Steering of Inverters. The Meaning of « Yesterday »

Audience

This article is written for those, who struggle to understand the rationale behind certain Inverter Registers.

Style

The article is written exactly as I would have wanted it before I knew it.

The Meaning of « Yesterday »

Most Inverters have a Register called Energy Today and a Register called Energy Yesterday.

If you wonder why this article is for you.

« Today »

« Today » has one interesing quality. It is not complete until it is over and when it is over it is not anymore « Today », but becomes « Yesterday ».

« Yesterday »

« Yesterday » has the interesting quality. It holds the value of « Today » the moment « Today » becomes complete.

Conclusion

Therefore « Yesterday » is not a random quirk by the people who wrote the software of the Inverter.

But the holder of « Today »

How is Energy Yesterday Useful?

Energy Yesterday is useful, because it allows the reading of the Energy Produced by the Inverter without a dedicated Power Meter.

Power Meters are not inexpensive and the ability to read the Energy Produced by the Inverter from the Inverter reduces the cost of the Installation.

Compatability

Energy Today and Energy Yesterday is provided by the following vendors —

Solis