diff --git a/power_grid_model_c/power_grid_model/include/power_grid_model/main_model.hpp b/power_grid_model_c/power_grid_model/include/power_grid_model/main_model.hpp
index f47b871ce..c35da97e2 100644
--- a/power_grid_model_c/power_grid_model/include/power_grid_model/main_model.hpp
+++ b/power_grid_model_c/power_grid_model/include/power_grid_model/main_model.hpp
@@ -108,10 +108,7 @@ class MainModelImpl<ExtraRetrievableTypes<ExtraRetrievableType...>, ComponentLis
     explicit MainModelImpl(double system_frequency, ConstDataset const& input_data, Idx pos = 0)
         : system_frequency_{system_frequency}, meta_data_{&input_data.meta_data()} {
         assert(input_data.get_description().dataset->name == std::string_view("input"));
-        auto const add_func = [this, pos, &input_data]<typename CT>() {
-            this->add_component<CT>(input_data.get_buffer_span<meta_data::input_getter_s, CT>(pos));
-        };
-        run_functor_with_all_types_return_void(add_func);
+        add_components(input_data, pos);
         set_construction_complete();
     }
 
@@ -158,6 +155,13 @@ class MainModelImpl<ExtraRetrievableTypes<ExtraRetrievableType...>, ComponentLis
         main_core::add_component<CompType>(state_, begin, end, system_frequency_);
     }
 
+    void add_components(ConstDataset const& input_data, Idx pos = 0) {
+        auto const add_func = [this, pos, &input_data]<typename CT>() {
+            this->add_component<CT>(input_data.get_buffer_span<meta_data::input_getter_s, CT>(pos));
+        };
+        run_functor_with_all_types_return_void(add_func);
+    }
+
     // template to update components
     // using forward interators
     // different selection based on component type
diff --git a/tests/power_grid_model_static/include/power_grid_model_static/main_model_wrapper.hpp b/tests/power_grid_model_static/include/power_grid_model_static/main_model_wrapper.hpp
index 3041fc38e..2566817e1 100644
--- a/tests/power_grid_model_static/include/power_grid_model_static/main_model_wrapper.hpp
+++ b/tests/power_grid_model_static/include/power_grid_model_static/main_model_wrapper.hpp
@@ -45,7 +45,12 @@ class MainModelWrapper {
     template <class CompType> void add_component(std::vector<typename CompType::InputType> const& components) {
         add_component<CompType>(std::span<typename CompType::InputType const>{components});
     }
-    template <class CompType> void add_component(std::span<typename CompType::InputType const> components);
+    template <class CompType> void add_component(std::span<typename CompType::InputType const> components) {
+        ConstDataset dataset{false, 1, "input", meta_data::meta_data_gen::meta_data};
+        dataset.add_buffer(CompType::name, components.size(), components.size(), nullptr, components.data());
+        add_components(dataset);
+    }
+
     template <cache_type_c CacheType> void update_component(ConstDataset const& update_data, Idx pos = 0);
 
     template <symmetry_tag sym> MathOutput<std::vector<SolverOutput<sym>>> calculate_power_flow(Options const& options);
@@ -70,6 +75,8 @@ class MainModelWrapper {
 
   private:
     std::unique_ptr<Impl> impl_;
+
+    void add_components(ConstDataset const& input_data, Idx pos = 0);
 };
 
 } // namespace power_grid_model::pgm_static
diff --git a/tests/power_grid_model_static/src/main_model_wrapper.cpp b/tests/power_grid_model_static/src/main_model_wrapper.cpp
index 12a7b6e1e..f731eddd1 100644
--- a/tests/power_grid_model_static/src/main_model_wrapper.cpp
+++ b/tests/power_grid_model_static/src/main_model_wrapper.cpp
@@ -61,38 +61,11 @@ void MainModelWrapper::restore_components(ConstDataset const& update_data) {
     impl_->restore_components(impl_->get_sequence_idx_map(update_data));
 }
 
-template <class CompType>
-void MainModelWrapper::add_component(std::span<typename CompType::InputType const> components) {
+void MainModelWrapper::add_components(ConstDataset const& input_data, Idx pos) {
     assert(impl_ != nullptr);
-    impl_->add_component<CompType>(components);
+    impl_->add_components(input_data, pos);
 }
 
-template void MainModelWrapper::add_component<Node>(std::span<typename Node::InputType const> components);
-template void MainModelWrapper::add_component<Line>(std::span<typename Line::InputType const> components);
-template void MainModelWrapper::add_component<Link>(std::span<typename Link::InputType const> components);
-template void MainModelWrapper::add_component<Transformer>(std::span<typename Transformer::InputType const> components);
-template void MainModelWrapper::add_component<ThreeWindingTransformer>(
-    std::span<typename ThreeWindingTransformer::InputType const> components);
-template void MainModelWrapper::add_component<Shunt>(std::span<typename Shunt::InputType const> components);
-template void MainModelWrapper::add_component<Source>(std::span<typename Source::InputType const> components);
-template void
-MainModelWrapper::add_component<SymGenerator>(std::span<typename SymGenerator::InputType const> components);
-template void
-MainModelWrapper::add_component<AsymGenerator>(std::span<typename AsymGenerator::InputType const> components);
-template void MainModelWrapper::add_component<SymLoad>(std::span<typename SymLoad::InputType const> components);
-template void MainModelWrapper::add_component<AsymLoad>(std::span<typename AsymLoad::InputType const> components);
-template void
-MainModelWrapper::add_component<SymPowerSensor>(std::span<typename SymPowerSensor::InputType const> components);
-template void
-MainModelWrapper::add_component<AsymPowerSensor>(std::span<typename AsymPowerSensor::InputType const> components);
-template void
-MainModelWrapper::add_component<SymVoltageSensor>(std::span<typename SymVoltageSensor::InputType const> components);
-template void
-MainModelWrapper::add_component<AsymVoltageSensor>(std::span<typename AsymVoltageSensor::InputType const> components);
-template void MainModelWrapper::add_component<Fault>(std::span<typename Fault::InputType const> components);
-template void MainModelWrapper::add_component<TransformerTapRegulator>(
-    std::span<typename TransformerTapRegulator::InputType const> components);
-
 template <cache_type_c CacheType> void MainModelWrapper::update_component(ConstDataset const& update_data, Idx pos) {
     assert(impl_ != nullptr);
     impl_->update_component<CacheType>(update_data, pos);