Fimer R55 Series Manual - Página 8

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Enter the temperature coefficient of the output of the PV generator here. You can find the values in

the data sheet of the modules.

Note that the temperature coefficient is negative, but that you have to enter a positive figure here.

Example: The modules used have a temperature coefficient of γ (P_MPP) = -0.33%/°C. In this case

enter the value 0.33%/°C.

Parameter number 280: Yield variation alarm threshold

Short Description

Unit

Accuracy

Under this parameter, you enter the value for variation between the yield of the inverter and the

"theoretical yield" of the sensor or between the yields of all the inverters in the installation,

referenced to the nominal DC output. If this value is overshot, an alarm is activated.

Parameter number 283: Activation code for yield monitoring

Short Description

Default value

Enter the code given to you by FIMER.

7.4 Data evaluation

Parameter number 220: Sensor output

Short Description

Unit

The instantaneous output of the PV generator to be expected in theory is calculated here on

the basis of the irradiation sensor reading, the total module surface area, the module

efficiency, the module temperature and the output temperature coefficient of the modules.

Note that this theoretical output always deviates greatly compared with the actual output of the PV

generator. This is due to the different materials used in the cells of the generator and sensor,

different temperatures, and possible shadowing or soiling. Parameter 220 serves as a rough guide

or interim value for display under parameters 216 and 219.

Parameter number 216: Yield of the sensor today

Short Description

Unit

The day yield meter of the sensor displays the "day yield" calculated for the sensor. It is used to

compare the actual day yield (see parameter 8) with the theoretical, calculated "yield" of the sensor.

Based on the module surface area, module efficiency and module temperature coefficient, we

recommend that after a certain length of time (e.g. 1 to 2 months) you set the "day yield of the

sensor" manually such that the sensor yield value is roughly equal to the actual yield. This will

enable you to detect module or string failures (or failure of the sensor) if they arise.

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Installation Monitoring

EAW

kWh/kW

0,500 kWh/kW

Installation Monitoring

FSC

Environment

PSENS

Environment

SET