CT coils in combination with the Peblar are designed to measure only positive AC power readings, with a supported capacity of up to 70A. While they can be used for load balancing, this combination does not detect negative current, which is essential for our solar charging feature.
As a result, our solar charging feature is not supported when using CT coils.
Even when not using our solar charging feature, when solar panels are installed the CT coils still register the current produced by the solar panels as positive consumption rather than negative feed-in.
This may lead to a problem if you do use our dynamic load balancing feature, and your solar current can get close to the specified limit.
If the solar current is within 6A of the DLB limit, charging will not start since the system thinks too much current is used already.
We would always advise to use any of the other integrated measurement sources (such as for example a P1 dongle), when wanting to use the solar charging functionality.
Why CT clamps cannot measure solar surplus
A CT clamp only measures how much current flows, not in which direction. When your solar panels feed energy back to the grid, the clamp reads that as consumption. Solar surplus is then seen as extra load, and household consumption appears higher than it is, so limits are exceeded incorrectly. Solar charging and accurate household load balancing need both the amount and the direction of the energy flow, which only a bidirectional energy meter provides. This is a hardware limitation of CT clamps and cannot be solved with a software update, also not on chargers that are already installed.