I have the 2400 AC+ now for about a week and have a dynamic energy plan. This has a couple of consequences:
- Between approximately 12:30 - 14:00 or so, the energy price is strongly negative.
- There is enough sunlight to start charging already at around 6:30 in the morning.
First, I tried ZENKI mode. It is currently just going bananas. It's completely ignoring the price limits and wants to charge an almost 90% full battery in the night with maximum power at a price above the HIGH limit. During the day, the battery can be charged about 3 times fully by the sun, but ZENKI starts drawing extra power from the grid up to whatever charge limit you set. That wastes a lot of the solar and it makes the rest be delivered to the grid at hugely negative prices. How is this 'AI coupled to weather forecast'??
Then, there is 'Smart meter mode'. That one has 2 options that initially sounded interesting:
'Follow the surplus': this will kind of do what you would expect. It will only use what power is coming from the sun, up to the charge limit and send the rest to the grid. However, with the battery starting to charge at 6:30, it will be effectively full by about 11:00. That means it will deliver the bulk of the power generated by solar to the grid at the time when the prices are the most negative!
'Follow the schedule': this mode looks like it would solve the issue with premature charging. Setting a schedule from 11:30 - 15:30 for charging would work. However, you have to set the charge rate. If you set it to 1500W and the roof solar only generates 1200W, it will again draw 300W of power needlessly from the grid.
So, in conclusion, all available plans are bad. The only viable option is to manually toggle between different power plans during the day, every single day. The 'Follow the surplus' plan need the option to time-gate when to follow the surplus or the 'Follow the schedule' needs a 'Surplus only' for the charge rate. As they are now, all power plans are simply bad for roof solar.
