs flat-rate $ 1.81
2017-12-09 Sat: TOU $ 0.80 vs flat-rate $ 1.16
2017-12-10 Sun: TOU $ 1.93 vs flat-rate $ 2.21
2017-12-11 Mon: TOU $ 1.04 vs flat-rate $ 1.49
2017-12-12 Tue: TOU $ 0.22 vs flat-rate $ 0.53
2017-12-13 Wed: TOU $ 1.03 vs flat-rate $ 1.52
2017-12-14 Thu: TOU $ 1.26 vs flat-rate $ 1.57
2017-12-15 Fri: TOU $-0.15 vs flat-rate $ 0.19
2017-12-16 Sat: TOU $ 1.81 vs flat-rate $ 2.11
2017-12-17 Sun: TOU $ 1.48 vs flat-rate $ 1.77
2017-12-18 Mon: TOU $ 1.62 vs flat-rate $ 1.99
2017-12-19 Tue: TOU $ 0.99 vs flat-rate $ 1.33
2017-12-20 Wed: TOU $ 0.95 vs flat-rate $ 1.34
2017-12-21 Thu: TOU $ 3.24 vs flat-rate $ 3.38
2017-12-22 Fri: TOU $ 3.22 vs flat-rate $ 3.53
2017-12-23 Sat: TOU $ 1.17 vs flat-rate $ 1.47
2017-12-24 Sun: TOU $ 3.15 vs flat-rate $ 3.46
Holiday: Christmas Day
2017-12-25 Mon: TOU $ 3.38 vs flat-rate $ 3.66
2017-12-26 Tue: TOU $ 3.87 vs flat-rate $ 3.92
2017-12-27 Wed: TOU $ 1.50 vs flat-rate $ 2.05
2017-12-28 Thu: TOU $ 1.02 vs flat-rate $ 1.34
2017-12-29 Fri: TOU $ 3.23 vs flat-rate $ 3.85
2017-12-30 Sat: TOU $ 0.82 vs flat-rate $ 1.25
2017-12-31 Sun: TOU $ 2.48 vs flat-rate $ 2.73
Holiday: New Year's Day
2018-01-01 Mon: TOU $ 2.30 vs flat-rate $ 2.80
2018-01-02 Tue: TOU $ 1.20 vs flat-rate $ 1.83
2018-01-03 Wed: TOU $ 1.42 vs flat-rate $ 1.93
2018-01-04 Thu: TOU $ 0.56 vs flat-rate $ 1.00
2018-01-05 Fri: TOU $ 2.44 vs flat-rate $ 3.17
2018-01-06 Sat: TOU $ 1.12 vs flat-rate $ 1.36
2018-01-07 Sun: TOU $ 1.28 vs flat-rate $ 1.81
2018-01-08 Mon: TOU $ 2.04 vs flat-rate $ 2.55
2018-01-09 Tue: TOU $ 1.43 vs flat-rate $ 2.00
=====TOU kWh======
On-Peak:       -24
Shoulder:      -48
Off-Peak:     1019
Total:         948
=======wins=======
TOU    59 (100.0%)
flat    0 (  0.0%)
====TOU costs=====
On-Peak:  $  -3.31
Shoulder: $  -5.03
Off-Peak: $  82.21
======costs=======
TOU sum:  $  73.88
flat sum: $  94.49

It’s not quite the ridiculous savings ratio indicated by the first few days of usage, but it’s still a savings, and accomplished by simply switching rates. I expect it to increase as the days do in sunlight.

I compared our first utility bill to the readings from the same (or very similar) interval and they matched pretty well for a $100 home energy meter:

Screen Shot 2018-01-10 at 11.47.09.png

=====TOU kWh======
On-Peak:         3
Shoulder:       60
Off-Peak:      272
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Author: PhilRW

software engineer, pianist, polymath

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