diff --git a/app/Commands/EcowittExportCommand.php b/app/Commands/EcowittExportCommand.php
index 609ffd0..2122106 100644
--- a/app/Commands/EcowittExportCommand.php
+++ b/app/Commands/EcowittExportCommand.php
@@ -124,6 +124,11 @@ class EcowittExportCommand extends Command
                 // uv
                 $this->debug('collecting: uv');
                 $uvi = $this->getData($ecowitt, 'list.so_uv.list.uv');
+                
+                //replace empty values with 0
+                foreach ($uvi as $key => $value) {
+					if(empty($value)) $uvi[$key] = "0";
+				}
 
                 // rainrate in mm/hr b
                 $this->debug('collecting: rainrate in mm/hr b');