• Stop work during stormy weather. Solar modules can be caught in the wind, causing you to fall.
• Never step or sit on the glass surface of a solar module. The glass may break, resulting in shock or bodily injury. The module may also stop generating power.
• Always use the supplied parts to attach the solar modules and mounts. Use of weaker parts, such as screws that are too short, is dangerous and may cause the solar modules or mounts to fall.
• Always use the specified tools. The solar modules or mounts may fall if the installation is not strong enough, for example when parts are not tightened sufficiently.
• Regardless of whether you are working on a new or existing roof, never allow the sheathing to become wet. Protect the sheathing from rain during the installation. Failure to do so may cause leaks.
• Always use the specified materials. Use of other materials is dangerous. Materials other than specified can reduce performance and can cause leaks, shock, and so on.
• Do not modify or cut parts.
• Do not install system in a location within 0.3 miles from the ocean or any salt water.
• Do not install in corrosive locations

TArtificially concentrated sunlight shall not be directed on the module. “Rated electrical characteristics are within 10 percent of measured values at Standard Test Conditions of: 1000 W/m2, 25°C cell temperature.

Under normal conditions, a photovoltaic module may experience conditions that produce more current and/or voltage than reported at Standard Test Conditions. Accordingly, the values of ISC and VOC marked, modules should be multiplied by a factor of 1.25 when determining component voltage ratings, conductor capacities, fuse sizes and size of controls connected to the module output for an additional multiplying factor of 1.25 which may be applicable.

Wiring methods should be in accordance with the National Electric Code. Install wires and cables with appropriate hardware in accordance with applicable electrical codes. Protective earth grounding of the individual photovoltaic modules is achieved by securing the modules to the Mounting frames. The assembly instructions should be closely followed, in order to ensure a reliable ground connection.

Do not drill holes in frame. Do not cut or modify parts or rails.

Work under dry conditions with dry tools.

Do not stand or step on solar module.

Do not install near flammable gases.

Do not drop or allow objects to fall onto module.

Completely cover solar module with opaque materials when wiring to halt production of electricity.

Keep the back side of solar module surfaces free of foreign objects.

Do not use chemicals on solar modules when cleaning.

Do not wear metallic jewelry, which may cause electrical shock.

Do not touch cable electrical contacts.

Do not expose solar modules to sunlight that is concentrated with mirrors, lenses or similar means.

Consult local codes and other applicable laws and statutes

concerning required permits and regulations concerning installation and inspection requirements.

Install solar modules and systems according to applicable codes. Product should be installed and maintained by qualified personnel. Keep unauthorized personnel away from solar modules.

Avoid shadowing cells in order to prevent solar module hot spots and/or reduction in power.

Avoid installing modules and mounting system in high corrosion areas.

Choose a safe spot to anchor ladders and stepladders.

Always work with a partner. One person should hold the ladder steady.

Do not drop or allow objects to fall onto module.

Ladders from a first-story roof to a second-story roof are very dangerous. Do not set up a ladder on a roof. When there is no other choice, straddle the ridge and lay down a rubber anchor mat, and secure the ladder to the mat. Always have one person hold the ladder firmly.

When you use a two-stage ladder, secure it with ropes or stay to prevent it from sliding sideways, and have two persons hold the ladder steady.

Use ladders with steps broad enough to permit safe work.

When working in high places, wear harnesses and Use scaffolding.

When working at heights of 6 ft or more, use scaffolds or other equipment to ensure a stable Work platform.

Scaffolds should be designed and erected by a qualified person.

When it is difficult to erect a stable work platform, install safety nets, wear harnesses, and take other measures to prevent falls.

Regulations mandate the use of harnesses. Fasten harnesses securely, and check that the length of lifelines is 6 ft or less.

Attach the primary support line securely to a metal fixture installed for that purpose on a ridge or beam.

When objects are thrown down from a height of 6 ft or more, appoint a surveillance person on the ground and warn others about falling objects.

Do not allow third parties to enter the work area during construction.

Arrange tools and materials neatly and secure them with ropes, or use bags or other measures to prevent falling objects.

When there are electric power lines near the roof or eaves, request the power utility to take advance measures to prevent shock.

Check the health of workers before starting work.

Lift packaged modules by grasping both sides of the package. Do not lift by grasping the band, as the band can break.

Never step or sit on the glass surface of a solar module.

The electrical aspects for most installers are known by heart. Nowadays very important is the knowledge and experience about solid, high-quality PV material, which you are working with. And that is difficult to recognize from the PV module data sheets.

The problem with comparing providers is, that world-wide there are around 400 manufacturers of photovoltaic modules. In the wake of the economic crisis, bankruptcies and lost guarantees, the important is you work with the well-known and most major manufacturer in the photovoltaic sector, to avoid the risk at least as much as possible.

Made in China? The claim, that the Chinese photovoltaic modules have a poor quality, compared to PV modules from European manufacturers is already past. The price differences are obvious and result from the production cost structure and support programs. Generally is underestimated, how strongly and exemplary the Chinese government supports its own industry of renewable technology. That's why in case of well known and major Chinese manufacturers, the price-performance ratio may be attractive.

Mismatching means the losses on PV power, mainly within series connected PV modules. Ever bigger the number of installed modules (PV power), the more important is the mismatching-problem. The reason of mismatching can be different performance of an individual module, within the same models of modules. In all modules, connected in series, should flow the same current. But the worst performing module, within the series (string), will impair the power of all other connected PV modules (similar like in: blocked garden hose effect). Are there strong variations in performance, the powerful PV modules can not transfer her best performance. When mismatching PV modules present, it is important to connect modules with low power distribution in a separate PV string or at the beginning of the PV string (-). Quality manufacturer sort out, the modules with mismatching performance. Sorting can also take place individually by the installer, by the current (A) of the modules listed in the flash-list. Other mismatching losses can results from different operating conditions, such different module inclination, orientation or partial shade within the PV string.

Take extreme care for battery connection

Connect battery series or parallel with system requirement

Do not short circuit

Keep in dry place, prevent over heating.

Photovoltaic modules and inverters represent the most expensive part of the whole PV system, and protection is focused above all on these components. Failure or in extreme case, destruction can be caused by atmospheric or switching over voltages. Another potential source of failure is short-circuit of part of the electrical circuit, which can result in overload of certain parts up to their eventual destruction or possibly even in fire. For this reason especial attention is paid to devices from a proven manufacturer.