diff --git a/infrastructure/solar/google_solar_api_client.py b/infrastructure/solar/google_solar_api_client.py
index 307bf46b..fd3c39cf 100644
--- a/infrastructure/solar/google_solar_api_client.py
+++ b/infrastructure/solar/google_solar_api_client.py
@@ -39,6 +39,24 @@ class GoogleSolarApiClient:
         self._min_request_interval_seconds = min_request_interval_seconds
         self._last_request_monotonic: Optional[float] = None
 
+    def _await_rate_limit(self) -> None:
+        """Block until at least ``min_request_interval_seconds`` has elapsed since
+        this instance's previous call, so the container never exceeds its share of
+        the fleet's 600 QPM Solar budget. A no-op when the interval is 0 (the
+        default / interactive path). The call's own latency counts toward the gap
+        (we sleep only the *remainder*), so we don't double-pay the request time."""
+        if self._min_request_interval_seconds <= 0:
+            return
+        now = time.monotonic()
+        if self._last_request_monotonic is not None:
+            wait = self._min_request_interval_seconds - (
+                now - self._last_request_monotonic
+            )
+            if wait > 0:
+                time.sleep(wait)
+                now = time.monotonic()
+        self._last_request_monotonic = now
+
     @staticmethod
     def _parse_retry_after(response: requests.Response) -> Optional[float]:
         header = response.headers.get("Retry-After")
@@ -55,6 +73,7 @@ class GoogleSolarApiClient:
         latitude: float,
         required_quality: Literal["HIGH", "MEDIUM", "LOW"] = "MEDIUM",
     ) -> dict[str, Any]:
+        self._await_rate_limit()
         insights_url = f"{self.base_url}/buildingInsights:findClosest"
         params: dict[str, str] = {
             "location.latitude": f"{latitude:.5f}",