diff --git a/include/PowerMeterHttpJson.h b/include/PowerMeterHttpJson.h
index 8810ca05..afccb05a 100644
--- a/include/PowerMeterHttpJson.h
+++ b/include/PowerMeterHttpJson.h
@@ -14,6 +14,9 @@ using Unit_t = PowerMeterHttpJsonValue::Unit;
 
 class PowerMeterHttpJson : public PowerMeterProvider {
 public:
+    explicit PowerMeterHttpJson(PowerMeterHttpJsonConfig const& cfg)
+        : _cfg(cfg) { }
+
     bool init() final;
     void loop() final;
     float getPowerTotal() const final;
@@ -24,6 +27,8 @@ public:
     poll_result_t poll();
 
 private:
+    PowerMeterHttpJsonConfig const _cfg;
+
     uint32_t _lastPoll;
 
     power_values_t _powerValues;
diff --git a/include/PowerMeterHttpSml.h b/include/PowerMeterHttpSml.h
index b351674b..30444b6a 100644
--- a/include/PowerMeterHttpSml.h
+++ b/include/PowerMeterHttpSml.h
@@ -5,10 +5,14 @@
 #include <stdint.h>
 #include <Arduino.h>
 #include "HttpGetter.h"
+#include "Configuration.h"
 #include "PowerMeterSml.h"
 
 class PowerMeterHttpSml : public PowerMeterSml {
 public:
+    explicit PowerMeterHttpSml(PowerMeterHttpSmlConfig const& cfg)
+        : _cfg(cfg) { }
+
     bool init() final;
     void loop() final;
 
@@ -17,6 +21,8 @@ public:
     String poll();
 
 private:
+    PowerMeterHttpSmlConfig const _cfg;
+
     uint32_t _lastPoll = 0;
 
     std::unique_ptr<HttpGetter> _upHttpGetter;
diff --git a/include/PowerMeterMqtt.h b/include/PowerMeterMqtt.h
index 8880f481..39257187 100644
--- a/include/PowerMeterMqtt.h
+++ b/include/PowerMeterMqtt.h
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 #pragma once
 
+#include "Configuration.h"
 #include "PowerMeterProvider.h"
 #include <espMqttClient.h>
 #include <vector>
@@ -8,6 +9,9 @@
 
 class PowerMeterMqtt : public PowerMeterProvider {
 public:
+    explicit PowerMeterMqtt(PowerMeterMqttConfig const& cfg)
+        : _cfg(cfg) { }
+
     ~PowerMeterMqtt();
 
     bool init() final;
@@ -21,6 +25,8 @@ private:
             uint8_t const* payload, size_t len, size_t index,
             size_t total, float* targetVariable);
 
+    PowerMeterMqttConfig const _cfg;
+
     float _powerValueOne = 0;
     float _powerValueTwo = 0;
     float _powerValueThree = 0;
diff --git a/include/PowerMeterSerialSdm.h b/include/PowerMeterSerialSdm.h
index ff33bebd..e98b286e 100644
--- a/include/PowerMeterSerialSdm.h
+++ b/include/PowerMeterSerialSdm.h
@@ -2,11 +2,21 @@
 #pragma once
 
 #include <mutex>
+#include "Configuration.h"
 #include "PowerMeterProvider.h"
 #include "SDM.h"
 
 class PowerMeterSerialSdm : public PowerMeterProvider {
 public:
+    enum class Phases {
+        One,
+        Three
+    };
+
+    PowerMeterSerialSdm(Phases phases, PowerMeterSerialSdmConfig const& cfg)
+        : _phases(phases)
+        , _cfg(cfg) { }
+
     ~PowerMeterSerialSdm();
 
     bool init() final;
@@ -15,6 +25,9 @@ public:
     void doMqttPublish() const final;
 
 private:
+    Phases _phases;
+    PowerMeterSerialSdmConfig const _cfg;
+
     uint32_t _lastPoll;
 
     float _phase1Power = 0.0;
diff --git a/src/PowerMeter.cpp b/src/PowerMeter.cpp
index 47261318..3787dfe7 100644
--- a/src/PowerMeter.cpp
+++ b/src/PowerMeter.cpp
@@ -26,20 +26,24 @@ void PowerMeterClass::updateSettings()
 
     if (_upProvider) { _upProvider.reset(); }
 
-    auto const& config = Configuration.get();
+    auto const& pmcfg = Configuration.get().PowerMeter;
 
-    if (!config.PowerMeter.Enabled) { return; }
+    if (!pmcfg.Enabled) { return; }
 
-    switch(static_cast<PowerMeterProvider::Type>(config.PowerMeter.Source)) {
+    switch(static_cast<PowerMeterProvider::Type>(pmcfg.Source)) {
         case PowerMeterProvider::Type::MQTT:
-            _upProvider = std::make_unique<PowerMeterMqtt>();
+            _upProvider = std::make_unique<PowerMeterMqtt>(pmcfg.Mqtt);
             break;
         case PowerMeterProvider::Type::SDM1PH:
+            _upProvider = std::make_unique<PowerMeterSerialSdm>(
+                    PowerMeterSerialSdm::Phases::One, pmcfg.SerialSdm);
+            break;
         case PowerMeterProvider::Type::SDM3PH:
-            _upProvider = std::make_unique<PowerMeterSerialSdm>();
+            _upProvider = std::make_unique<PowerMeterSerialSdm>(
+                    PowerMeterSerialSdm::Phases::Three, pmcfg.SerialSdm);
             break;
         case PowerMeterProvider::Type::HTTP_JSON:
-            _upProvider = std::make_unique<PowerMeterHttpJson>();
+            _upProvider = std::make_unique<PowerMeterHttpJson>(pmcfg.HttpJson);
             break;
         case PowerMeterProvider::Type::SERIAL_SML:
             _upProvider = std::make_unique<PowerMeterSerialSml>();
@@ -48,7 +52,7 @@ void PowerMeterClass::updateSettings()
             _upProvider = std::make_unique<PowerMeterUdpSmaHomeManager>();
             break;
         case PowerMeterProvider::Type::HTTP_SML:
-            _upProvider = std::make_unique<PowerMeterHttpSml>();
+            _upProvider = std::make_unique<PowerMeterHttpSml>(pmcfg.HttpSml);
             break;
     }
 
diff --git a/src/PowerMeterHttpJson.cpp b/src/PowerMeterHttpJson.cpp
index 621670d3..822f2eb2 100644
--- a/src/PowerMeterHttpJson.cpp
+++ b/src/PowerMeterHttpJson.cpp
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 #include "Utils.h"
-#include "Configuration.h"
 #include "PowerMeterHttpJson.h"
 #include "MessageOutput.h"
 #include <WiFiClientSecure.h>
@@ -11,14 +10,12 @@
 
 bool PowerMeterHttpJson::init()
 {
-    auto const& config = Configuration.get();
-
     for (uint8_t i = 0; i < POWERMETER_HTTP_JSON_MAX_VALUES; i++) {
-        auto const& valueConfig = config.PowerMeter.HttpJson.Values[i];
+        auto const& valueConfig = _cfg.Values[i];
 
         _httpGetters[i] = nullptr;
 
-        if (i == 0 || (config.PowerMeter.HttpJson.IndividualRequests && valueConfig.Enabled)) {
+        if (i == 0 || (_cfg.IndividualRequests && valueConfig.Enabled)) {
             _httpGetters[i] = std::make_unique<HttpGetter>(valueConfig.HttpRequest);
         }
 
@@ -40,8 +37,7 @@ bool PowerMeterHttpJson::init()
 
 void PowerMeterHttpJson::loop()
 {
-    auto const& config = Configuration.get();
-    if ((millis() - _lastPoll) < (config.PowerMeter.HttpJson.PollingInterval * 1000)) {
+    if ((millis() - _lastPoll) < (_cfg.PollingInterval * 1000)) {
         return;
     }
 
@@ -68,7 +64,7 @@ PowerMeterHttpJson::poll_result_t PowerMeterHttpJson::poll()
     };
 
     for (uint8_t i = 0; i < POWERMETER_HTTP_JSON_MAX_VALUES; i++) {
-        auto const& cfg = Configuration.get().PowerMeter.HttpJson.Values[i];
+        auto const& cfg = _cfg.Values[i];
 
         if (!cfg.Enabled) {
             cache[i] = 0.0;
diff --git a/src/PowerMeterHttpSml.cpp b/src/PowerMeterHttpSml.cpp
index e9a38389..7d64f442 100644
--- a/src/PowerMeterHttpSml.cpp
+++ b/src/PowerMeterHttpSml.cpp
@@ -1,5 +1,4 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-#include "Configuration.h"
 #include "PowerMeterHttpSml.h"
 #include "MessageOutput.h"
 #include <WiFiClientSecure.h>
@@ -8,9 +7,7 @@
 
 bool PowerMeterHttpSml::init()
 {
-    auto const& config = Configuration.get();
-
-    _upHttpGetter = std::make_unique<HttpGetter>(config.PowerMeter.HttpSml.HttpRequest);
+    _upHttpGetter = std::make_unique<HttpGetter>(_cfg.HttpRequest);
 
     if (_upHttpGetter->init()) { return true; }
 
@@ -24,8 +21,7 @@ bool PowerMeterHttpSml::init()
 
 void PowerMeterHttpSml::loop()
 {
-    auto const& config = Configuration.get();
-    if ((millis() - _lastPoll) < (config.PowerMeter.HttpSml.PollingInterval * 1000)) {
+    if ((millis() - _lastPoll) < (_cfg.PollingInterval * 1000)) {
         return;
     }
 
diff --git a/src/PowerMeterMqtt.cpp b/src/PowerMeterMqtt.cpp
index 9a4654b7..1ce9fbb0 100644
--- a/src/PowerMeterMqtt.cpp
+++ b/src/PowerMeterMqtt.cpp
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 #include "PowerMeterMqtt.h"
-#include "Configuration.h"
 #include "MqttSettings.h"
 #include "MessageOutput.h"
 
@@ -18,10 +17,9 @@ bool PowerMeterMqtt::init()
         _mqttSubscriptions.push_back(topic);
     };
 
-    auto const& config = Configuration.get();
-    subscribe(config.PowerMeter.Mqtt.Values[0].Topic, &_powerValueOne);
-    subscribe(config.PowerMeter.Mqtt.Values[1].Topic, &_powerValueTwo);
-    subscribe(config.PowerMeter.Mqtt.Values[2].Topic, &_powerValueThree);
+    subscribe(_cfg.Values[0].Topic, &_powerValueOne);
+    subscribe(_cfg.Values[1].Topic, &_powerValueTwo);
+    subscribe(_cfg.Values[2].Topic, &_powerValueThree);
 
     return _mqttSubscriptions.size() > 0;
 }
diff --git a/src/PowerMeterSerialSdm.cpp b/src/PowerMeterSerialSdm.cpp
index a425f986..f5552aaa 100644
--- a/src/PowerMeterSerialSdm.cpp
+++ b/src/PowerMeterSerialSdm.cpp
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 #include "PowerMeterSerialSdm.h"
-#include "Configuration.h"
 #include "PinMapping.h"
 #include "MessageOutput.h"
 #include "SerialPortManager.h"
@@ -61,13 +60,11 @@ void PowerMeterSerialSdm::loop()
 {
     if (!_upSdm) { return; }
 
-    auto const& config = Configuration.get();
-
-    if ((millis() - _lastPoll) < (config.PowerMeter.SerialSdm.PollingInterval * 1000)) {
+    if ((millis() - _lastPoll) < (_cfg.PollingInterval * 1000)) {
         return;
     }
 
-    uint8_t addr = config.PowerMeter.SerialSdm.Address;
+    uint8_t addr = _cfg.Address;
 
     // reading takes a "very long" time as each readVal() is a synchronous
     // exchange of serial messages. cache the values and write later to
@@ -81,7 +78,7 @@ void PowerMeterSerialSdm::loop()
     float energyImport = _upSdm->readVal(SDM_IMPORT_ACTIVE_ENERGY, addr);
     float energyExport = _upSdm->readVal(SDM_EXPORT_ACTIVE_ENERGY, addr);
 
-    if (static_cast<PowerMeterProvider::Type>(config.PowerMeter.Source) == PowerMeterProvider::Type::SDM3PH) {
+    if (_phases == Phases::Three) {
         phase2Power = _upSdm->readVal(SDM_PHASE_2_POWER, addr);
         phase3Power = _upSdm->readVal(SDM_PHASE_3_POWER, addr);
         phase2Voltage = _upSdm->readVal(SDM_PHASE_2_VOLTAGE, addr);
diff --git a/src/WebApi_powermeter.cpp b/src/WebApi_powermeter.cpp
index 0fea84ed..b0e2bbcd 100644
--- a/src/WebApi_powermeter.cpp
+++ b/src/WebApi_powermeter.cpp
@@ -188,25 +188,19 @@ void WebApiPowerMeterClass::onTestHttpJsonRequest(AsyncWebServerRequest* request
 
     char response[256];
 
-    auto powerMeterConfig = std::make_unique<CONFIG_T::PowerMeterConfig>();
-    JsonObject httpJson = root["http_json"];
-    powerMeterConfig->HttpJson.IndividualRequests = httpJson["individual_requests"].as<bool>();
-    powerMeterConfig->VerboseLogging = true;
-    Configuration.deserializePowerMeterHttpJsonConfig(httpJson,
-            powerMeterConfig->HttpJson);
-    auto backup = std::make_unique<CONFIG_T::PowerMeterConfig>(Configuration.get().PowerMeter);
-    Configuration.get().PowerMeter = *powerMeterConfig;
-    auto upMeter = std::make_unique<PowerMeterHttpJson>();
+    auto powerMeterConfig = std::make_unique<PowerMeterHttpJsonConfig>();
+    Configuration.deserializePowerMeterHttpJsonConfig(root["http_json"].as<JsonObject>(),
+            *powerMeterConfig);
+    auto upMeter = std::make_unique<PowerMeterHttpJson>(*powerMeterConfig);
     upMeter->init();
     auto res = upMeter->poll();
-    Configuration.get().PowerMeter = *backup;
     using values_t = PowerMeterHttpJson::power_values_t;
     if (std::holds_alternative<values_t>(res)) {
         retMsg["type"] = "success";
         auto vals = std::get<values_t>(res);
         auto pos = snprintf(response, sizeof(response), "Result: %5.2fW", vals[0]);
-        for (size_t i = 1; i < POWERMETER_HTTP_JSON_MAX_VALUES; ++i) {
-            if (!powerMeterConfig->HttpJson.Values[i].Enabled) { continue; }
+        for (size_t i = 1; i < vals.size(); ++i) {
+            if (!powerMeterConfig->Values[i].Enabled) { continue; }
             pos += snprintf(response + pos, sizeof(response) - pos, ", %5.2fW", vals[i]);
         }
         snprintf(response + pos, sizeof(response) - pos, ", Total: %5.2f", upMeter->getPowerTotal());
@@ -235,16 +229,12 @@ void WebApiPowerMeterClass::onTestHttpSmlRequest(AsyncWebServerRequest* request)
 
     char response[256];
 
-    auto powerMeterConfig = std::make_unique<CONFIG_T::PowerMeterConfig>();
+    auto powerMeterConfig = std::make_unique<PowerMeterHttpSmlConfig>();
     Configuration.deserializePowerMeterHttpSmlConfig(root["http_sml"].as<JsonObject>(),
-            powerMeterConfig->HttpSml);
-    powerMeterConfig->VerboseLogging = true;
-    auto backup = std::make_unique<CONFIG_T::PowerMeterConfig>(Configuration.get().PowerMeter);
-    Configuration.get().PowerMeter = *powerMeterConfig;
-    auto upMeter = std::make_unique<PowerMeterHttpSml>();
+            *powerMeterConfig);
+    auto upMeter = std::make_unique<PowerMeterHttpSml>(*powerMeterConfig);
     upMeter->init();
     auto res = upMeter->poll();
-    Configuration.get().PowerMeter = *backup;
     if (res.isEmpty()) {
         retMsg["type"] = "success";
         snprintf(response, sizeof(response), "Result: %5.2fW", upMeter->getPowerTotal());