diff --git a/api/s15_energy.py b/api/s15_energy.py
index aad2fd6..231a898 100644
--- a/api/s15_energy.py
+++ b/api/s15_energy.py
@@ -170,7 +170,8 @@ def inp_out_energy(name: str) -> list[str]:
     for obj in objs:
         key = obj['key']
         value = obj['value']
-        lines.append(f'{key} {value}')
+        if value.strip() != '':
+            lines.append(f'{key} {value}')
 
     objs = read_all(name, f"select * from energy_pump_price")
     for obj in objs: