All general questions and discussion related to energy
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Whether you can get onto the Seniors Savers Plan might depend on location.
I'm not sure if it comes up under the usual plan searches, which must be done for your property address to get the right info, it seems to be 'hidden' from the usual offerings.
So it's probably necessary to go to https://www.agl.com.au/help-support/contact-us and phone, message, or use the chat option to get in touch with AGL and run through that.
I was on it briefly before going onto the EV plan, I thought it was a single one of $25, but in other material I read a few weeks ago, it said the Seniors Savers plan was up to $100 a year, so that $25 might apply to each quarter.