Output

Good question — the key thing to know is that PowerX doesn't bill per minute at all, so a direct side-by-side with per-minute operators isn't apples-to-apples. Here's how to think about it:

**How PowerX billing works**
- PowerX uses pay-per-kWh (volume-based) billing: you pay for the amount of electricity actually charged, not for time. Even if you stop a 30-minute session at 15 minutes, you're only billed for the kWh delivered in those 15 minutes (en/runbooks/billing.md:189–197, 240–244).
- Current rates: regular rate is ¥65/kWh~, and PowerX First members get ¥45/kWh~ (always ¥20 off per kWh) (en/reference/membership.md:49–51).

**How to compare with a per-minute operator**
1. Estimate how much energy (kWh) your car actually accepts per minute at the station's output — PowerX stations offer 150 kW ultrafast charging, but the real speed depends on your vehicle's battery temperature and state of charge.
2. Multiply that estimated kWh by the per-kWh rate (¥65/kWh~ general, ¥45/kWh~ with PowerX First) to get an effective per-minute cost.
3. Compare that against the other company's per-minute rate. Keep in mind that with per-minute billing you pay for the full time even if charging slows down or stops early, whereas with PowerX you only pay for energy delivered.

**One more factor:** PowerX First costs ¥900/month and also includes booking up to 3 days ahead and reservations up to 75 minutes (en/reference/membership.md:22–28), so factor that membership fee into a total-cost comparison if you charge frequently.

For the full official pricing menu, see: https://support-evcs.power-x.jp/hc/ja/articles/26574552466457-%E5%85%85%E9%9B%BB%E6%96%99%E9%87%91%E3%83%A1%E3%83%8B%E3%83%A5%E3%83%BC%E3%81%AB%E3%81%A4%E3%81%84%E3%81%A6

If you tell me your vehicle model and typical charging session, I can help you work out an estimated per-session cost to compare against another operator's quote.

Judge / review

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Output

PowerXは分単位（時間）ではなく、充電した電力量（kWh）に応じた従量課金制のため、他社の「分単位料金」とはそのままの数字では比較できません。比較される場合は、以下の点を踏まえていただくと分かりやすくなります。

1. 比較の軸を「1kWhあたりの料金」に揃える
他社が分単位課金の場合、「その充電器の出力で○分間に何kWh充電できるか」を想定し、分単位料金×分数を充電量で割るなどして1kWhあたりに換算すると、PowerXと同じ基準で比べられます。なお、同じ時間でも車種や充電器の出力によって充電できる電力量は変わるため、kWh単価での比較がより公平です。

2. PowerXの料金メニューを確認する
PowerXの充電単価はメニュー（Economy／Regular／Premium）によって異なり、各ステーションの料金メニューはアプリ内でご確認いただけます。
充電料金メニューについて：https://support-evcs.power-x.jp/hc/ja/articles/26574552466457-%E5%85%85%E9%9B%BB%E6%96%99%E9%87%91%E3%83%A1%E3%83%8B%E3%83%A5%E3%83%BC%E3%81%AB%E3%81%A4%E3%81%84%E3%81%A6

3. PowerX Firstの割引も含めて比較する
PowerX Firstにご入会いただくと、一般会員より1kWhあたりの充電単価がお安くなります。ご利用頻度が高い場合は、会費を含めたトータルコストで比較するとより正確です。

なお、途中で充電を止めた場合も、止めるまでに充電した電力量分の料金となるため、時間のムダな課金は発生いたしません（/sources/ja/runbooks/billing.md のCS-128、CS-141参照）。最新の単価はアプリ内の料金メニューまたは上記公式ヘルプでご確認ください。

Judge / review

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    "total": 24,
    "reasons": [
      "kWh従量課金制である点を明確に説明し、分単位との比較不能性に言及",
      "1kWhあたりへの換算方法という実用的な比較手順を追加説明",
      "PowerX First割引と料金メニューURLを期待どおりに含む",
      "内部ソース参照（/sources/...）が顧客向け回答に混入しやや不自然"
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      "料金メニュー詳細の案内とサポート記事URLの提示"
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Output

PowerX does not bill by the minute, so a straight "yen per minute" comparison isn't apples-to-apples. Here's how to make the comparison fair.

1) Understand the two billing bases
- PowerX: pay-per-kWh (volume-based). You pay only for the energy actually delivered, at your menu's per-kWh rate. Time spent charging does not add cost, and if you stop early you're only billed for the kWh delivered (/sources/en/runbooks/billing.md:193, /sources/ja/runbooks/billing.md:193).
- Per-minute networks: you pay for elapsed time, so the effective cost rises whenever charging output is low (cold battery, high state of charge, temperature derating, shared charger).

2) Convert everything to yen per kWh (or cost per session)
- Competitor: (per-minute rate × minutes billed) ÷ kWh actually delivered = effective yen/kWh. Example: 100 yen/min for 15 min = 1,500 yen; if the car only took 8 kWh, that's about 188 yen/kWh.
- PowerX: kWh delivered × your per-kWh rate. Our runbook lists general-member rates of 65 / 70 / 75 yen per kWh (Economy / Regular / Premium) (/sources/en/runbooks/charging-use.md:105), and PowerX First as roughly 20 yen/kWh lower (guide: general 65-75, First 45-55) (/sources/en/runbooks/charging-use.md:248). These figures are flagged as time-sensitive in our internal guidance, so please confirm the current numbers on the official pricing-menu page before relying on them: https://support-evcs.power-x.jp/hc/ja/articles/26574552466457
- Easiest real-world test: do the same route/state-of-charge session on each network and compare "yen ÷ kWh added" from the receipt or app history.

3) Add the items that usually get missed
- Membership/subscription fee, amortised: break-even kWh = monthly fee ÷ per-kWh saving.
- Idle/occupancy or "connector blocking" fees, session or connection fees, cancellation/no-show fees, and whether prices are tax-inclusive.
- Whether the price changes with output level (under PowerX's volume billing it does not; output is also the same for First and general members and across menus) (/sources/en/runbooks/charging-troubleshooting.md:456-459).

4) Don't confuse time caps with time charges
Reservation slots (up to 30 minutes for general use, up to 75 minutes with PowerX First) limit how long you may occupy the charger; they are not a per-minute fee (/sources/en/runbooks/charging-use.md:248).

One limitation: this workspace contains PowerX's own pricing guidance but no competitor rate data and no current official price table text, so I can't produce a verified side-by-side comparison. If you tell me a competitor's per-minute rate and the kWh/time you typically get, I'll work out the effective yen/kWh for you.

Judge / review

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    "total": 25,
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      "Explains that PowerX First has a lower per-kWh price than general members.",
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Output

PowerXは電力量（kWh）単位の従量課金制で、充電にかかった時間ではなく、実際に充電した電力量に対して料金が発生します（/sources/ja/runbooks/billing.md:193）。30分枠でご予約いただいても、15分で充電を終えれば「15分間で充電された電力量 × 充電単価」の計算になります（/sources/ja/runbooks/billing.md:244）。また、現時点では予約時間終了後の超過料金は発生しません（/sources/ja/public-help/articles/28501958588313.md:20）。

そのため、他社の分単位料金と比較される場合は、双方を「1kWhあたりのコスト」に揃えていただくのが確実です。

計算の考え方は、他社の分あたり単価を、そのステーションの実効充電出力（kW）から求められる1分あたりの充電量で割る方法です。たとえば分あたり40円で平均50kW出力の場合は1分あたり約0.83kWhですので、40 ÷ 0.83 ≒ 48円/kWh相当となります。分あたり66円なら約79円/kWh相当です。

ただし分単位料金は、実際の充電出力が車両のバッテリー状態・温度・対応受電能力などで下がると、その分だけ1kWhあたりのコストが上がります。満充電に近い時間帯や、車両側の入力が小さいケースでは、表示上の分単価より割高になりやすい点にご留意ください。PowerXのkWh課金であれば、出力が変動しても支払総額は充電した電力量に比例します。

比較時には、充電単価以外もあわせてご確認いただくのがおすすめです。PowerXの一般会員は1kWhあたりEconomy 65円／Regular 70円／Premium 75円が目安で（/sources/ja/runbooks/charging-use.md:105）、会費制のPowerX Firstにご加入いただくと1kWhあたり20円引き（目安45〜55円/kWh）、予約が3日前から可能、予約枠は最大75分という特典がございます（/sources/ja/runbooks/charging-use.md:248）。他社と比較される際は、分単位料金に会員費・月額費・予約手数料が含まれるかも併せてご確認いただくと、実質的な総額での比較がしやすくなります。

料金メニューの詳細は、公式の「充電料金メニューについて」をご参照ください。
https://support-evcs.power-x.jp/hc/ja/articles/26574552466457

なお、料金・特典は時期により見られる場合がありますので、最新の金額はアプリ内または公式ページでのご確認をお願いいたします。

Judge / review

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      "公式の料金メニューURLを提示",
      "分単位料金との比較方法をkWh単価換算で説明",
      "日本語で丁寧かつ読みやすい"
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