diff --git a/extensions/openpower-pels/paths.cpp b/extensions/openpower-pels/paths.cpp
index a9e865c..14e5d71 100644
--- a/extensions/openpower-pels/paths.cpp
+++ b/extensions/openpower-pels/paths.cpp
@@ -25,6 +25,8 @@
 {
 
 namespace fs = std::filesystem;
+static constexpr size_t defaultRepoSize = 20 * 1024 * 1024;
+static constexpr size_t defaultMaxNumPELs = 3000;
 
 fs::path getPELIDFile()
 {
@@ -45,5 +47,19 @@
     return std::filesystem::path{"/usr/share/phosphor-logging/pels"};
 }
 
+size_t getPELRepoSize()
+{
+    // For now, always use 20MB, revisit in the future if different
+    // systems need different values so that we only put PEL
+    // content into configure.ac when absolutely necessary.
+    return defaultRepoSize;
+}
+
+size_t getMaxNumPELs()
+{
+    // Hardcode using the same reasoning as the repo size field.
+    return defaultMaxNumPELs;
+}
+
 } // namespace pels
 } // namespace openpower
diff --git a/extensions/openpower-pels/paths.hpp b/extensions/openpower-pels/paths.hpp
index 8d7a20f..600073a 100644
--- a/extensions/openpower-pels/paths.hpp
+++ b/extensions/openpower-pels/paths.hpp
@@ -20,5 +20,26 @@
  * @brief Returns the path to the read only data directory
  */
 std::filesystem::path getPELReadOnlyDataPath();
+
+/**
+ * @brief Returns the maximum size in bytes allocated to store PELs.
+ *
+ * This is still in paths.c/hpp even though it doesn't return a path
+ * because this file is easy to override when testing.
+ *
+ * @return size_t The maximum size in bytes to use for storing PELs.
+ */
+size_t getPELRepoSize();
+
+/**
+ * @brief Returns the maximum number of PELs allowed
+ *
+ * This is still in paths.c/hpp even though it doesn't return a path
+ * because this file is easy to override when testing.
+ *
+ * @return size_t The maximum number of PELs to allow in the repository.
+ */
+size_t getMaxNumPELs();
+
 } // namespace pels
 } // namespace openpower
diff --git a/extensions/openpower-pels/repository.cpp b/extensions/openpower-pels/repository.cpp
index 2de3ee9..331b86a 100644
--- a/extensions/openpower-pels/repository.cpp
+++ b/extensions/openpower-pels/repository.cpp
@@ -28,8 +28,10 @@
 using namespace phosphor::logging;
 namespace file_error = sdbusplus::xyz::openbmc_project::Common::File::Error;
 
-Repository::Repository(const std::filesystem::path& basePath) :
-    _logPath(basePath / "logs")
+Repository::Repository(const std::filesystem::path& basePath, size_t repoSize,
+                       size_t maxNumPELs) :
+    _logPath(basePath / "logs"),
+    _maxRepoSize(repoSize), _maxNumPELs(maxNumPELs)
 {
     if (!fs::exists(_logPath))
     {
diff --git a/extensions/openpower-pels/repository.hpp b/extensions/openpower-pels/repository.hpp
index e55808f..2e2f623 100644
--- a/extensions/openpower-pels/repository.hpp
+++ b/extensions/openpower-pels/repository.hpp
@@ -1,5 +1,6 @@
 #pragma once
 #include "bcd_time.hpp"
+#include "paths.hpp"
 #include "pel.hpp"
 
 #include <algorithm>
@@ -118,7 +119,21 @@
      *
      * @param[in] basePath - the base filesystem path for the repository
      */
-    Repository(const std::filesystem::path& basePath);
+    Repository(const std::filesystem::path& basePath) :
+        Repository(basePath, getPELRepoSize(), getMaxNumPELs())
+    {
+    }
+
+    /**
+     * @brief Constructor that takes the repository size
+     *
+     * @param[in] basePath - the base filesystem path for the repository
+     * @param[in] repoSize - The maximum amount of space to use for PELs,
+     *                       in bytes
+     * @param[in] maxNumPELs - The maximum number of PELs to allow
+     */
+    Repository(const std::filesystem::path& basePath, size_t repoSize,
+               size_t maxNumPELs);
 
     /**
      * @brief Adds a PEL to the repository
@@ -370,6 +385,18 @@
      * @brief Subscriptions for deleted PELs.
      */
     std::map<std::string, DeleteCallback> _deleteSubscriptions;
+
+    /**
+     * @brief The maximum amount of space that the PELs in the
+     *        repository can occupy.
+     */
+    const uint64_t _maxRepoSize;
+
+    /**
+     * @brief The maximum number of PELs to allow in the repo
+     *        before pruning.
+     */
+    const size_t _maxNumPELs;
 };
 
 } // namespace pels