The income from net balancing does not depend solely on the number of solar panels or the size of your battery. While those factors play a role, they are not the only things that matter.
What matters is how much flexibility your system can provide at any given moment: how full or empty your battery is, your current and estimated future consumption, and whether your system is available when the grid needs assistance.
Two households with identical solar panels can have very different consumption profiles at the same time. If your battery is already full, or if you are consuming a lot at that moment, FlexiO has less room to step in, and you earn less than someone whose system has more flexibility at that time.
The type of net balancing also matters. With rPOWR we reserve capacity in advance through bids, while with ePOWR we look at live imbalances on our electricity grid.
If you want more insight into how net balancing works, see our documentation on net balancing in our knowledge base.