BESS simulation
Network loss factor (託送損失率)
The regulated area and voltage-specific loss factor used to gross up demand procurement quantities. It is separate from the battery's physical round-trip loss and its contracted chargeable storage loss.
Connection
Network loss (%)
Effective-date history. Each line holds its published rate until the next entered version; draft values have not yet been checked against the source page.Current rates by area
In force on 2026-11-11, with the next published change. Drafts are read from the tariff PDFs and not yet checked against the page.
| Area | Network loss (%) | From | Next change | Status | Source |
|---|---|---|---|---|---|
| Hokkaido | 2.00 | 2026-11-01 | — | draft | hepco.co.jp · p. 109 |
| Tohoku | 1.90 | 2026-11-01 | — | draft | nw.tohoku-epco.co.jp · p. 88 |
| Tokyo | Not entered yet: the simulation uses METI's national average. | ||||
| Chubu | 2.50 | 2026-11-01 | — | draft | powergrid.chuden.co.jp · p. 161 |
| Hokuriku | 1.30 | 2026-10-01 | — | draft | rikuden.co.jp · p. 122 |
| Kansai | 2.90 | 2026-11-01 | — | draft | kansai-td.co.jp · p. 129 |
| Chugoku | 2.50 | 2026-11-01 | — | draft | energia.co.jp · p. 139 |
| Shikoku | 1.30 | 2026-10-01 | — | draft | yonden.co.jp · p. 101 |
| Kyushu | 1.30 | 2026-11-01 | — | draft | kyuden.co.jp · p. 146 |
| Okinawa | Not entered yet: the simulation uses METI's national average. | ||||
History
Every version, newest first. A new version is listed whenever the tariff was re-issued, even if a rate did not change.
| Area | From | Until | Network loss (%) | Change (Network loss) | Status | Source |
|---|---|---|---|---|---|---|
| Kyushu | 2026-11-01 | — | 1.30 | — | draft | kyuden.co.jp · p. 146 |
| Kyushu | 2026-10-01 | 2026-11-01 | 1.30 | — | draft | kyuden.co.jp · p. 146 |
| Kyushu | 2026-04-01 | 2026-10-01 | 1.30 | — | draft | kyuden.co.jp · p. 145 |
| Kyushu | 2025-04-01 | 2026-04-01 | 1.30 | — | draft | kyuden.co.jp · p. 140 |
| Kyushu | 2024-10-01 | 2025-04-01 | 1.30 | — | draft | kyuden.co.jp · p. 140 |
| Kyushu | 2024-04-01 | 2024-10-01 | 1.30 | — | draft | kyuden.co.jp · p. 129 |
| Kyushu | 2023-12-27 | 2024-04-01 | 1.30 | — | draft | kyuden.co.jp · p. 120 |
| Kyushu | 2023-04-01 | 2023-12-27 | 1.30 | — | draft | kyuden.co.jp · p. 113 |
| Kyushu | 2022-07-01 | 2023-04-01 | 1.30 | — | draft | kyuden.co.jp · p. 109 |
| Kyushu | 2022-04-12 | 2022-07-01 | 1.30 | — | draft | kyuden.co.jp · p. 109 |
| Kyushu | 2022-04-01 | 2022-04-12 | 1.30 | — | draft | kyuden.co.jp · p. 109 |
| Kyushu | 2022-01-01 | 2022-04-01 | 1.30 | — | draft | kyuden.co.jp · p. 109 |
| Kyushu | 2021-04-01 | 2022-01-01 | 1.30 | — | draft | kyuden.co.jp · p. 108 |
| Kyushu | 2020-10-01 | 2021-04-01 | 1.30 | — | draft | kyuden.co.jp · p. 107 |
| Shikoku | 2026-10-01 | — | 1.30 | — | draft | yonden.co.jp · p. 101 |
| Chugoku | 2026-11-01 | — | 2.50 | — | draft | energia.co.jp · p. 139 |
| Chugoku | 2026-10-01 | 2026-11-01 | 2.50 | — | draft | energia.co.jp · p. 139 |
| Chugoku | 2026-04-01 | 2026-10-01 | 2.50 | — | draft | energia.co.jp · p. 139 |
| Kansai | 2026-11-01 | — | 2.90 | — | draft | kansai-td.co.jp · p. 129 |
| Kansai | 2026-10-01 | 2026-11-01 | 2.90 | — | draft | kansai-td.co.jp · p. 129 |
| Kansai | 2026-04-01 | 2026-10-01 | 2.90 | — | draft | kansai-td.co.jp · p. 129 |
| Kansai | 2025-04-01 | 2026-04-01 | 2.90 | — | draft | kansai-td.co.jp · p. 123 |
| Kansai | 2024-10-01 | 2025-04-01 | 2.90 | — | draft | kansai-td.co.jp · p. 122 |
| Kansai | 2024-04-01 | 2024-10-01 | 2.90 | — | draft | kansai-td.co.jp · p. 110 |
| Kansai | 2023-12-27 | 2024-04-01 | 2.90 | — | draft | kansai-td.co.jp · p. 102 |
| Kansai | 2023-04-01 | 2023-12-27 | 2.90 | +7.4% | draft | kansai-td.co.jp · p. 96 |
| Kansai | 2022-07-01 | 2023-04-01 | 2.70 | — | draft | kansai-td.co.jp · p. 96 |
| Kansai | 2022-04-12 | 2022-07-01 | 2.70 | — | draft | kansai-td.co.jp · p. 96 |
| Kansai | 2022-04-01 | 2022-04-12 | 2.70 | — | draft | kansai-td.co.jp · p. 96 |
| Kansai | 2022-01-01 | 2022-04-01 | 2.70 | — | draft | kansai-td.co.jp · p. 100 |
| Kansai | 2021-04-01 | 2022-01-01 | 2.70 | — | draft | kansai-td.co.jp · p. 100 |
| Kansai | 2020-10-01 | 2021-04-01 | 2.70 | — | draft | kansai-td.co.jp · p. 99 |
| Kansai | 2020-04-01 | 2020-10-01 | 2.70 | — | draft | kansai-td.co.jp · p. 94 |
| Kansai | 2020-02-01 | 2020-04-01 | 2.70 | -6.9% | draft | kansai-td.co.jp · p. 94 |
| Kansai | 2019-10-01 | 2020-02-01 | 2.90 | — | draft | kansai-td.co.jp · p. 94 |
| Hokuriku | 2026-10-01 | — | 1.30 | — | draft | rikuden.co.jp · p. 122 |
| Chubu | 2026-11-01 | — | 2.50 | — | draft | powergrid.chuden.co.jp · p. 161 |
| Chubu | 2026-10-01 | 2026-11-01 | 2.50 | — | draft | powergrid.chuden.co.jp · p. 161 |
| Tohoku | 2026-11-01 | — | 1.90 | — | draft | nw.tohoku-epco.co.jp · p. 88 |
| Tohoku | 2026-10-01 | 2026-11-01 | 1.90 | — | draft | nw.tohoku-epco.co.jp · p. 88 |
| Tohoku | 2026-04-01 | 2026-10-01 | 1.90 | — | draft | nw.tohoku-epco.co.jp · p. 88 |
| Hokkaido | 2026-11-01 | — | 2.00 | — | draft | hepco.co.jp · p. 109 |
| Hokkaido | 2026-10-01 | 2026-11-01 | 2.00 | — | draft | hepco.co.jp · p. 109 |
| Hokkaido | 2026-04-01 | 2026-10-01 | 2.00 | — | draft | hepco.co.jp · p. 108 |
| Hokkaido | 2024-04-01 | 2024-10-01 | 2.00 | — | draft | hepco.co.jp · p. 94 |
| Hokkaido | 2023-12-27 | 2024-04-01 | 2.00 | — | draft | hepco.co.jp · p. 88 |
| Hokkaido | 2023-07-01 | 2023-12-27 | 2.00 | — | draft | hepco.co.jp · p. 82 |
| Hokkaido | 2023-04-01 | 2023-07-01 | 2.00 | +11.1% | draft | hepco.co.jp · p. 82 |
| Hokkaido | 2022-07-01 | 2023-04-01 | 1.80 | — | draft | hepco.co.jp · p. 82 |
| Hokkaido | 2022-04-12 | 2022-07-01 | 1.80 | — | draft | hepco.co.jp · p. 81 |
| Hokkaido | 2022-04-01 | 2022-04-12 | 1.80 | +5.9% | draft | hepco.co.jp · p. 81 |
| Hokkaido | 2022-01-01 | 2022-04-01 | 1.70 | — | draft | hepco.co.jp · p. 81 |
| Hokkaido | 2021-04-01 | 2022-01-01 | 1.70 | +6.3% | draft | hepco.co.jp · p. 81 |
| Hokkaido | 2020-10-01 | 2021-04-01 | 1.60 | — | draft | hepco.co.jp · p. 81 |
| Hokkaido | 2020-04-01 | 2020-10-01 | 1.60 | — | draft | hepco.co.jp · p. 80 |
| Hokkaido | 2020-02-01 | 2020-04-01 | 1.60 | -27.3% | draft | hepco.co.jp · p. 80 |
| Hokkaido | 2019-10-01 | 2020-02-01 | 2.20 | — | draft | hepco.co.jp · p. 80 |