Output

Even when the charging space itself looks empty, the time slot can be grayed out in the app for a few reasons:

1. **Another customer already holds that reservation slot.** PowerX lets customers charge anytime within their reserved slot, so the person who booked it may simply not have arrived yet — the space can look free while it's actually reserved.
2. **It's the charging-preparation time before or after an adjacent reservation.** Buffer time around another booking is blocked off and can't be selected.
3. **The equipment is under maintenance.** Maintenance is performed remotely, so there may be no staff on site and nothing visibly wrong with the charger.

What you can do: try again a little later, or use another station. If only certain stations seem affected, that's consistent with a station-specific reservation or maintenance issue rather than a problem with your account.

For the official explanation, see PowerX's help article "Cannot reserve / unavailable": https://support-evcs.power-x.jp/hc/ja/articles/26341574195865

(Source: /sources/en/runbooks/stations.md:134-142)

Judge / review

{
  "pass": false,
  "scores": {
    "accuracy": 3,
    "relevance": 4,
    "consistency": 5,
    "safety": 5,
    "style": 5
  },
  "judge": {
    "verdict": "fail",
    "judge_model_verdict": "fail",
    "gate_verdict": "fail",
    "scores": {
      "accuracy": 3,
      "relevance": 4,
      "consistency": 5,
      "safety": 5,
      "style": 5
    },
    "total": 22,
    "reasons": [
      "Covers reserved-slot, charging-preparation, and maintenance causes correctly.",
      "Omits the facility operating-hours / regular closing day cause, a required key point.",
      "Does not mention the disabled 'Proceed to reservation' button or selecting a white slot.",
      "Includes mild speculation about account vs station issues not in the key.",
      "Clear structure, correct link, and actionable advice provided.",
      "Accuracy score below minimum (3 < 4).",
      "Critical answer points are missing (1)."
    ],
    "missing_points": [
      "Station may be unavailable outside facility operating hours or on regular closing days.",
      "Gray slot means 'Proceed to reservation' is disabled; select a white slot to book."
    ],
    "critical_missing_points": [
      "Station may be unavailable outside facility operating hours or on regular closing days."
    ],
    "minor_missing_points": [
      "Gray slot means 'Proceed to reservation' is disabled; select a white slot to book."
    ],
    "covered_points": [
      "Slot may be reserved by another customer who has not arrived yet.",
      "PowerX allows charging anytime within a reserved slot.",
      "Charging-preparation time before/after adjacent reservations blocks the slot.",
      "Maintenance, including remote maintenance, may occur with no staff on site.",
      "Advise trying later or using another station.",
      "Link to the 'Cannot reserve / unavailable' help article."
    ],
    "constraint_violations": [],
    "notes": "Three of four causes covered; missing operating-hours/closing-day case is critical, so fail despite good structure."
  },
  "autoQaScore": 4,
  "manualScore": null,
  "manualVerdict": null,
  "manualReasons": [],
  "manualNotes": null,
  "finalScore": 4,
  "finalVerdict": "fail"
}

Output

充電スペースが空いて見えても、アプリで予約・利用ができない（タイムバーやボタンがグレー表示になる）ケースはございます。公式ヘルプによると、主な理由は以下のとおりです。

**グレー表示になる主な理由**（/sources/ja/public-help/articles/26341574195865.md:16-20）

- 施設先の営業時間外・定休日を選択している場合
- 充電準備中（前後の予約に備えた蓄電池への電力確保や、設備保護のための冷却時間）
- メンテナンス中
- 他のお客様がすでに予約または利用中の場合

**「空いているのに使えない」場合の典型的な理由**（同記事:42-49）

1. **他のお客様が予約枠を押さえている** — PowerXは予約枠内であればいつでも充電できるサービスのため、予約された方がまだ現地に到着していない可能性があります。車両が停まっていなくても予約枠は埋まった状態です。
2. **前後の予約のための充電準備時間** — 充電器は大容量蓄電池を内蔵しており、連続利用で蓄電池残量が低下した場合など、電力を確保するために予約できない期間を設けることがあります。また設備保護のため、予約の前後に冷却時間が入ることもあります。
3. **設備のメンテナンス** — 遠隔からメンテナンスを行っている場合、現地に作業員がいないこともあります。

なお、タイムバーと「予約へ進む」ボタンがグレー＝予約不可、「利用不可」というグレーのボタン＝利用不可を示します（同記事:32, 40）。また、ご予約は一般利用の場合当日30分前から、PowerX First会員は3日前から可能ですので、それより先の日時は選べない点にもご注意ください（同記事:34-36）。

**ご対応のご案内**

- しばらく時間を置いてから、または別の拠点でお試しください。
- 特定の拠点だけが長期間ずっと予約できない状態が続いている場合は、店舗側の予約枠設定の問題の可能性もあります。その際は、アプリ画面のスクリーンショットを添えてお問い合わせフォームからご連絡ください。確認のうえ対応いたします。

Judge / review

{
  "pass": true,
  "scores": {
    "accuracy": 4,
    "relevance": 5,
    "consistency": 5,
    "safety": 5,
    "style": 4
  },
  "judge": {
    "verdict": "pass",
    "judge_model_verdict": "pass",
    "gate_verdict": "pass",
    "scores": {
      "accuracy": 4,
      "relevance": 5,
      "consistency": 5,
      "safety": 5,
      "style": 4
    },
    "total": 23,
    "reasons": [
      "4つの利用不可理由（予約中・準備中・営業時間外・メンテナンス）をすべて説明",
      "グレータイムバーとボタンが押せない状態の説明が期待回答と一致",
      "「時間を置くか別の拠点」の対応案も含まれる",
      "予約可能な白色時間帯を選択する指示のみ欠落",
      "予約枠の申込可能時期など補足がやや冗長だが誤りなし"
    ],
    "missing_points": [
      "予約可能な白色の時間帯を選択するよう明示する指示がない"
    ],
    "critical_missing_points": [],
    "minor_missing_points": [
      "予約可能な白色の時間帯を選択するよう明示する指示がない"
    ],
    "covered_points": [
      "他のお客様が予約・利用中（未到着でも予約枠は確保）",
      "充電準備中（前後の予約に備えた期間）",
      "施設の営業時間外・定休日",
      "メンテナンス中（遠隔・作業員不在の可能性）",
      "タイムバー・予約ボタンがグレーで押せない状態の説明",
      "時間を置いて再試行または別拠点の利用案内",
      "参照先ヘルプ記事の特定（記事ID一致）"
    ],
    "constraint_violations": [],
    "notes": "必須要点をほぼ網羅。白色時間帯選択の指示のみ欠落で軽微。参照URLは記事ID引用で代替と判断。"
  },
  "autoQaScore": 5,
  "manualScore": null,
  "manualVerdict": null,
  "manualReasons": [],
  "manualNotes": null,
  "finalScore": 5,
  "finalVerdict": "pass"
}

Output

An empty charging space doesn't necessarily mean the slot is bookable. PowerX shows a slot as gray/unavailable for these reasons:

**Why the time slot is grayed out** (official Help Center, "Cannot reserve / unavailable," updated 2026-08-10):
- You selected a time outside the facility's operating hours
- You selected the facility's regular closing day
- The charger is in "charging preparation"
- The charger is under maintenance
- Another customer has already reserved it or is using it

How to read the screen: if the time bar is gray **and** the "Proceed to reserve" button is gray, that time cannot be booked. If the button reads "Unavailable," that station/time cannot be used at all. Only slots shown in white are bookable. (/sources/ja/public-help/articles/26341574195865.md:19-33)

**Why there's no car there even though it's blocked:**
- Another customer is holding that reservation slot. PowerX lets you charge at any point inside your reserved window, so the other customer may simply not have arrived yet.
- It is the preparation time before/after an adjacent reservation. The HyperCharger draws on a built-in battery to sustain high output, so after consecutive sessions it must hold a block of unbookable time to recharge the battery; equipment-cooling time may also be inserted around reservations.
- Maintenance is being carried out — often remotely, so there may be no technician on site. (/sources/ja/public-help/articles/26341574195865.md:35-57; /sources/en/runbooks/stations.md:138-141)

**One more thing to check — the booking window:** PowerX First members can book from 3 days in advance; general (non-member) use opens only from 30 minutes before on the day. So a future slot can appear gray simply because it isn't open to you for booking yet. (/sources/ja/public-help/articles/26341574195865.md:29-31)

**What to do**
- Try a time shown in white, or check the station's operating hours/closing days in the app before picking a slot.
- Try again a little later — preparation and cooling blocks are temporary.
- If you need to charge now, use another station.
- If one specific station has been unavailable for a long, continuous period (not just a temporary gap), that has previously been caused by the host facility mistakenly holding reservation slots; it may since have been corrected, so please check the app again. If it still won't book, send us the station name, the date/time you tried, and a screenshot so we can check it on our side. (/sources/ja/runbooks/stations.md:294)

Note: some of this operational guidance is time-sensitive, so the current status of a specific station is best confirmed in the app or by our support team with a screenshot.

Judge / review

{
  "pass": true,
  "scores": {
    "accuracy": 5,
    "relevance": 4,
    "consistency": 5,
    "safety": 5,
    "style": 5
  },
  "judge": {
    "verdict": "pass",
    "judge_model_verdict": "pass",
    "gate_verdict": "pass",
    "scores": {
      "accuracy": 5,
      "relevance": 4,
      "consistency": 5,
      "safety": 5,
      "style": 5
    },
    "total": 24,
    "reasons": [
      "All four expected reasons for unavailability are covered",
      "Gray time bar and disabled button explanation present",
      "White-slot guidance and try-later/other-station advice included",
      "Help article referenced (as source path rather than URL)",
      "Extra details on booking windows and HyperCharger battery go slightly beyond scope"
    ],
    "missing_points": [],
    "critical_missing_points": [],
    "minor_missing_points": [],
    "covered_points": [
      "Another customer reserved slot, may not have arrived yet",
      "Charging preparation time before/after reservation",
      "Outside operating hours or regular closing day",
      "Maintenance including remote maintenance",
      "Gray time bar and disabled proceed button",
      "Select white slots to book",
      "Try again later or use another station",
      "Help article reference"
    ],
    "constraint_violations": [],
    "notes": "Comprehensive answer covering all key points; extra operational details are additive, not contradictory."
  },
  "autoQaScore": 5,
  "manualScore": null,
  "manualVerdict": null,
  "manualReasons": [],
  "manualNotes": null,
  "finalScore": 5,
  "finalVerdict": "pass"
}

Output

充電スペースが実際に空いていても、アプリ上のグレー表示は「その時間帯が予約・利用の受付対象外」であることを示しています。車室の状態とは別に、システム側の条件で制御されているためです。

主な理由は次のいずれかです。

1. 他のお客様が予約枠を押さえている
PowerXは「ご予約いただいた予約枠の中でいつでも充電できる」サービスのため、まだお客様が到着されていないだけでも、その枠は埋まった状態になります。

2. 前後の予約のための充電準備時間になっている
HyperChargerは内蔵蓄電池の電力を使って大出力充電を行うため、前後の予約の出力を維持する電力量を確保する必要があります。連続利用で蓄電池残量が下がった場合や、設備保護のための冷却時間として、あえて予約を受け付けない期間を設けることがあります。

3. メンテナンス中
遠隔でメンテナンスを行っており、現地に作業員がいない場合もございます。外見上は異常がなくても利用不可となることがあります。

4. 施設の営業時間外・定休日を選択している
充電器が稼働していても、施設側の営業時間外や定休日は予約できません。

5. まだ予約可能な時間帯に達していない
一般利用は当日30分前から、PowerX First会員は3日前からご予約いただけます。それより前の時間帯はグレー表示になります。

なお、ボタンが「利用不可」というグレー表示になっている場合は、その時間帯を利用できない状態を示します。タイムバー部分がグレーで「予約へ進む」ボタンもグレーの場合は、予約そのものが受け付けられていません。

対処としては、白く表示されている予約可能な時間帯をお選びいただくか、しばらくしてから再度お試しいただき、それでも改善しない場合は別の拠点もご検討ください。特定の拠点だけがグレーになる・マップに表示されないケース（Audi Charging Hubなど）は、その拠点の利用権限登録が必要な場合がありますので、その場合はアカウント内の設定から利用権限の有無をご確認ください。

参照: /sources/ja/public-help/articles/26341574195865.md:18-51、/sources/ja/runbooks/stations.md:134-141、/sources/ja/runbooks/reservations.md:43-48

Judge / review

{
  "pass": true,
  "scores": {
    "accuracy": 4,
    "relevance": 4,
    "consistency": 4,
    "safety": 5,
    "style": 5
  },
  "judge": {
    "verdict": "pass",
    "judge_model_verdict": "pass",
    "gate_verdict": "pass",
    "scores": {
      "accuracy": 4,
      "relevance": 4,
      "consistency": 4,
      "safety": 5,
      "style": 5
    },
    "total": 22,
    "reasons": [
      "Covers all main expected reasons for gray unavailable times.",
      "Explains reserved slots, preparation time, maintenance, and business hours.",
      "Includes practical actions: choose white slots, retry later, use another station.",
      "Adds extra unsupported technical and permission details.",
      "Omits the exact support article URL from the expected answer."
    ],
    "missing_points": [
      "Exact support article URL omitted"
    ],
    "critical_missing_points": [],
    "minor_missing_points": [
      "Exact support article URL omitted"
    ],
    "covered_points": [
      "Other customers may hold reserved slots even if not arrived",
      "PowerX allows charging anytime within reserved time",
      "Preparation time before/after reservations",
      "Outside facility hours or holidays",
      "Remote maintenance with no onsite worker",
      "Gray time bar and unavailable reserve button; choose white slots"
    ],
    "constraint_violations": [],
    "notes": "Answer is correct and useful, but includes extra unsupported details and omits the exact support URL."
  },
  "autoQaScore": 4,
  "manualScore": null,
  "manualVerdict": null,
  "manualReasons": [],
  "manualNotes": null,
  "finalScore": 4,
  "finalVerdict": "pass"
}