diff --git a/Business/PLDProcessor.cs b/Business/PLDProcessor.cs
index 2292f64..e337c90 100644
--- a/Business/PLDProcessor.cs
+++ b/Business/PLDProcessor.cs
@@ -26,7 +26,7 @@ public class PLDProcessor
                 "yyyy-MM-dd'T'HH:mm:ss'-03:00'", null
             );
 
-            double dia = data.ToOADate() - data.ToOADate() % 1;
+            DateTime dia = data.Date;
             int hora = data.Hour + 1;
             string mes = data.ToString("yyMM");
             int diaSemana = (int)data.DayOfWeek == 0 ? 7 : (int)data.DayOfWeek;
@@ -35,7 +35,7 @@ public class PLDProcessor
             {
                 string submercado = valorNode.SelectSingleNode("bo:submercado//bo:nome", nsmgr).InnerText;
                 double valor = double.Parse(valorNode.SelectSingleNode("bo:valor//bo:valor", nsmgr).InnerText, new CultureInfo("en-US"));
-                pldList.Add(new PLDModel(data, hora, submercado, valor, mes, diaSemana));
+                pldList.Add(new PLDModel(dia, hora, submercado, valor, mes, diaSemana));
             }
         }
 
diff --git a/Data/AccessRepository.cs b/Data/AccessRepository.cs
index 1f3b6f0..f7ed105 100644
--- a/Data/AccessRepository.cs
+++ b/Data/AccessRepository.cs
@@ -19,11 +19,16 @@ public class AccessRepository : IDataRepository
         return cmd.ExecuteScalar() is DateTime data ? data.AddDays(1) : new DateTime(2022, 01, 01);
     }
 
-    public void SalvarPLDs(List<PLDModel> plds)
+    public void SalvarPLDs(List<PLDModel> plds, DateTime ultimaData)
     {
         using var conn = new OleDbConnection(_connectionString);
         conn.Open();
-        foreach (var pld in plds)
+
+        // Filtrar apenas os PLDs mais recentes
+        var novosPLDs = plds.FindAll(pld => pld.Dia >= ultimaData);
+        if (novosPLDs.Count == 0) return; // Nenhum dado novo, então sair da função
+
+        foreach (var pld in novosPLDs)
         {
             string query = "INSERT INTO PLD_comp (Data, Hora, Submercado, Valor, Mes_ref, Dia_da_semana) " +
                            "VALUES (@Data, @Hora, @Submercado, @Valor, @MesRef, @DiaSemana)";
diff --git a/Data/IDataRepository.cs b/Data/IDataRepository.cs
index 76e2bfe..f9a291f 100644
--- a/Data/IDataRepository.cs
+++ b/Data/IDataRepository.cs
@@ -3,5 +3,5 @@
 public interface IDataRepository
 {
     DateTime ObterDataInicial();
-    void SalvarPLDs(List<PLDModel> plds);
+    void SalvarPLDs(List<PLDModel> plds, DateTime ultimaData);
 }
diff --git a/Data/PostgresRepository.cs b/Data/PostgresRepository.cs
index a8d126a..58f66c3 100644
--- a/Data/PostgresRepository.cs
+++ b/Data/PostgresRepository.cs
@@ -28,11 +28,15 @@ using PI_Assync_PLD.Models;
                 : DateTime.Now.AddYears(-2);
         }
 
-        public void SalvarPLDs(List<PLDModel> plds)
+        public void SalvarPLDs(List<PLDModel> plds, DateTime ultimaData)
         {
             using var conn = new NpgsqlConnection(_connectionString);
             conn.Open();
 
+            // Filtrar apenas os PLDs mais recentes
+            var novosPLDs = plds.FindAll(pld => pld.Dia >= ultimaData);
+            if (novosPLDs.Count == 0) return; // Nenhum dado novo, então sair da função
+
             using var transaction = conn.BeginTransaction();
 
             string query = "INSERT INTO pld (dia_num, hora, submercado, valor, mes_ref, dia_da_semana) " +
@@ -40,10 +44,10 @@ using PI_Assync_PLD.Models;
 
             using var cmd = new NpgsqlCommand(query, conn, transaction);
 
-            foreach (var pld in plds)
+            foreach (var pld in novosPLDs)
             {
                 cmd.Parameters.Clear();
-                cmd.Parameters.AddWithValue("@Dia", pld.Dia);
+                cmd.Parameters.AddWithValue("@Dia", pld.Dia.ToOADate());
                 cmd.Parameters.AddWithValue("@Hora", pld.Hora);
                 cmd.Parameters.AddWithValue("@Submercado", pld.Submercado);
                 cmd.Parameters.AddWithValue("@Valor", pld.Valor);
diff --git a/Services/PLDService.cs b/Services/PLDService.cs
index 2d6c78f..af152de 100644
--- a/Services/PLDService.cs
+++ b/Services/PLDService.cs
@@ -18,13 +18,11 @@ public class PLDService
 
     public async Task SincronizarPLDsAsync()
     {
-        List<DateTime> datasIniciais = _repositories.ConvertAll(repo => repo.ObterDataInicial());
-        DateTime dataInicial = DateTime.MinValue;
-        foreach (var data in datasIniciais)
-        {
-            if (data > dataInicial) dataInicial = data;
-        }
-        DateTime dataFinal = DateTime.Now.AddDays(1);
+        Dictionary<IDataRepository, DateTime> datasIniciais = _repositories
+            .ToDictionary(repo => repo, repo => repo.ObterDataInicial());
+
+        DateTime dataFinal = DateTime.Now.Date.AddDays(1);
+        DateTime dataInicial = datasIniciais.Values.Min();
 
         // Criar um timer que reseta a cada segundo 00
         _ = Task.Run(() => ResetarLimitePorMinuto());
@@ -43,7 +41,14 @@ public class PLDService
         // Atualiza ambos os bancos apenas se houver novos dados
         if (plds.Count > 0)
         {
-            Parallel.ForEach(_repositories, repo => repo.SalvarPLDs(plds));
+            // Para cada repositório, passar a data inicial correta
+            Parallel.ForEach(datasIniciais, kvp =>
+            {
+                var repo = kvp.Key;
+                var ultimaData = kvp.Value;
+                repo.SalvarPLDs(plds, ultimaData);
+            });
+
             Console.WriteLine("PLDs salvos com sucesso.");
         }
     }
@@ -66,10 +71,4 @@ public class PLDService
                           .Replace("DATA_FIM", fim.ToString("yyyy-MM-ddT00:00:00"))
                           .Replace("PAG_NUM", "1");
     }
-
-    private List<PLDModel> ProcessarXML(string xml)
-    {
-        // Simulação de parser XML (substituir pela lógica real)
-        return new List<PLDModel> { new PLDModel(DateTime.Now, 1, "Sul", 123.45, "2403", 3) };
-    }
 }