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Your guide to emergency solar management: ESM low load events and testing

Emergency Solar Management (ESM) works to stabilise our network when there is a high amount of solar energy being generated from rooftop solar systems, and not enough demand from everyone in our network.

On a day like this, remote management of household solar is needed to prevent potential outages. This means that for a few hours, a Synergy customer’s solar, could be remotely turned off, and then on again.

ESM events are rare 

A day where remote management is needed to stabilise the grid and prevent outages are rare. If it does happen, it’s most likely to occur in the months leading in and out of spring and autumn when the days are sunny, solar production is high, but temperatures are mild.  When it happens, it’s because all other options have been exhausted. 

Monthly testing

To be prepared for an event, we need to carry out testing once a month. Testing usually takes between 15 minutes and an hour, and during that time your solar will be remotely switched off, then on again. 
We test that that our technology can connect to participating solar system inverters so solar can be remotely switched off, and then on again, and that interruptions are as minimal and non-disruptive as possible. 

View ESM tests and events

In the table below, you can see the dates and times solar systems subject to ESM requirements have been remotely managed due to either a test or the real thing (an ESM event).

 

ESM events
Error retrieving ESM data Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'Synergy.NPWS.Entities.Models.ViewModels.DataItems.ESMDataViewModel+ESMDataRoot' because the type requires a JSON object (e.g. {"name":"value"}) to deserialize correctly. To fix this error either change the JSON to a JSON object (e.g. {"name":"value"}) or change the deserialized type to an array or a type that implements a collection interface (e.g. ICollection, IList) like List<T> that can be deserialized from a JSON array. JsonArrayAttribute can also be added to the type to force it to deserialize from a JSON array. Path '', line 1, position 1.

About this event data

  • ESM information in this table will be updated within 24 hours following an ESM event or test.
  • Only ESM events or tests that impact more than 50 customers are shown here.
  • Just because a test or event is listed here it doesn’t necessarily mean your solar system was affected. To find out which ESM events and ESM tests affected your solar system, log into My Account and look under the ESM Solar tab.

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This ESM Event information is also available in My Account. To find out if your Solar PV system was impacted by these events, please log in to your My Account and view the information in the ESM Solar tab.

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ESM FAQs

For more information to understand ESM Event data, please visit our ESM Event FAQs for more information.

Learn more