diff --git a/DeltaVBaR/Data/Scripts/SKO-Nanobot-BuildAndRepair-System/NanobotBuildAndRepairSystemBlock.cs b/DeltaVBaR/Data/Scripts/SKO-Nanobot-BuildAndRepair-System/NanobotBuildAndRepairSystemBlock.cs
index f795af1..90fd40f 100644
--- a/DeltaVBaR/Data/Scripts/SKO-Nanobot-BuildAndRepair-System/NanobotBuildAndRepairSystemBlock.cs
+++ b/DeltaVBaR/Data/Scripts/SKO-Nanobot-BuildAndRepair-System/NanobotBuildAndRepairSystemBlock.cs
@@ -461,6 +461,19 @@ private void UpdateBeforeSimulation10_100(bool fast)
                         CleanupFriendlyDamage();
                     }
 
+                    // Check if other BaR is powered in grid group
+                    if (_Welder.Enabled && IsOtherBaRPoweredInGridGroup())
+                    {
+                        _Welder.Enabled = false;
+                        NotifyPlayersInRange(
+                            "Only one Build And Repair System can be powered per grid group",
+                            _Welder.GetPosition(),
+                            100,
+                            "Red"
+                        );
+                        return;
+                    }
+
                     ServerTryWeldingGrindingCollecting();
 
                     if (!fast)
@@ -512,6 +525,49 @@ private void UpdateBeforeSimulation10_100(bool fast)
             }
         }
 
+        private bool IsOtherBaRPoweredInGridGroup()
+        {
+            var grid = _Welder.CubeGrid;
+            var groupedGrids = new HashSet<IMyCubeGrid>();
+            MyAPIGateway.GridGroups.GetGroup(grid, GridLinkTypeEnum.Physical, groupedGrids);
+
+            foreach (var connectedGrid in groupedGrids)
+            {
+                var blocks = new List<IMySlimBlock>();
+                connectedGrid.GetBlocks(blocks);
+
+                foreach (var block in blocks)
+                {
+                    var bar = block.FatBlock as IMyShipWelder;
+                    if (bar != null && bar.BlockDefinition.SubtypeName.Contains("NanobotBuildAndRepairSystem"))
+                    {
+                        var otherSystem = bar.GameLogic.GetAs<NanobotBuildAndRepairSystemBlock>();
+                        if (otherSystem != null && otherSystem != this && otherSystem.Welder.IsWorking)
+                        {
+                            return true;
+                        }
+                    }
+                }
+            }
+
+            return false;
+        }
+
+        private void NotifyPlayersInRange(string message, Vector3D position, double radius, string color = "White")
+        {
+            var sphere = new BoundingSphereD(position, radius);
+            var entities = MyAPIGateway.Entities.GetEntitiesInSphere(ref sphere);
+
+            foreach (var entity in entities)
+            {
+                var character = entity as IMyCharacter;
+                if (character != null && character.IsPlayer)
+                {
+                    MyAPIGateway.Utilities.ShowNotification(message, 2000, color);
+                }
+            }
+        }
+
         /// <summary>
         /// Try to weld/grind/collect the possible targets
         /// </summary>