first commit

helix/models/sql/inverter_brands.py

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+from sqlalchemy import Column, Integer, ForeignKey
+
+from helix.models.sql.shared_sql_base import Base
+
+
+class InverterBrand(Base):
+    __tablename__ = 'inverter_brands'
+    id = Column(Integer, primary_key=True)
+    site_id = Column(Integer, ForeignKey('sites.id'), primary_key=True)
+
+    def to_json(self):
+        return {
+            'inverter_brand_id': self.id,
+        }