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The electric energy is obtained by the solar-cells during daylight and is stored in the energy storage device (battery). The stored energy is then used for the lighting during the night. The battery is installed within the light pole. A programmable microcontroller monitors the charging condition of the battery.

Solar lights offer three main advantages:

• Economic efficiency
• No cabling
• Eco-friendliness

Solar lights generate environment-friendly energy and assure an independent and continuous power supply. In numerous locations solar lights definitely offer a contemporary, economical, resource- and environment-friendly alternative to conventional exterior lighting systems. Furthermore a substantial contribution to climate protection is made. During the life expectancy of each hei solar light™, remarkable 2 tons of CO2-emissions are avoided. hei solar light™ guarantees minimal planning efforts and a simple and trouble-free installation.

The product family hei solar light™ offers unrivaled advantages as far as functionality and design is concerned. The photovoltaics are perfectly integrated into the solar light allowing an outstanding and forward-looking design. A highly modern battery- and a high-efficiency LED-technology guarantee unique functionality and operation reliability even in winter and during longer periods of bad weather conditions.

The exceptional advantages of hei solar light™ are as follows:

• a patented photovoltaic-module-technology
• innovative design
• the intelligent electronic system assures high reliability in operation even during winter and longer periods of bad weather conditions
• highly efficient LED-technology and powerful photovoltaics provide extraordinary high illuminance

hei solar light™ operates trouble-free especially in Central Europe and in southern regions. hei solar light™ perfectly suits the requirements of:

• streets in housing areas
• pavements, bicycle paths
• squares, promenades
• green areas
• pedestrian areas
• bus and tram stops
• driveways to houses and garages
• gardens
• hotel complexes
• shopping centers
• exhibition centers
• industrial plants
• golf courses
• swimming pools
• sports facilities
• amusement parks
• alpine regions
• emergency lighting systems (escape routes for exteriors, etc.)

hei solar light™ is dependent on the presence of sunlight, which means that locations providing very poor lighting conditions (e.g. locations underneath bridges, in deep forests or in extremely shaded areas) are not suitable. In the global sunbelt with sufficient sunlight even during winter, the solar light can indeed be used for high-ranking road networks, highways and intersections.

hei solar light™ is equipped with high-efficiency LEDs providing a power of 12 to 80 Watt. The remarkable light output of the LED-luminaires (up to 14,800 Lumen) equates to a conventional light bulb with 1,500 Watt.

hei solar light™ is provided with a powerful energy storage device and an intelligent electronic system. After days with no or barely any sunlight the programmable microcontroller dims the brightness in order to reduce the energy consumption and to assure a trouble-free operation. Thereby longer periods of bad weather conditions without direct sunlight of up to 10 consecutive days can be easily bypassed.

The more sunlight the better. In order to guarantee a trouble-free operation, the solar light should have at least 2 to 4 hours of direct sunlight on average per day.

Yes, admittedly with constraints. The solar light must not be positioned in the shade for the entire day (an installation at the north side of a house is not advisable). Partial shading is definitely no problem. The brightness of the solar light is adjusted to the insolation of the specific location, which means the brightness is accordingly dimed during the night. As a guideline and depending on the geographical location, the solar light should have at least 2 to 4 hours of direct sunlight on average each day.

During longer periods of bad weather conditions (resulting in a poor charging condition of the battery) hei solar light™ switches to the energy-saving mode. That means, the brightness of the light is dimed and adjusted to the charging condition. Therewith a trouble-free operation during longer periods of bad weather conditions is guaranteed. In this case the solar light works reliably under dimed illuminance. The regulation of the solar light and of the energy management is monitored by a microcontroller, built in the light pole.

Yes indeed! The installation of hei solar light™ in numerous locations guarantees a tremendous cost-effective alternative to conventional lighting solutions, due to comparative calculations. hei solar light™ reduces electricity costs and no costs for cabling and rearrangement of surfaces are necessary. Due to the long life expectancy of the LEDs, minimal maintenance costs arise.

hei solar light™ offers a wide range of benefits for the customer. This solar light is highly economical due to the reduction of electricity costs and worldwide outstanding in terms of the unique and trend-setting eco-design. hei solar light™ is self-sufficient and therefore offers an attractive alternative for lighting systems in locations, where no power supply is provided.

The installation of hei solar lightTM assures a substantial reduction in operating and maintenance costs. The illuminant is arranged closely and requires no regular servicing (cleaning of the interior for example). The LEDs provide a very long life expectancy. Furthermore LEDs hardly emit any UV-light, therefore do not attract insects. A battery is used as energy storage device, which has to be replaced every 3 to 5 years (according to the supplier's specification).

LEDs rank among the most economical illuminants. The high-efficiency hei power leds provide an extremely long life expectancy and a high light yield resulting in minimised maintenance works. Furthermore LEDs hardly emit any UV-light, therefore do not attract insects resulting in minimal cleaning services.

Yes indeed! LEDs are very reliable in operation and provide an extremely long life expectancy. The first LEDs were developed in the 1960s and have been under permanent further development ever since. The light yield of the LEDs today amounts to 100 Lumen/Watt and more. For the HEI Eco Technology™ LED installed in the products we reach a light efficiency between 118 and 136 lm/w.

The high-quality constituent parts of hei solar light™ guarantee a trouble-free operation. As manufacturer we guarantee an operation of 20 years for our hei power tube.

An assortment of reference projects can be found on our reference page.