Open-loop control

The Sunny Tripower X 25 is equipped with digital inputs, which can for example be used to connect a ripple control receiver. When the Sunny Tripower X 25 receives setpoints in the form of digital signals via the ripple control receiver, open-loop control is used. The Sunny Tripower X 25 reacts to the setpoints and implements them.

During open-loop control operations, the Sunny Tripower X 25 does not check whether the specified setpoint matches the actual value, in other words the current value at the point of interconnection. There is therefore no actual value feedback to be processed further. It is not necessary to measure the feed-in power at the point of interconnection, and therefore systems with open-loop control do not require an energy meter.

Advantages:

• If the grid operator specifies setpoints and directly transmits these to the Sunny Tripower X 25 as digital signals via a ripple control receiver, the Sunny Tripower X 25 implements these specifications. If the Sunny Tripower X 25 is used as system manager, it can run subordinate inverters using open-loop control and can transmit the specifications to the subordinate inverters.

• "Open-loop control" is a standard function in each Sunny Tripower X 25.

Disadvantages:

• Open-loop control does not consider the possible self-consumption. Increased self-consumption is only possible with closed-loop control.