Iguana its basically free money for a small bit of use of your inverter and battery to help the grid out
I’ve been on Axle since October last year. It is what it says it is, you get £1/kWh for exporting in an event, and if you don’t earn £10 in a month then its topped up to £10 for that month. Typically 2-3 events a month so depends on your battery type as to whether you’ll always be getting topped up or will export more than 10kWh in the month.
Axle is currently in beta test which was due to finish in March but has been extended. I predict these rates will drop when the beta test is over, but to what, no idea.
The only disadvantage is that if you have a relatively small battery then the axle export could run your battery down and you’ll start grid importing sooner. This certainly happened to me in winter, but at £1/kWh I was still better off even after paying for the grid importing.
There haven’t so far been too many events so the impact of these exports on your battery longevity is minimal.
No real downsides