diff --git a/internal/serve/api.go b/internal/serve/api.go
index e584e41..f9e8453 100644
--- a/internal/serve/api.go
+++ b/internal/serve/api.go
@@ -17,7 +17,7 @@ func getRouteFunc[P any, O any](path string, bindFunc func(echo.Context) (P, err
 
 			o, err := outputFunc(s.rg, p)
 			switch err.(type) {
-			case redgiant.SungrowDisconnectedError:
+			case *redgiant.SungrowDisconnectedError:
 				panic(err.Error())
 			case error:
 				return err
diff --git a/sungrow.go b/sungrow.go
index 883c3a7..27add5a 100644
--- a/sungrow.go
+++ b/sungrow.go
@@ -263,7 +263,7 @@ func (s *Sungrow) Send(service string, params map[string]any, v any) error {
 	for {
 		resp, err := s.send(service, m)
 		switch err.(type) {
-		case SungrowDisconnectedError:
+		case *SungrowDisconnectedError:
 			if err := s.reconnect(); err != nil {
 				return err
 			}