Update energy-rates.md

docs/energy-rates.md

@@ -10,10 +10,12 @@
 
 For Predbat to automatically manage saving sessions you will need to make sure that **octopus_saving_session** is set in apps.yaml to point to the saving session binary sensor supported by the Octopus Energy plugin (see template apps.yaml for the default name)
 
-When a saving session is active the energy rates for import and export will be overridden with the assumed rate set in Home Assistant with **input_number.predbat_metric_octopus_saving_rate**, if this rate is 0 then the feature is disabled (default). You should set this to the saving rate published by Octopus for the session (currently there is no sensor for this rate).
+When a saving session is active the energy rates for import and export will be overridden with the assumed rate will be taken from the Octopus Energy add-in (v9.1.0 and above) or if not reported it can be set in Home Assistant with **input_number.predbat_metric_octopus_saving_rate** (default is 0).
 
 If you are using expert mode, for best results: **switch.predbat_combine_charge_slots** (_expert mode_) is turned off. Set **input_number.rate_low_threshold** (_expert mode_) and **input_number.rate_high_threshold** (_expert mode_) to 0 for automatic mode.
 
+For forced export you need to ensure that **switch.predbat_calculate_best_discharge** is enabled and that **switch.predbat_set_discharge_freeze_only** is disabled. If you do not have an export tariff then forced export will not apply.
+
 ## Rate bands
 
 - you can configure your rate bands (assuming they repeat) using rates_import/rates_export (see below)