FAQ

FAQ

1) How do I know if my solar panels are already degraded?

2) How do I get assured that the PIDbox is working properly? How can I check this after the installation?

3) Can you guarantee that the PIDbox does not harm my solar panels on the long term?

4) Does a defect of the PIDbox has any consequences for my electricity production?

5) How can I find out whether a defect is due to the PIDbox or to the inverter(s)?

6) What is the size of the PIDbox?

7) If your solar panels are still new, is buying a PIDbox still useful?

8) What is the difference between solar panels produced before and after 2008?

9) Is it true that the PIDbox has a lifetime of 20 years ? Why is only a legal warranty of two years given ?

10) Can you show me some references from people who have already bought a PIDbox?

11) Why do different PV systems are subjected to different losses of efficiency? Why does the study of Thomas More Hogeschool shows an efficiency gain of less than 2 % for a certain PV system and more than 16 % for another installation?

12) Is the PIDbox also compatible with thin film solar panels?

13) What to do when my PIDbox has no LED-signal?

14) My installer claims that my solar panels are not PID sensitive, is this correct?

15) Is the PIDbox compatible with micro-inverters?

1) How do I know if my solar panels are already degraded?

Your solar panels are from the first day on subjected to degradation. The only question is to which degree. In Scientific research of Thomas More Hogeschool in more than 30 PV plants showed that the efficiency of the solar panels investigated increased, a few weeks after the installation of a PIDbox, on average by 7.5%, with a minimum of 1.3% and a maximum of 16.7%.

The degree to which your solar panels are subjected to degradation mainly depends on the follow factors:
• The type of inverter
• The number of solar panels in series
• The age of the PV system

You can monitor the performance of your PV system by means of the online portal ‘My Ilumen’. Create your free account, enter the details of your installation and then check the efficiency of your solar panels!

2) How do I get assured that the PIDbox is working properly? How can I check this after the installation?

Several independent tests have shown that the PIDbox significantly increases the efficiency of your solar panels.

The PIDbox is equipped with a number of LEDs that show the operating status of the device. To check the well functioning of the PIDbox, there is a blue LED signal during the day and a red LED signal at night (during operation).

You can monitor the efficiency of your solar panels after the installation of a PIDbox by means of the online portal ‘My Ilumen’ .

3) Can you guarantee that the PIDbox does not harm my solar panels on the long term?

The PIDbox will absolutely not harm your solar panels. This device actually increases the efficiency of your solar panels while their life is extended.

4) Does a defect of the PIDbox has any consequences for my electricity production?

At daytime the PIDbox is inactive. All power generated flows from the solar panels through this device to the inverter. In case of a defect, this does not affect electricity production.

5) How can I find out whether a defect is due to the PIDbox or to the inverter(s)?

The PIDbox works independently of the inverter. Both systems therefore do not influence each other. To check the well functioning of the PIDbox, there is a blue LED signal during the day and a red LED signal at night (during operation).

6) What is the size of the PIDbox?

The PIDbox Mini has a size of 270 mm width x 200 mm depth x 75 mm height. You can compare this approximately with the size of a small box of shoes.

PIDbox

The PIDbox has a size of 520 mm width x 140 mm depth x 550 mm height.

PIDbox2

7) If your solar panels are still new, is buying a PIDbox still useful?

Independent tests have shown that after a few months solar panels already suffer from significant losses of efficiency.

Since preventing is better than curing, you better install a PIDbox in time! In this way you prevent PID at an early stage, causing unnecessary efficiency losses and energy expenses. Moreover, the installation of a PIDbox extens the life of your solar panels!

8) What is the difference between solar panels produced before and after 2008?

Solar panels produced before 2008 usually had an inverter with transformer (only existing technology), thereby giving a galvanic isolation between the solar panels and the AC network. New inverters (2008 or later) provide a higher efficiency, but no longer have a transformer. Therefore there is no galvanic isolation, which makes it impossible to ground the cable from the solar panels to the inverter (negative pole).

9) Is it true that the PIDbox has a lifetime of 20 years ? Why is only a legal warranty of two years given ?

When purchasing a PIDbox, we will offer you a guarantee of two years. This device does not need any maintenance and easily has a lifetime of 20 years or more. We offer you the opportunity to choose for an extended warrenty at an additonal cost.

10) Can you show me some references from people who have already bought a PIDbox?

Ilumen is proud of the fact that its PIDbox is sold today in not less than 34 countries. We have given some of our customers the opportunity to share their experience with the purchase of the PIDbox.

11) Why do different PV systems are subjected to different losses of efficiency? Why does the study of Thomas More Hogeschool shows an efficiency gain of less than 2 % for a certain PV system and more than 16 % for another installation?

The fact that one PV system is subjected more to PID than another one can be explained by a difference in influencing factors such as negative voltages, poor or no grounding, unsufficient insulation between the solar cell and the glass,….

The PIDbox regenerates the degradation that is present. In other words: if a degradation of only 2% occurs, only 2% of efficiency can be regenerated. If the efficiency loss is for example 16%, the PIDbox can renegerate up to 16%.

12) Is the PIDbox also compatible with thin film solar panels?

The PIDbox is compatible with all types of solar panels and therefore also with thin film panels. Several of our customers are satisfied to note that the PIDbox increased the efficiency of thin film solar panels affected by PID.

13) What to do when my PIDbox has no LED-signal?

The answer of this question depends on the moment of the day on which there is no LED-signal.

During the day, when the inverter is active, a blue LED-light on the PIDbox should always illuminate. If this is not the case, then there is a problem. Perhaps there is no power from the power supply to the PIDbox. Another possibility is that an internal fault has occurred.

In normal operation, during the night, a red LED-light illuminates. If this is not the case, this does not necessery mean there is a problem. The red LED will light up only in case of certain specific enviromental conditions.

14) My installer claims that my solar panels are not PID sensitive, is this correct?

He is wrong. All solar panels suffer from Potential Induced Degradation.

The PID Calculator of iLumen helps you to check to which extent your solar panels suffer from efficiency losses.

15) Is the PIDbox compatible with micro-inverters?

No, the PIDbox is not compatible with micro-inverters since this arrangement assumes one inverter per solar panel (and not per PV-installation)