diff --git a/enphase.py b/enphase.py
index f859847..e5a4eef 100644
--- a/enphase.py
+++ b/enphase.py
@@ -91,6 +91,9 @@ def thread_production():
 		e = time.time()
 		if s > e:
 			time.sleep(s - time.time())
+		else:
+			# catch up s to e:
+			s += ((e - s) // 10) * 10
 
 def thread_inventory():
 	global doexit