Frequently Asked Questions

 

Below is a summary of some of our most frequently asked questions. Can’t find your question here? Please feel free to contact us. We would be happy to assist you!

 

GENERAL:

WHY DENIM?
DENIM is synonymous with reliability, robustness and no-nonsense. We offer a range of solar panels that you can rely on for 25 years without worry. We refer to this as: SIMPLY WORKING HARD!

DEFINITIONS:

WHAT DOES PV MEAN?
PV is the abbreviation for Photo Voltaic and is defined as the direct conversion of light or sunligh into electrical energy.

THE ELECTRICAL ENERGY GENERATED FROM THE SOLAR PANELS IS CONVERTED FROM DIRECT CURRENT (DC) INTO ALTERNATING CURRENT (AC). WHAT DOES THIS MEAN?
DC stands for Direct Current. A direct current is an electrical current with a continuous current direction. Solar panels, as well as accumulators and batteries, are examples of current sources that deliver direct current.

Since electricity distribution for households is via alternating current, the direct current (DC) generated must therefore be converted into alternating current (AC).

AC stands for Alternating Current. An alternating current is an electrical current with a periodically varying current direction. The transformer supplied with the solar energy system converts the direct current into alternating current.

For solar energy, this amounts to approximately 50 g/kWh and, for coal energy, approximately 850 g/kWh. The use of solar energy therefore reduces CO2 emissions.

WHAT DO WP & KWH MEAN?
Wp: Wp stands for ‘Watt peak’. The Wp capacity of a solar panel is the power that the solar panel supplies under Standard Test Conditions (i.e. laboratory conditions). This means under a Spectrum AM of 1.5, cell temperature of 25º C and light radiation of 1000 W/m².

kWh: Apart from the joule, the kilowatt hour (kWh) is the most commonly used unit of energy. One kWh is 1000 Watt for 1 hour, so the energy consumed by half an hour of uninterrupted vacuum cleaning with a 2000W machine is 1 kWh.

THE DENIM RANGE CONSISTS OF POLYCRYSTALLINE SOLAR PANELS. WHAT IS POLYCRYSTALLINE?
Polycrystalline is silicon that consists of several crystals. The crystal structure is sometimes regular and sometimes less regular/not crystallised. One polycrystalline cell has yield of up to ~ 17%. The cells are made from thin slices (wafers) of a block of silicon crystal that is hardened in a mould. The cells are recognisable from the fragmented structure and right angles.

WHAT IS A GRADIENT OR GRADIENT ANGLE?
The angle of a panel’s position in relation to the ground.

WHAT DOES THE TRANSFORMER DO?
The transformer ensures that direct current, generated by the solar panels, is converted into alternating current. Other functions of the transformer are Mpp tracking and the protection of the system.

WHAT IS MPP TRACKING?
MPP stands for Maximum Power Point. This is the operating point (combination of current and voltage) in which the system/panel generates the most power (at a given irradiation and temperature). The MPP Tracker keeps a solar energy installation (despite varying irradiation and temperature) constant at the maximum power point.
 

ABOUT THE SOLAR ENERGY SYSTEM:

HOW DOES A SOLAR ENERGY SYSTEM WORK?
A solar energy system consists of various components:

The solar panels:
Solar panels consist of solar cells. In a solar cell, the energy radiated from sunlight is converted into electrical energy. More light therefore means more energy generated.

The transformer:
Solar panels generate direct current, which is then converted into alternating current by the transformer supplied with the system.

The Kwh meter:
The majority of the energy generated by your DENIM solar panels will be used in your home. The remainder will be supplied back to the electricity network. This is called a ‘grid connection’. Re-supply takes place via a Kwh-meter, which records that re-supply. A rotating disc meter is an example of a kWh meter. The rotating disc meter measures the electrical energy purchased from the network. The more energy thag is used, the faster the disc rotates. Most rotating disc meters can rotate on two sides, which means that the energy that is supplied back to the network is automatically deducted from the amount of electricity purchased.

Network operators are currently in the process of replacing these meters with ‘smart’ meters. These meters are digital and can record the amount of energy purchased and returned and can be read remotely.

Distribution board:
The distribution board controls the distribution of energy purchased and generated between domestic appliances and the electricity network.

The monitoring system:
Many transformer manufacturers now also offer free monitoring. With a monitoring system, you retain control of the performance of your solar energy system in order to protect your long-term investment. Using system-based monitoring, you can always monitor the current status of your system from your PC or via the app.

HOW LONG WILL MY DENIM SOLAR PANEL INSTALLATION LAST?
DENIM Solar panels have an expected service life of more than 25 years. This is reflected in the 25-year power output warranty. We estimate the life of the transformer to be around 15 years.

WILL I SAVE CO2 WITH MY SOLAR ENERGY SYSTEM?
Yes! Energy production releases CO2. The amount of emissions varies depending on the production technology. On average, production releases approximately 500 g/kWh.

HOW SHOULD I CONNECT MY DENIM SOLAR PANELS?
Working with direct current can be dangerous. If you have little or no experience working with direct current wiring or with fuse boxes, we recommend havingthe system installed by a qualified electrotechnical installer. DENIM Solar acceps no liability whatsoever for injury to persons and/or damage to equipment due to installation by unqualified persons.

Looking for an installer near you? Please feel free to contact us. We would be happy to assist you.

 

 

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