Yield optimization

Improve yield thanks to dynamic reconfiguration

In a classical installation, modules are connected in strings and the strings are connected in parallel before reaching the inverter. The yield of the whole system can be significantly reduced by modules' mismatches (factory mismatch, temperature variation, unequal aging, partial shadowing). One single module can block the production of a whole string.

The Smart Power Booster (SPB) compensates mismatch losses thanks to the dynamic reconfiguration. The SPB measures continuously the output of the PV field. On a regular basis, it also establishes the I/V curve of each single module. According to those measurements, the SPB reconfigures the string connections.

The SPB works as an electritian would on your roof: it follows continuously the status of the modules and modifies the connections to take the maximum out of the PV installation.

The following schematics illustrate the principle of the dynamic reconfiguration:

Ideal situation :

All modules present identical optimal characteristics. There are no mismacth losses.

Several mismatches on the PV field:

Different mismatches are impacting the PV field (temperature variation, partial shadows, factory mismatch, etc...).

The lowest current module fixes the string current.

The lowest string voltage fixes the sytem voltage.

Result of the dynamic reconfiguration:

After measuring the I/V curves, the SPB reorganizes the modules to maximize the power output of the system.

In this example, 40% of mismatch losses are recovered.

Example of gain:

Example 1

Yield forecast: 1100 kWh/kWp.

Peak power: 3 kWp.

FIT: 0.58 €/kWh.

Click on the picture to see the potential gain over 20 years.

Example 2

Yield forecast: 1100 kWh/kWp.

Peak power: 9 kWp.

FIT: 0.35 €/kWh.

Click on the picture to see the potential gain over 20 years.

Note: Module aging is not homogeneous. Module mismatch will increase over the years. The gain provided by the SPB will increase proportionnally.

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