diff --git a/VERSIONS.json b/VERSIONS.json
index 54bbda9..c02bfad 100644
--- a/VERSIONS.json
+++ b/VERSIONS.json
@@ -1,9 +1,9 @@
 {
   "project": "zpark-ems",
-  "project_version": "1.6.0",
+  "project_version": "1.6.1",
   "customer": "Z-Park 中关村医疗器械园",
   "core_version": "1.4.0",
   "frontend_template_version": "1.4.0",
   "last_updated": "2026-04-06",
-  "notes": "String monitoring, I-V diagnosis stub, ROI simulator, knowledge base, remote config stub, mobile responsive"
+  "notes": "Fix devices.json protocol (http_api→sungrow_api) to enable Sungrow collectors"
 }
diff --git a/customers/zpark/devices.json b/customers/zpark/devices.json
index cf79304..a5f2dac 100644
--- a/customers/zpark/devices.json
+++ b/customers/zpark/devices.json
@@ -60,7 +60,7 @@
       "rated_power": 40,
       "model": "SG40KTL-M",
       "manufacturer": "阳光电源",
-      "protocol": "http_api",
+      "protocol": "sungrow_api",
       "collect_interval": 900,
       "connection_params": {
         "api_base": "https://gateway.isolarcloud.com",
@@ -81,7 +81,7 @@
       "rated_power": 50,
       "model": "SG50KTL-M",
       "manufacturer": "阳光电源",
-      "protocol": "http_api",
+      "protocol": "sungrow_api",
       "collect_interval": 900,
       "connection_params": {
         "api_base": "https://gateway.isolarcloud.com",
@@ -102,7 +102,7 @@
       "rated_power": 130,
       "model": "SG125HV",
       "manufacturer": "阳光电源",
-      "protocol": "http_api",
+      "protocol": "sungrow_api",
       "collect_interval": 900,
       "connection_params": {
         "api_base": "https://gateway.isolarcloud.com",
@@ -123,7 +123,7 @@
       "rated_power": 260,
       "model": "SG250HX",
       "manufacturer": "阳光电源",
-      "protocol": "http_api",
+      "protocol": "sungrow_api",
       "collect_interval": 900,
       "connection_params": {
         "api_base": "https://gateway.isolarcloud.com",
@@ -144,7 +144,7 @@
       "rated_power": 160,
       "model": "SG160HX",
       "manufacturer": "阳光电源",
-      "protocol": "http_api",
+      "protocol": "sungrow_api",
       "collect_interval": 900,
       "connection_params": {
         "api_base": "https://gateway.isolarcloud.com",
@@ -165,7 +165,7 @@
       "rated_power": 400,
       "model": "SG350HX",
       "manufacturer": "阳光电源",
-      "protocol": "http_api",
+      "protocol": "sungrow_api",
       "collect_interval": 900,
       "connection_params": {
         "api_base": "https://gateway.isolarcloud.com",
@@ -186,7 +186,7 @@
       "rated_power": 290,
       "model": "SG250HX",
       "manufacturer": "阳光电源",
-      "protocol": "http_api",
+      "protocol": "sungrow_api",
       "collect_interval": 900,
       "connection_params": {
         "api_base": "https://gateway.isolarcloud.com",
@@ -207,7 +207,7 @@
       "rated_power": 300,
       "model": "SG300HX",
       "manufacturer": "阳光电源",
-      "protocol": "http_api",
+      "protocol": "sungrow_api",
       "collect_interval": 900,
       "connection_params": {
         "api_base": "https://gateway.isolarcloud.com",
@@ -228,7 +228,7 @@
       "rated_power": 280,
       "model": "SG250HX",
       "manufacturer": "阳光电源",
-      "protocol": "http_api",
+      "protocol": "sungrow_api",
       "collect_interval": 900,
       "connection_params": {
         "api_base": "https://gateway.isolarcloud.com",
@@ -249,7 +249,7 @@
       "rated_power": 290,
       "model": "SG250HX",
       "manufacturer": "阳光电源",
-      "protocol": "http_api",
+      "protocol": "sungrow_api",
       "collect_interval": 900,
       "connection_params": {
         "api_base": "https://gateway.isolarcloud.com",