Solare-datensysteme Solar-Log Manual de usuario descargar pdf (Pagina 137)

137

Special functions

Note

The 70% reduction is always applied to the entire plant.

All of the inverters are controlled on the same level by the Solar-Log™, independent of

their alignments (east-west orientation). This can lead to a lower feed-in amount than

the maximum allowed.

Example 1

DC power 12 kWp

AC power 12 kW

70% of the DC power corresponds to 8.4kW

As the AC and DC power are identical, the down-control is correct.

Example 2

DC power 12 kWp

AC power 10kW

70% of the DC power corresponds to 8.4kW

For this reason the inverter controlled by the Solar Log™ is reduced to 84% (8.4kW) and not only to 70%

(7kW).

23�2�7 70% Fixed reduction with the calculation of self-consumption

This function is an enhancement to the 70% fixed reduction described in the previous chapter.

The Solar-Log™ needs to be linked to a consumption meter to implement this function. Please note the

instructions in chapter”12.5 External power meter”.

The configuration of this corresponds to that already described for the 70% fixed reduction.

Procedure

•

Select 70% Fixed reduction with the calculation of self-consumption

•

Select the interface of the inverter that is to be reduced

•

SAVE settings.

Note

The Solar-Log™ needs to be linked to a consumption meter to implement this function.

Please note the instructions in chapter”12.5 External power meter”.

The current amount of self-consumption is calculated by employing a power meter for self-consumption.

The consumption is calculated with the energy generated by the inverter.

If the difference between the current production and consumption is lower than 70% of the module‘s

power output, the inverters are regulated accordingly, so that the amount of power at the feeding point is

still only at 70% of the connected generator power.

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Solare-datensysteme Solar-Log Manual de usuario Pagina 137