But, is solar worth it?

Yes. Since installing solar I've saved ¥30,459 in electricity costs.

Here's a breakdown for each billing period since my installation.

Jan 15 ~ Feb 14

I consumed 355.46kWh and generated 216.36kWh.

This would have cost me ¥13,956 without solar.

My actual cost was ¥9,831.

I saved ¥4,126 with generation and earned ¥897 for a total savings of ¥5,023
Date Generation Consumption Bought Sold
2023/01/15 0.81 11.21 10.40 0.00
2023/01/16 0.60 14.20 13.60 0.00
2023/01/17 5.03 17.23 12.80 0.60
2023/01/18 6.27 16.27 10.50 0.50
2023/01/19 4.83 14.43 10.30 0.70
2023/01/20 14.02 14.02 2.70 2.70
2023/01/21 7.22 14.02 7.70 0.90
2023/01/22 11.09 16.49 6.60 1.20
2023/01/23 3.39 15.59 12.60 0.40
2023/01/24 7.83 16.33 9.40 0.90
2023/01/25 15.05 25.15 12.10 2.00
2023/01/26 14.74 21.54 10.60 3.80
2023/01/27 4.61 18.91 14.70 0.40
2023/01/28 12.73 14.93 4.90 2.70
2023/01/29 13.13 16.93 4.80 1.00
2023/01/30 15.06 19.86 8.70 3.90
2023/01/31 10.18 16.38 7.60 1.40
2023/02/01 12.38 18.58 8.70 2.50
2023/02/02 5.10 15.60 11.00 0.50
2023/02/03 3.58 10.48 7.50 0.60
2023/02/04 12.85 9.65 2.00 5.20
2023/02/05 14.11 5.91 0.80 9.00
2023/02/06 13.64 6.14 0.80 8.30
2023/02/07 8.13 5.33 0.80 3.60
2023/02/08 0.00 0.30 0.30 0.00
2023/02/09 0.00 0.00 0.00 0.00
2023/02/10 0.00 0.00 0.00 0.00
2023/02/11 0.00 0.00 0.00 0.00
2023/02/12 0.00 0.00 0.00 0.00
2023/02/13 0.00 0.00 0.00 0.00
2023/02/14 0.00 0.00 0.00 0.00

Dec 15 ~ Jan 14

I consumed 476.55kWh and generated 347.75kWh.

This would have cost me ¥19,129 without solar.

My actual cost was ¥10,114.

I saved ¥9,016 with generation and earned ¥1,458 for a total savings of ¥10,474
Date Generation Consumption Bought Sold
2022/12/15 11.99 14.99 6.20 3.40
2022/12/16 12.98 14.08 5.90 4.90
2022/12/17 3.16 15.16 12.10 0.20
2022/12/18 12.28 15.18 5.70 3.10
2022/12/19 14.05 18.95 8.60 4.00
2022/12/20 13.12 18.12 8.50 3.60
2022/12/21 5.64 15.24 9.80 0.50
2022/12/22 2.99 12.69 7.20 0.40
2022/12/23 14.40 14.00 4.20 5.20
2022/12/24 13.60 16.30 4.90 2.20
2022/12/25 12.67 14.47 4.40 2.60
2022/12/26 13.34 15.84 6.80 4.30
2022/12/27 13.68 17.18 6.50 3.00
2022/12/28 11.98 14.48 5.30 2.80
2022/12/29 13.08 8.58 1.10 5.60
2022/12/30 10.35 14.45 5.30 1.20
2022/12/31 4.23 13.73 10.30 0.80
2023/01/01 13.69 16.19 7.60 5.10
2023/01/02 10.96 16.96 7.10 1.10
2023/01/03 13.24 16.34 6.20 3.10
2023/01/04 12.98 16.98 7.40 3.40
2023/01/05 13.30 18.60 8.40 3.10
2023/01/06 10.75 15.15 6.50 2.10
2023/01/07 12.78 15.58 5.60 2.80
2023/01/08 13.02 16.12 6.00 2.90
2023/01/09 13.22 14.72 5.30 3.80
2023/01/10 14.02 15.52 5.70 4.20
2023/01/11 12.42 18.52 8.00 1.90
2023/01/12 12.61 18.51 8.10 2.20
2023/01/13 10.26 12.26 4.30 2.30
2023/01/14 0.99 11.69 10.70 0.00

Nov 15 ~ Dec 14

I consumed 378.59kWh and generated 249.79kWh.

This would have cost me ¥14,522 without solar.

My actual cost was ¥9,446.

I saved ¥5,076 with generation and earned ¥986 for a total savings of ¥6,061
Date Generation Consumption Bought Sold
2022/11/15 3.96 10.76 7.00 0.70
2022/11/16 13.95 13.16 3.30 4.40
2022/11/17 10.96 12.56 3.10 1.50
2022/11/18 12.87 14.77 3.10 1.70
2022/11/19 13.49 13.59 3.40 3.30
2022/11/20 2.33 10.83 8.40 0.30
2022/11/21 6.98 11.48 4.60 1.00
2022/11/22 12.36 11.96 3.60 4.00
2022/11/23 0.61 11.71 10.90 0.00
2022/11/24 12.35 11.85 3.20 3.70
2022/11/25 13.33 10.43 2.20 5.10
2022/11/26 5.01 10.21 5.80 0.90
2022/11/27 13.46 11.56 2.70 4.80
2022/11/28 3.12 10.72 7.70 0.40
2022/11/29 3.25 10.35 7.60 0.60
2022/11/30 3.63 10.23 7.00 0.60
2022/12/01 1.23 10.93 9.50 0.00
2022/12/02 5.16 12.46 8.00 1.00
2022/12/03 7.84 12.24 5.30 1.00
2022/12/04 7.92 13.52 6.40 0.90
2022/12/05 1.66 13.66 11.70 0.00
2022/12/06 4.28 14.28 10.40 0.60
2022/12/07 12.48 16.58 6.40 2.40
2022/12/08 12.94 14.84 5.40 3.50
2022/12/09 10.09 12.89 5.20 2.60
2022/12/10 13.00 13.90 4.80 3.90
2022/12/11 8.62 12.82 5.10 1.00
2022/12/12 13.30 15.70 5.60 3.30
2022/12/13 6.47 14.37 8.50 0.90
2022/12/14 13.15 14.25 5.00 3.90

Oct 15 ~ Nov 14

I consumed 291.31kWh and generated 282.76kWh.

This would have cost me ¥10,503 without solar.

My actual cost was ¥3,074.

I saved ¥7,428 with generation and earned ¥1,473 for a total savings of ¥8,901
Date Generation Consumption Bought Sold
2022/10/15 0.00 0.00 0.00 0.00
2022/10/16 0.00 0.00 0.00 0.00
2022/10/17 0.00 0.00 0.00 0.00
2022/10/18 2.25 6.20 4.40 0.45
2022/10/19 6.16 8.96 3.60 0.80
2022/10/20 15.93 11.63 2.20 6.50
2022/10/21 14.66 10.86 1.30 5.10
2022/10/22 4.25 7.45 3.80 0.60
2022/10/23 14.57 9.77 1.70 6.50
2022/10/24 4.61 8.51 4.60 0.70
2022/10/25 2.38 10.68 8.50 0.20
2022/10/26 15.72 12.72 3.80 6.80
2022/10/27 11.00 12.10 2.60 1.50
2022/10/28 4.59 7.59 3.90 0.90
2022/10/29 14.46 11.56 2.70 5.60
2022/10/30 13.00 11.70 2.30 3.70
2022/10/31 15.13 10.63 2.10 6.60
2022/11/01 3.37 9.17 6.20 0.50
2022/11/02 14.38 12.28 2.50 4.60
2022/11/03 14.71 10.21 1.50 6.10
2022/11/04 13.12 11.82 2.50 3.80
2022/11/05 7.06 9.46 2.90 0.90
2022/11/06 13.79 10.39 2.50 6.00
2022/11/07 6.72 11.22 5.10 0.90
2022/11/08 14.07 12.47 2.80 4.50
2022/11/09 10.96 10.46 2.20 2.70
2022/11/10 9.54 9.94 2.20 1.80
2022/11/11 13.29 11.59 1.80 3.50
2022/11/12 12.71 10.31 2.00 4.40
2022/11/13 6.61 10.71 4.60 0.60
2022/11/14 3.75 10.95 7.30 0.40

Made by James Van Dyne.