diff --git a/src/components/simulator/Simulator.jsx b/src/components/simulator/Simulator.jsx
index d873049f..283bdbc8 100644
--- a/src/components/simulator/Simulator.jsx
+++ b/src/components/simulator/Simulator.jsx
@@ -226,7 +226,7 @@ export default function Simulator() {
               {/* 연간예측발전량 */}
               <div className="estimate-box">
                 <div className="estimate-tit">{getMessage('simulator.title.sub4')}</div>
-                <div className="estimate-name">{chartData[chartData.length - 1]}</div>
+                <div className="estimate-name">{chartData[chartData.length - 1] != null ? `${chartData[chartData.length - 1]} kWh` : ''}</div>
               </div>
             </div>
             <div className="estimate-list-wrap">