diff --git a/packages/helpermodules/update_config.py b/packages/helpermodules/update_config.py
index 0987ef9a05..216465264b 100644
--- a/packages/helpermodules/update_config.py
+++ b/packages/helpermodules/update_config.py
@@ -57,7 +57,7 @@
 
 class UpdateConfig:
 
-    DATASTORE_VERSION = 125
+    DATASTORE_VERSION = 126
 
     valid_topic = [
         "^openWB/bat/config/bat_control_activated$",
@@ -3160,3 +3160,20 @@ def upgrade(topic: str, payload) -> None:
                         return {topic: provider}
         self._loop_all_received_topics(upgrade)
         self._append_datastore_version(125)
+
+    def upgrade_datastore_126(self) -> None:
+        def upgrade(topic: str, payload) -> None:
+            if "openWB/optional/ep/flexible_tariff/provider" == topic:
+                provider = decode_payload(payload)
+                if provider.get("type") == "energycharts":
+                    changed = False
+                    if provider["configuration"].get("net") is None:
+                        provider["configuration"]["net"] = True
+                        changed = True
+                    if provider["configuration"].get("tax") is None:
+                        provider["configuration"]["tax"] = 19
+                        changed = True
+                    if changed:
+                        return {topic: provider}
+        self._loop_all_received_topics(upgrade)
+        self._append_datastore_version(126)
diff --git a/packages/modules/electricity_pricing/flexible_tariffs/energycharts/config.py b/packages/modules/electricity_pricing/flexible_tariffs/energycharts/config.py
index 5f42af86c4..46b120af96 100644
--- a/packages/modules/electricity_pricing/flexible_tariffs/energycharts/config.py
+++ b/packages/modules/electricity_pricing/flexible_tariffs/energycharts/config.py
@@ -5,6 +5,8 @@
 class EnergyChartsTariffConfiguration:
     country: str = "DE-LU"
     surcharge: float = 0
+    net: bool = True
+    tax: float = 19
 
 
 @dataclass
diff --git a/packages/modules/electricity_pricing/flexible_tariffs/energycharts/tariff.py b/packages/modules/electricity_pricing/flexible_tariffs/energycharts/tariff.py
index 5cb3b0ec67..75fa6dbc82 100644
--- a/packages/modules/electricity_pricing/flexible_tariffs/energycharts/tariff.py
+++ b/packages/modules/electricity_pricing/flexible_tariffs/energycharts/tariff.py
@@ -27,7 +27,10 @@ def create_request_url(config: EnergyChartsTariffConfiguration) -> str:
 def parse_response(config: EnergyChartsTariffConfiguration, raw_prices: Dict[str, float]) -> Dict[str, float]:
     prices: Dict[str, float] = {}
     for timestamp, price_per_MWh in zip(raw_prices['unix_seconds'],  raw_prices['price']):
-        prices[str(int(timestamp))] = float(price_per_MWh)/1000000 + config.surcharge
+        formatted_price = float(price_per_MWh)/1000000 + config.surcharge
+        if config.net is False:
+            formatted_price = formatted_price * (1 + config.tax / 100)
+        prices[str(int(timestamp))] = formatted_price
     log.debug("converted prices: %s : %s", len(prices), prices)
     return prices
 
diff --git a/packages/modules/electricity_pricing/flexible_tariffs/energycharts/tariff_test.py b/packages/modules/electricity_pricing/flexible_tariffs/energycharts/tariff_test.py
new file mode 100644
index 0000000000..8bfa863da8
--- /dev/null
+++ b/packages/modules/electricity_pricing/flexible_tariffs/energycharts/tariff_test.py
@@ -0,0 +1,30 @@
+from modules.electricity_pricing.flexible_tariffs.energycharts.config import EnergyChartsTariffConfiguration
+from modules.electricity_pricing.flexible_tariffs.energycharts.tariff import parse_response
+
+
+def test_parse_response_net_prices():
+    # setup
+    config = EnergyChartsTariffConfiguration(net=True, surcharge=0)
+
+    # execution
+    prices = parse_response(config, SAMPLE_DATA)
+
+    # evaluation
+    assert prices == {"1717200000": 0.0001, "1717203600": 0.0002}
+
+
+def test_parse_response_gross_prices_with_tax():
+    # setup
+    config = EnergyChartsTariffConfiguration(net=False, surcharge=0, tax=19)
+
+    # execution
+    prices = parse_response(config, SAMPLE_DATA)
+
+    # evaluation
+    assert prices == {"1717200000": 0.000119, "1717203600": 0.000238}
+
+
+SAMPLE_DATA = {
+    "unix_seconds": [1717200000, 1717203600],
+    "price": [100.0, 200.0]
+}