diff --git a/templates/definition/tariff/open-meteo.yaml b/templates/definition/tariff/open-meteo.yaml
new file mode 100644
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+++ b/templates/definition/tariff/open-meteo.yaml
@@ -0,0 +1,148 @@
+template: open-meteo
+products:
+  - brand: OpenMeteo
+requirements:
+  description:
+    en: Free Weather API [open-meteo.com](https://open-meteo.com) Open-Meteo is an open-source weather API and offers free access for non-commercial use. No API key required.
+    de: Freie Wetter API [open-meteo.com](https://open-meteo.com) Open-Meteo ist eine Open-Source-Wetter-API und bietet kostenlosen Zugriff für nicht-kommerzielle Nutzung. Kein API-Schlüssel erforderlich.
+  evcc: ["skiptest"]
+group: solar
+params:
+  - name: lat
+    description:
+      en: Latitude
+      de: Breitengrad
+    example: "55.7351"
+    required: true
+  - name: lon
+    description:
+      en: Longitude
+      de: Längengrad
+    example: "9.1275"
+    required: true
+  - name: dec
+    description:
+      en: Decline
+      de: Neigung
+    help:
+      en: 0 = horizontal, 90 = vertical
+      de: 0 = horizontal, 90 = vertikal
+    example: 25
+    required: true
+  - name: az
+    description:
+      en: Azimuth
+      de: Azimut
+    help:
+      en: -180 = north, -90 = east, 0 = south, 90 = west, 180 = north
+      de: -180 = Norden, -90 = Osten, 0 = Süden, 90 = Westen, 180 = Norden
+    example: 0
+    required: true
+  - name: kwp
+    description:
+      en: Maximum generator power [kWp]
+      de: Maximale Generatorleistung [kWp]
+    example: 9.8
+    required: true
+  - name: ac
+    description:
+      en: AC Power [kW]
+      de: AC Leistung [kW]
+    default: 1000
+    advanced: true
+  - name: dm
+    description:
+      en: Damping morning (0 = no damping 100 = full damping
+      de: Dämpfung morgens (0 = keine Dämpfung 100 = volle Dämpfung)
+    default: 0
+    advanced: true
+  - name: de
+    description:
+      en: Damping evening (0 = no damping 100 = full damping)
+      de: Dämpfung abends (0 = keine Dämpfung 100 = volle Dämpfung)
+    default: 0
+    advanced: true
+  - name: efficiency
+    description:
+      en: Efficiency [%]
+      de: Wirkungsgrad [%]
+    default: 100
+    advanced: true
+  - name: alphatemp
+    description:
+      en: Temperature coefficient
+      de: Temperaturkoeffizient
+    example: -0.004
+    default: -0.004
+    advanced: true
+  - name: rossmodel
+    description:
+      en: Cooling type [Ross Model]
+      de: Kühlung [Ross-Modell]
+    help:
+      en: Well Cooled (0.0200), Free Standing (0.0208), Flat on Roof (0.0260), Not So Well Cooled (0.0342), Transparent PV (0.0455), Facade Integrated (0.0538), On Sloped Roof (0.0563) [Paper](https://www.sciencedirect.com/science/article/pii/S0038092X20309107)
+      de: Gut Gekühlt (0.0200), Freistehend (0.0208), Flach auf Dach (0.0260), Nicht So Gut Gekühlt (0.0342), Transparentes PV (0.0455), Fassadenintegriert (0.0538), Auf Schrägdach (0.0563) [Paper](https://www.sciencedirect.com/science/article/pii/S0038092X20309107)
+    example: 0.0342
+    default: 0.0342
+    advanced: true
+  - name: interval
+    default: 1h
+    advanced: true
+render: |
+  type: custom
+  tariff: solar
+  forecast:
+    source: http
+    uri: https://api.open-meteo.com/v1/forecast?latitude={{ .lat }}&longitude={{ .lon }}&azimuth={{ .az }}&tilt={{ .dec }}&hourly=temperature_2m,global_tilted_irradiance&daily=sunrise,sunset&forecast_days=3&timezone=auto&timeformat=unixtime
+    jq: |
+      def alphatemp: {{ .alphatemp }}; # temperature coefficient
+      def rossmodel: {{ .rossmodel }}; # cooling type
+      def eff: {{ .efficiency }} / 100; # efficiency 1 = 100%
+      def kwp: {{ .kwp }} * 1000 ; # kWp
+      def ac: {{ .ac }} * 1000 ; # AC
+      def dm: {{ .dm }} / 100; # 1 = 100% damping morning (0 = no damping) 
+      def de: {{ .de }} / 100; # damping evening
+      def clamp(min; x; max):
+        if x < min then min elif x > max then max else x end;
+      def midday(sunrise; sunset):
+        sunrise + ((sunset - sunrise) / 2);
+      def calculate_damping(time; sunrise; sunset; m; e):
+        if time < sunrise then m
+        elif time < midday(sunrise; sunset) then
+          m * (1 - ((time - sunrise) / (midday(sunrise; sunset) - sunrise)))
+        elif time < sunset then
+          e * ((time - midday(sunrise; sunset)) / (sunset - midday(sunrise; sunset)))
+        else
+          e
+        end;
+      .hourly as $h
+      | .daily as $d
+      | [ range(0; ($h.time | length))
+          | . as $i
+          | $h.time[$i] as $time
+          | ($i / 24 | floor) as $day
+          | {
+              start: ($time | todateiso8601),
+              end: (($time + 3600) | todateiso8601),
+              price: (
+                kwp
+                * ($h.global_tilted_irradiance[$i] / 1000)
+                * (1 + ( alphatemp *
+                      (
+                        ( ($h.temperature_2m[$i]
+                            + ($h.temperature_2m[$i-1] // $h.temperature_2m[$i])
+                          ) / 2)
+                        + ($h.global_tilted_irradiance[$i] / 800.0) * rossmodel - 25.0
+                      )
+                    ))
+                * (1 - calculate_damping($time;
+                      $d.sunrise[$day];
+                      $d.sunset[$day];
+                      dm; de))
+                * eff
+                | clamp(0; .; ac)
+              )
+            }
+        ]
+      | tostring
+  interval: {{ .interval }}