Saw this online, you have to sign up from the app, the credit is split over six months. From their website:
Get a head start on reducing your electricity costs. Sign-up via the Flow Power app to claim your $300 credit.* *Offer only available for new customers based in Victoria. A one-time $300 (incl. GST) sign-up credit will be applied as $50 across the first six electricity bills. Any unused credit will roll over to the next bill and is non-refundable, non-transferable, non-redeemable for cash. Offer only available for sign-ups between Friday 18th and Sunday 27th April Offer only available for new customer sign-ups until 30 June 2025.
$300 Credit - Receive a $300 credit when you switch to Flow Power. Simply sign up via our app and your credit will automatically apply – no promo code required.
Free Tech - Receive $150 worth of energy management tech – the Flow Kit – designed to help you save money. Monitor your live energy use and find the best times to power up.
100% GreenPower - We go one step further and link you to a local GreenPower accredited renewable generator – 100% of your annual electricity use will be matched with electricity it generates.
Rate Flexibility - Get rewarded for good energy habits. Reduce the rate you pay for electricity when you utilise cleaner, cheaper, daytime energy.
Just checked their rate, my bill with them will be 28.6% higher than my current energy provider, Powershop.