diff --git a/src/modules/energy/HydrogenDaily.tsx b/src/modules/energy/HydrogenDaily.tsx
index e37c59c..39ac03f 100644
--- a/src/modules/energy/HydrogenDaily.tsx
+++ b/src/modules/energy/HydrogenDaily.tsx
@@ -197,9 +197,9 @@ export default function HydrogenDaily() {
                       >
                         <span className="text-[12px] text-slate-600 truncate">
                           {s.name}
-                          <span className="md:hidden text-slate-400 text-[10px]"> · {s.pricePerKg == null ? '—' : s.pricePerKg}</span>
+                          <span className="md:hidden text-slate-400 text-[10px]"> · {s.pricePerKg}</span>
                         </span>
-                        <span className="hidden md:block text-right text-[12px] text-slate-500 font-bold tabular-nums">{s.pricePerKg == null ? '—' : s.pricePerKg}</span>
+                        <span className="hidden md:block text-right text-[12px] text-slate-500 font-bold tabular-nums">{s.pricePerKg}</span>
                         <span className="text-right text-[12px] text-slate-700 font-bold tabular-nums">
                           {s.kg.toLocaleString('zh-CN', { maximumFractionDigits: 2 })}
                         </span>
diff --git a/src/modules/energy/types.ts b/src/modules/energy/types.ts
index a2d6b08..5c3f4c7 100644
--- a/src/modules/energy/types.ts
+++ b/src/modules/energy/types.ts
@@ -31,7 +31,7 @@ export interface HydrogenRegionShare {
 
 export interface HydrogenStationRow {
   name: string;
-  pricePerKg: number | null;
+  pricePerKg: number;
   kg: number;
   chainPct: number;
 }
diff --git a/src/server/routes/energy/index.ts b/src/server/routes/energy/index.ts
index 072144c..2fb28d0 100644
--- a/src/server/routes/energy/index.ts
+++ b/src/server/routes/energy/index.ts
@@ -175,8 +175,8 @@ app.get('/hydrogen/daily', async (c) => {
                      CASE WHEN b.hydrogen_station_id IS NULL THEN '未关联站点'
                           ELSE CONCAT('未知站点 #', b.hydrogen_station_id) END) AS stationName,
             ROUND(SUM(b.hydrogen_quantity), 2) AS kg,
-            CASE WHEN MIN(b.cost_price) = MAX(b.cost_price) THEN MIN(b.cost_price)
-                 ELSE NULL END AS pricePerKg
+            -- 单价：直接取订单中的成本价（不重算）。MAX 自然忽略 0 元的免费/赠送单
+            MAX(b.cost_price) AS pricePerKg
      FROM tab_energy_hydrogen_bill b
      LEFT JOIN tab_hydrogen_site s ON s.id = b.hydrogen_station_id
      LEFT JOIN tab_outside_hydrogen_site os ON os.inner_site_id = b.hydrogen_station_id
@@ -188,13 +188,13 @@ app.get('/hydrogen/daily', async (c) => {
 
   // 站点环比：同站点上一条记录的 kg
   // 按 stationId 分组、按日期升序计算
-  type StationRow = { date: string; stationId: number; name: string; kg: number; pricePerKg: number | null };
+  type StationRow = { date: string; stationId: number; name: string; kg: number; pricePerKg: number };
   const flat: StationRow[] = stationRows.map(r => ({
     date: r.d as string,
     stationId: Number(r.stationId),
     name: r.stationName as string,
     kg: Number(r.kg) || 0,
-    pricePerKg: r.pricePerKg == null ? null : Number(r.pricePerKg),
+    pricePerKg: Number(r.pricePerKg) || 0,
   }));
 
   // 计算日级总量 + 日级环比
@@ -244,7 +244,7 @@ app.get('/hydrogen/daily', async (c) => {
         .sort((a, b) => b.kg - a.kg)
         .map(s => ({
           name: s.name,
-          pricePerKg: s.pricePerKg == null ? null : Math.round(s.pricePerKg * 100) / 100,
+          pricePerKg: Math.round(s.pricePerKg * 100) / 100,
           kg: Math.round(s.kg * 100) / 100,
           chainPct: stationChain.get(`${s.date}|${s.stationId}`) ?? 0,
         })),