diff --git a/custom_components/bluetti_bt/bluetti_bt_lib/base_devices/ProtocolV1Device.py b/custom_components/bluetti_bt/bluetti_bt_lib/base_devices/ProtocolV1Device.py
index d7e3670..82cdd44 100644
--- a/custom_components/bluetti_bt/bluetti_bt_lib/base_devices/ProtocolV1Device.py
+++ b/custom_components/bluetti_bt/bluetti_bt_lib/base_devices/ProtocolV1Device.py
@@ -27,6 +27,13 @@ class ProtocolV1Device(BluettiDevice):
         # Battery
         self.struct.add_uint_field('total_battery_percent', 43)
 
+        # Battery packs
+        self.struct.add_uint_field('pack_num_max', 91) # internal
+        self.struct.add_decimal_field('total_battery_voltage', 92, 1)
+        self.struct.add_uint_field('pack_num', 96) # internal
+        self.struct.add_decimal_field('pack_voltage', 98, 2)  # Full pack voltage
+        self.struct.add_uint_field('pack_battery_percent', 99)
+
         # Output state
         self.struct.add_bool_field('ac_output_on', 48)
         self.struct.add_bool_field('dc_output_on', 49)
@@ -42,7 +49,11 @@ class ProtocolV1Device(BluettiDevice):
         return [
             ReadHoldingRegisters(10, 10),
             ReadHoldingRegisters(36, 4),
+            ReadHoldingRegisters(41, 1),
             ReadHoldingRegisters(43, 1),
+            ReadHoldingRegisters(91, 2),
+            ReadHoldingRegisters(96, 1),
+            ReadHoldingRegisters(98, 2),
             ReadHoldingRegisters(48, 2),
         ]
 
diff --git a/custom_components/bluetti_bt/bluetti_bt_lib/base_devices/ProtocolV2Device.py b/custom_components/bluetti_bt/bluetti_bt_lib/base_devices/ProtocolV2Device.py
index a6a87ca..ff94034 100644
--- a/custom_components/bluetti_bt/bluetti_bt_lib/base_devices/ProtocolV2Device.py
+++ b/custom_components/bluetti_bt/bluetti_bt_lib/base_devices/ProtocolV2Device.py
@@ -27,6 +27,13 @@ class ProtocolV2Device(BluettiDevice):
         # Battery
         self.struct.add_uint_field('total_battery_percent', 102)
 
+        # Battery packs
+        #self.struct.add_uint_field('pack_num_max', ?) # internal
+        #self.struct.add_decimal_field('total_battery_voltage', ?, 1)
+        #self.struct.add_uint_field('pack_num', ?) # internal
+        #self.struct.add_decimal_field('pack_voltage', ?, 2)  # Full pack voltage
+        #self.struct.add_uint_field('pack_battery_percent', ?)
+
         # Output state
         #self.struct.add_bool_field('ac_output_on', ?)
         #self.struct.add_bool_field('dc_output_on', ?)
@@ -44,6 +51,7 @@ class ProtocolV2Device(BluettiDevice):
         return [
             ReadHoldingRegisters(110, 6),
             ReadHoldingRegisters(116, 4),
+            ReadHoldingRegisters(154, 1),
             ReadHoldingRegisters(102, 1),
         ]
 
diff --git a/custom_components/bluetti_bt/bluetti_bt_lib/field_attributes.py b/custom_components/bluetti_bt/bluetti_bt_lib/field_attributes.py
index 6d4ce70..577ab94 100644
--- a/custom_components/bluetti_bt/bluetti_bt_lib/field_attributes.py
+++ b/custom_components/bluetti_bt/bluetti_bt_lib/field_attributes.py
@@ -24,18 +24,24 @@ class FieldAttributes:
 @dataclass(frozen=True)
 class PowerFieldAttributes(FieldAttributes):
     type = FieldType.NUMERIC
-    name: str
     unit_of_measurement = 'W'
     device_class = 'power'
     state_class = 'measurement'
 
+@dataclass
+class VoltageFieldAttributes(FieldAttributes):
+    type = FieldType.NUMERIC
+    unit_of_measurement = 'V'
+    device_class = 'voltage'
+    state_class = 'measurement'
+
 @dataclass(frozen=True)
 class OutletFieldAttributes(FieldAttributes):
     type = FieldType.BOOL
-    name: str
     device_class = 'outlet'
 
 FIELD_ATTRIBUTES = {
+    # Base device fields
     'dc_input_power': PowerFieldAttributes(
         name = 'DC Input Power',
     ),
@@ -48,6 +54,13 @@ FIELD_ATTRIBUTES = {
     'dc_output_power': PowerFieldAttributes(
         name = 'DC Output Power',
     ),
+    'power_generation': FieldAttributes(
+        type = FieldType.NUMERIC,
+        name = 'Total Power Generation',
+        unit_of_measurement = 'kWh',
+        device_class = 'energy',
+        state_class = 'total_increasing',
+    ),
     'total_battery_percent': FieldAttributes(
         type = FieldType.NUMERIC,
         name = 'Total Battery Percent',
@@ -55,6 +68,9 @@ FIELD_ATTRIBUTES = {
         device_class ='battery',
         state_class ='measurement',
     ),
+    'total_battery_voltage': VoltageFieldAttributes(
+        name = 'Total Battery Voltage',
+    ),
     'ac_output_on': OutletFieldAttributes(
         name = 'AC Output',
     ),
@@ -69,4 +85,20 @@ FIELD_ATTRIBUTES = {
         name = 'DC Output',
         setter = True,
     ),
+
+    # Device specific fields
 }
+
+def PACK_FIELD_ATTRIBUTES(pack: int):
+    return {
+        'pack_voltage': VoltageFieldAttributes(
+            name = f'Battery Pack {pack} Voltage',
+        ),
+        'pack_battery_percent': FieldAttributes(
+            type = FieldType,
+            name = f'Battery Pack {pack} Percent',
+            unit_of_measurement = '%',
+            device_class ='battery',
+            state_class ='measurement',
+        ),
+    }