gcoan · May 16, 2026 · May 16, 2026 · May 18, 2026 · May 18, 2026 · May 18, 2026
diff --git a/README.md b/README.md
@@ -19,7 +19,7 @@ If you want to buy me a beer then please use [Paypal](https://paypal.me/predbat?
 * Use my referral code for Axle Energy (UK): <https://vpp.axle.energy/landing/grid?ref=R-VWIICRSA>
 
 If you are finding Home Assistant and Predbat too difficult to set up yourself there is now [PredBat Cloud](https://predbat.com/) which is a paid for version of Predbat hosted in the cloud.
-Please note that while I have given permission for PredBat Cloud to operate this is not my company, PredBat will remain open source for everyone personal use.
+Please note that while I have given permission for PredBat Cloud to operate, this is not my company and PredBat will remain open source for everyone's personal use.
 
 ## Predbat documentation
 

diff --git a/apps/predbat/axle.py b/apps/predbat/axle.py
@@ -368,7 +368,8 @@ async def _fetch_byok_event(self):
                     if self.get_arg("set_event_notify"):
                         local_start = start_time.astimezone(self.local_tz)
                         local_end = end_time.astimezone(self.local_tz)
-                        self.call_notify("Predbat: Scheduled Axle VPP event {}-{}, {} p/kWh".format(local_start.strftime("%a %d/%m %H:%M"), local_end.strftime("%H:%M"), self.pence_per_kwh))
+                        msg = "Scheduled Axle VPP event " + local_start.strftime("%a %d/%m %H:%M") + "-" + local_end.strftime("%H:%M") + self.pence_per_kwh + " p/kWh"
+                        self.call_notify(f"{self.prefix.capitalize()}: {msg}")
 
             self.cleanup_event_history()
             self.publish_axle_event()

diff --git a/apps/predbat/inverter.py b/apps/predbat/inverter.py
@@ -116,7 +116,7 @@ def auto_restart(self, reason):
                         self.log("Warn: Calling restart service {}".format(service))
                         self.base.call_service_wrapper(service)
                     if self.base.get_arg("set_system_notify"):
-                        self.base.call_notify("Auto-restart service {} called due to: {}".format(service, reason))
+                        self.base.call_notify(f"{self.base.prefix.capitalize()}: Auto-restart service {service} called due to: {reason}")
                     self.sleep(15)
             raise Exception("Auto-restart triggered")
         else:
@@ -1620,7 +1620,7 @@ def adjust_reserve(self, reserve):
             else:
                 self.write_and_poll_value("reserve", self.base.get_arg("reserve", indirect=False, index=self.id, required_unit="%"), reserve)
             if self.base.set_inverter_notify:
-                self.base.call_notify("Predbat: Inverter {} Target Reserve has been changed to {}% at {}".format(self.id, dp0(reserve), self.base.time_now_str()))
+                self.base.call_notify(f"{self.base.prefix.capitalize()}: Inverter {self.id} Target Reserve has been changed to {dp0(reserve)}% at {self.base.time_now_str()}")
             self.mqtt_message(topic="set/reserve", payload=reserve)
         else:
             self.base.log("Inverter {} Current reserve is {}%, already at target".format(self.id, dp0(current_reserve)))
@@ -1702,7 +1702,7 @@ def adjust_charge_rate(self, new_rate, notify=True):
                     self.set_current_from_power("charge", new_rate)
 
             if notify and self.base.set_inverter_notify:
-                self.base.call_notify("Predbat: Inverter {} charge rate changes to {}W at {}".format(self.id, new_rate, self.base.time_now_str()))
+                self.base.call_notify(f"{self.base.prefix.capitalize()}: Inverter {self.id} charge rate changes to {new_rate}W at {self.base.time_now_str()}")
             self.mqtt_message(topic="set/charge_rate", payload=new_rate)
 
     def adjust_discharge_rate(self, new_rate, notify=True):
@@ -1740,7 +1740,7 @@ def adjust_discharge_rate(self, new_rate, notify=True):
                     self.set_current_from_power("discharge", new_rate)
 
             if notify and self.base.set_inverter_notify:
-                self.base.call_notify("Predbat: Inverter {} discharge rate changes to {}W at {}".format(self.id, new_rate, self.base.time_now_str()))
+                self.base.call_notify(f"{self.base.prefix.capitalize()}: Inverter {self.id} discharge rate changes to {new_rate}W at {self.base.time_now_str()}")
             self.mqtt_message(topic="set/discharge_rate", payload=new_rate)
 
     def adjust_battery_target(self, soc, isCharging=False, isExporting=False):
@@ -1786,7 +1786,7 @@ def adjust_battery_target(self, soc, isCharging=False, isExporting=False):
                 self.press_and_poll_button()
 
             if self.base.set_inverter_notify:
-                self.base.call_notify("Predbat: Inverter {} Target SoC has been changed to {}% at {}".format(self.id, soc, self.base.time_now_str()))
+                self.base.call_notify(f"{self.base.prefix.capitalize()}: Inverter {self.id} Target SoC has been changed to {soc}% at {self.base.time_now_str()}")
             self.mqtt_message(topic="set/target_soc", payload=soc)
         else:
             self.base.log("Inverter {} Current Target SoC is {}%, already at target".format(self.id, current_soc))
@@ -2037,7 +2037,7 @@ def adjust_pause_mode(self, pause_charge=False, pause_discharge=False):
                 self.write_and_poll_option("pause_mode", entity_mode, new_pause_mode)
 
             if self.base.set_inverter_notify:
-                self.base.call_notify("Predbat: Inverter {} pause mode to set {} at time {}".format(self.id, new_pause_mode, self.base.time_now_str()))
+                self.base.call_notify(f"{self.base.prefix.capitalize()}: Inverter {self.id} pause mode to set {new_pause_mode} at time {self.base.time_now_str()}")
 
             self.base.log("Inverter {} set pause mode to {}".format(self.id, new_pause_mode))
 
@@ -2110,7 +2110,7 @@ def adjust_inverter_mode(self, force_export, changed_start_end=False):
 
             # Notify
             if self.base.set_inverter_notify:
-                self.base.call_notify("Predbat: Inverter {} Force export set to {} at time {}".format(self.id, force_export, self.base.time_now_str()))
+                self.base.call_notify(f"{self.base.prefix.capitalize()}: Inverter {self.id} Force export set to {force_export} at time {self.base.time_now_str()}")
 
             self.base.log("Inverter {} set force export to {}".format(self.id, force_export))
 
@@ -2396,7 +2396,7 @@ def adjust_force_export(self, force_export, new_start_time=None, new_end_time=No
         # Notify
         if changed_start_end:
             if self.base.set_inverter_notify:
-                self.base.call_notify("Predbat: Inverter {} Export time slot set to {} - {} at time {}".format(self.id, new_start, new_end, self.base.time_now_str()))
+                self.base.call_notify(f"{self.base.prefix.capitalize()}: Inverter {self.id} Export time slot set to {new_start} - {new_end} at time {self.base.time_now_str()}")
 
     def disable_charge_window(self, notify=True):
         """
@@ -2444,7 +2444,7 @@ def disable_charge_window(self, notify=True):
                         self.enable_charge_discharge_with_time_current("charge", False)
 
             if self.base.set_inverter_notify and notify:
-                self.base.call_notify("Predbat: Inverter {} Disabled scheduled charging at {}".format(self.id, self.base.time_now_str()))
+                self.base.call_notify(f"{self.base.prefix.capitalize()}: Inverter {self.id} Disabled scheduled charging at {self.base.time_now_str()}")
 
             self.base.log("Inverter {} Turning off scheduled charge".format(self.id))
 
@@ -2807,7 +2807,7 @@ def adjust_charge_window(self, charge_start_time, charge_end_time, minutes_now):
                 self.rest_setChargeSlot1(new_start, new_end)
 
             if self.base.set_inverter_notify:
-                self.base.call_notify("Predbat: Inverter {} Charge window change to: {} - {} at {}".format(self.id, new_start, new_end, self.base.time_now_str()))
+                self.base.call_notify(f"{self.base.prefix.capitalize()}: Inverter {self.id} Charge window change to: {new_start} - {new_end} at {self.base.time_now_str()}")
             self.base.log("Inverter {} Updated start and end charge window to {} - {} (old {} - {})".format(self.id, new_start, new_end, old_start, old_end))
 
         if (old_charge_schedule_enable == "off" or have_disabled) and (new_start != new_end):
@@ -2824,7 +2824,7 @@ def adjust_charge_window(self, charge_start_time, charge_end_time, minutes_now):
 
             # Only notify if it's a real change and not a temporary one
             if old_charge_schedule_enable == "off" and self.base.set_inverter_notify:
-                self.base.call_notify("Predbat: Inverter {} Enabling scheduled charging at {}".format(self.id, self.base.time_now_str()))
+                self.base.call_notify(f"{self.base.prefix.capitalize()}: Inverter {self.id} Enabling scheduled charging at {self.base.time_now_str()}")
 
             self.charge_enable_time = True
 

diff --git a/apps/predbat/octopus.py b/apps/predbat/octopus.py
@@ -2781,7 +2781,7 @@ def fetch_octopus_sessions(self):
         octopus_saving_slots = []
         if "octopus_saving_session" in self.args:
             saving_rate = 200  # Default rate if not reported
-            octopoints_per_penny = self.get_arg("octopus_saving_session_octopoints_per_penny", 8)  # Default 8 octopoints per found
+            octopoints_per_penny = self.get_arg("octopus_saving_session_octopoints_per_penny", 8)  # Default 8 octopoints per penny
 
             joined_events = []
             available_events = []
@@ -2811,17 +2811,23 @@ def fetch_octopus_sessions(self):
                             saving_rate = octopoints_kwh / octopoints_per_penny  # Octopoints per pence
                         else:
                             saving_rate = saving_rate  # Use default if not specified
-                        if code:  # Join the new Octopus saving event and send an alert
+                        if code:  # Join the new Octopus saving event and send an alert if successfully joined
                             self.log("Octopus: Joining Octopus saving event code {} {}-{} at rate {} p/kWh".format(code, start_time.strftime("%a %d/%m %H:%M"), end_time.strftime("%H:%M"), saving_rate))
                             entity_id_join = self.get_arg("octopus_saving_session_join", indirect=False)
                             if entity_id_join:
                                 # Join via selector
-                                self.call_service_wrapper("select/select_option", entity_id=entity_id_join, option=code)
+                                cmd = "select/select_option, entity_id={}, option={}".format(entity_id_join, code)
+                                result = self.call_service_wrapper("select/select_option", entity_id=entity_id_join, option=code)
                             else:
                                 # Join via octopus event (Bottle Cap Dave)
-                                self.call_service_wrapper("octopus_energy/join_octoplus_saving_session_event", event_code=code, entity_id=entity_id)
-                            if self.get_arg("set_event_notify"):
-                                self.call_notify("Predbat: Joined Octopus saving event {}-{}, {} p/kWh".format(start_time.strftime("%a %d/%m %H:%M"), end_time.strftime("%H:%M"), saving_rate))
+                                cmd = "octopus_energy/join_octoplus_saving_session_event, event_code={}, entity_id={}".format(code, entity_id)
+                                result = self.call_service_wrapper("octopus_energy/join_octoplus_saving_session_event", event_code=code, entity_id=entity_id)
+                            if result:
+                                if self.get_arg("set_event_notify"):
+                                    msg = "Joined Octopus saving event " + start_time.strftime("%a %d/%m %H:%M") + "-" + end_time.strftime("%H:%M") + ", " + saving_rate + " p/kWh"
+                                    self.call_notify(f"{self.prefix.capitalize()}: {msg}")
+                            else:
+                                self.log("Warn: Unable to join Octoplus saving event with command {}, result was {}".format(cmd, result))
                             self.octopus_last_joined_try = self.now_utc
 
             # Default saving session rate for when octopoints_per_kwh is not available

diff --git a/apps/predbat/output.py b/apps/predbat/output.py
@@ -2412,7 +2412,7 @@ def record_status(self, message, debug="", had_errors=False, notify=False, extra
                 # Already in error state, do not notify second error in a single run (spam)
                 pass
             else:
-                self.call_notify("Predbat status change to: " + message + extra)
+                self.call_notify(f"{self.prefix.capitalize()} status change to: {message} {extra}")
                 self.previous_status = message
 
         error_count = self.get_state_wrapper(self.prefix + ".status", attribute="error_count", default=0)

diff --git a/apps/predbat/predbat.py b/apps/predbat/predbat.py
@@ -1174,7 +1174,7 @@ def download_predbat_version(self, version):
         if files:
             # Notify before killing threads so the WebSocket is still healthy
             if self.get_arg("set_system_notify"):
-                self.call_notify("Predbat: update to: {}".format(version))
+                self.call_notify(f"{self.prefix.capitalize()}: update to: {version}")
 
             # Kill the current threads
             self.log("Kill current threads before update")

diff --git a/apps/predbat/userinterface.py b/apps/predbat/userinterface.py
@@ -605,7 +605,7 @@ async def async_restore_settings_yaml(self, filename):
                     self.log("Restore setting: {} = {} (was {})".format(item["name"], item["default"], item["value"]))
                     await self.async_expose_config(item["name"], item["default"], event=True)
             if self.get_arg("set_system_notify"):
-                await self.async_call_notify("Predbat settings restored from default")
+                await self.async_call_notify(f"{self.prefix.capitalize()} settings restored from default")
         else:
             filepath = os.path.join(self.save_restore_dir, filename)
             if os.path.exists(filepath):
@@ -620,7 +620,7 @@ async def async_restore_settings_yaml(self, filename):
                             self.log("Restore setting: {} = {} (was {})".format(item["name"], item["value"], current["value"]))
                             await self.async_expose_config(item["name"], item["value"], event=True)
                 if self.get_arg("set_system_notify"):
-                    await self.async_call_notify("Predbat settings restored from {}".format(filename))
+                    await self.async_call_notify(f"{self.prefix.capitalize()} settings restored from {filename}")
         await self.async_expose_config("saverestore", None)
 
     def load_current_config(self):
@@ -692,7 +692,7 @@ async def async_save_settings_yaml(self, filename=None):
             yaml.dump(self.CONFIG_ITEMS, file)
         self.log("Saved Predbat settings to {}".format(filepath_p))
         if self.get_arg("set_system_notify"):
-            await self.async_call_notify("Predbat settings saved to {}".format(filename))
+            await self.async_call_notify(f"{self.prefix.capitalize()} settings saved to {filename}")
 
     def read_debug_yaml(self, filename):
         """

diff --git a/docs/apps-yaml.md b/docs/apps-yaml.md
@@ -891,6 +891,8 @@ To disable, set it to 1440.
 - **iboost_energy_today** - Set to a sensor which tracks the amount of energy sent to your solar diverter, which can also be used to subtract from your historical load
 for more accurate predictions.
 
+The iboost energy sensor should reset to zero each day so if your source sensor doesn't, then its recommended to wrap it in a utility meter and configure Predbat to use the utility meter.
+
 ## Inverter control configurations
 
 ### **inverter_limit**
@@ -1332,9 +1334,16 @@ Called when a charge/discharge is cancelled and the inverter goes back to home d
 topic: **topic**/set/auto
 payload: true
 
-## Solcast Solar Forecast
+## Solar Forecast
+
+As described in the [Predbat installation instructions](install.md#solar-forecast-install), Predbat needs a solar forecast
+in order to predict solar generation and battery charging.
+
+The Solar forecast configuration in `apps.yaml` should be configured for either for the [Solcast integration](#solcast-solar-forecast), [Forecast.solar](#forecastsolar-solar-forecast) or [Open-Meteo](#open-meteo-solar-forecast).
+
+### Solcast Solar Forecast
 
-As described in the [Predbat installation instructions](install.md#solcast-install), Predbat needs a solar forecast
+As described in the [Predbat installation instructions](install.md#solar-forecast-install, Predbat needs a solar forecast
 in order to predict solar generation and battery charging which can be provided by the Solcast integration.
 
 By default, the template `apps.yaml` is pre-configured to use the [Solcast forecast integration](install.md#solcast-home-assistant-integration-method) for Home Assistant.
@@ -1408,7 +1417,7 @@ This can have an impact on planning, especially for things like freeze charging
 
 See also [PV configuration options in Home Assistant](customisation.md#solar-pv-adjustment-options).
 
-## Forecast.solar Solar Forecast
+### Forecast.solar Solar Forecast
 
 The Forecast.solar service can also be used in Predbat, the free version offer access without an API Key but is limited to hourly data and does not provide any 10% or 90% data.
 Predbat Solar calibration can use past data to improve this information and provide the 10% data.
@@ -1450,11 +1459,11 @@ Optionally you can set an api_key for personal or professional accounts and you
 
 Note you can omit any of these settings for a default value. They do not have to be exact if you use Predbat auto calibration for PV to improve the data quality.
 
-## Open-Meteo Solar Forecast
+### Open-Meteo Solar Forecast
 
 [Open-Meteo](https://open-meteo.com/) is a free, open-source weather API that provides solar irradiance forecasts with no API key required.
 Predbat fetches the Global Tilted Irradiance (GTI) for each array and converts it to a power estimate using a PVWatts cell-temperature model.
-Ensemble members are used to derive a P10 pessimistic estimate alongside the central P50.
+Ensemble members are used to derive a PV10 pessimistic estimate alongside the central PV50.
 
 You can define one or more rooftop arrays by providing a list; they will be summed automatically.
 
@@ -1524,7 +1533,7 @@ These are described in detail in [Energy Rates](energy-rates.md) and are listed
 - **rates_export_override** - Over-ride export rate for specific date and time range
 - **futurerate_url** - URL of future energy market prices for Agile users
 - **futurerate_adjust_import** and **futurerate_adjust_export** - Whether tomorrow's predicted import or export prices should be adjusted based on market prices or not
-- **futurerate_adjust_auto** - Auto-detect which of import/export are Agile and calibrate only those rates; overrides `futurerate_adjust_import` / `futurerate_adjust_export`; requires the Octopus Energy integration or Predbat's Octopus Component
+- **futurerate_adjust_auto** - Auto-detect which of the import/export rates are Agile and calibrate only those rates; overrides `futurerate_adjust_import` / `futurerate_adjust_export`; requires the Octopus Energy integration or Predbat's Octopus Component
 - **futurerate_peak_start** and **futurerate_peak_end** - start/end times for peak-rate adjustment
 - **carbon_postcode** - Postcode to retrieve Carbon intensity grid information for
 - **carbon_automatic** - Retrieve Carbon intensity information automatically based upon postcode
@@ -1739,7 +1748,7 @@ rather than the usual *givtcp_SERIAL_NUMBER_soc* GivTCP entity so everything lin
 Default false. When set to true Predbat will automatically calculate `battery_scaling` based on historical charge data rather than using the static value above.
 
 The calculation uses `find_battery_size()` to estimate the actual usable battery capacity from historical charging periods and
-compares it to the nominal capacity (`soc_max`). A 7-day rolling history of daily estimates is stored in a new sensor
+compares it to the nominal capacity (`soc_max`). A 7-day rolling history of daily estimates is stored in the sensor
 `sensor.predbat_soc_max_calculated` (or `sensor.predbat_soc_max_calculated_N` for inverter N > 0).
 The sensor state is the trimmed mean of the history (the highest and lowest samples are discarded when 3 or more data points exist,
 giving a stable average that is robust to occasional outliers).