Leadsun FAQs

What is a solar LED street light

Solar LED street lights are lights made of a crystalline silicon PV panel (power supply), smart controller, lithium or lead-acid battery (stock power), higher LED source and other components. A special PIR sensor can provide smart control capabilities or multi-function extension.

How do traditional light sources and LED light sources compare?

LED lights are 30-50% more efficient than most traditional street lights.

What are the advantages of the all-in-one solar street light?

The all-in-one solar street light features a more efficient mono PV panel, long lifespan LiFePO4 lithium battery, brighter brand LED, smart controller and PIR sensor in one cabinet. The AE Series is easy to install—it takes two workers only five minutes to finish installation and no heavy equipment is required.

What is the evaluation index of roadway illumination?

1. Car lane: average illumination, illumination uniformity and lengthways uniformity, glare limit, surround ratio and inductivity
2. Sidewalk: average illumination, mix illumination and vertical illumination

How do solar PV panels work?

PV Panels are made of a semiconductor material like silicon, along with phosphorous and boron which create conductivity within the cell and activate the movement of electrons. When activated by the sunlight’s energy, the electrons move across the cell and into the electrical circuit attached to the solar panel.

How much shading is too much for solar photovoltaic panels?

Shading a photovoltaic system dramatically decreases its output. Just shading the bottom row of wafers alone amounts to an 80% reduction in efficiency.

How much maintenance do PV panels require?

Solar photovoltaic panels require little maintenance—no washing or dusting is required. It is, however, important to place panels where they will remain relatively clear of shade and large debris.

Do I need to have southern exposure to have a PV panel?

Although southern exposure increases the effectiveness of a residential solar power system, your home may still work for solar power without having south-facing exposure. Seek advice from a professional solar designer or installer to ensure success.

What are LEDs?

LEDs are light-emitting diodes, or electronic components that produce light by converting electrical energy directly to light by the movement of electrons within the material of the diode. Because LEDs are highly efficient, they are beginning to replace most conventional light sources.

Why is LED technology called solid-state lighting?

The term solid-state lighting is used because the electronics produce light directly from solid materials in which the electrons are embedded. This is unlike other technologies; for example, fluorescent technology requires a gaseous discharge medium to initiate production of light.

What makes LEDs more robust than other light sources?

LEDs have no gases, filaments or other moving parts. They provide light through a one-step process that takes place within the diode. You don’t have to worry about broken glass or other parts breaking or coming loose.

What are the advantages of switching to LED?

LEDs have no gases, filaments or other moving parts. They provide light through a one-step process that takes place within the diode. You don’t have to worry about broken glass or other parts breaking or coming loose.

What is a controller?

Controllers are very important for solar street lights because they can remotely turn lights on or off. Some modern controllers are programmable so the user can decide the appropriate amounts of charging, lighting and dimming.

What type of controller should I use with high voltage panels?

The only way to get full power out of high voltage grid tie solar panels is to use an MPPT controller. Since most MPPT controls can take up to 150 volts DC (some can go up to 600 VDC) on the solar panel input side, you can often series two or more of the high voltage panels to reduce wire losses or use smaller wires. With the 175-watt panel mentioned above, putting two of them in a series would give you 66 volts at 7.6 amps into the MPPT controller, but the controller would convert that to about 29 amps at 12 volts.

What type of battery do these lights use?

A lithium-ion battery is a rechargeable battery in which lithium ions move from the negative electrode to the positive electrode during discharge and back when charging.

How long does the battery last?

Normally five to eight years. If you are using double batteries interactively, they would have an even longer life.

What are the installation requirements?

1. Protect the PV panel from sharp/hard objects
2. Clean the PV panel to maintain its conversion efficiency
3. Avoid sheltering or shading the PV panel
4. Make sure the PV panel faces the sun in order to absorb maximum energy

Is it easy to maintain the all-in-one solar street light?

The all-in-one design with modular structure is easy to check, maintain, and replace as necessary.

Solarwhiz FAQs

Can you tell me how much air each type of Solar Whiz ventilators are able to move compared to a Whirlybird working at capacity?

The different Solar Whiz roof ventilation fan units are capable of moving 10-30 times the amount of air that a Whirlybird moves – depending on the type of Whirlybird. An average Whirlybird moves around 100cbm/hr. The SW-RAF1400 is capable of doing 10-15 times that amount. The SW-RAF2100 has a capacity of 2100cbm/hr – about 50% more air than the SW-RAF1400. 

What size Solar Whiz do I need?

It depends on the size of roof space of your home. The SW1400 will provide enough ventilation for a standard pitched home up to around 16 squares or 150 square meters. The SW-RAF1400 would be suitable for those who want extra power and improved results or people with larger homes up to about 25 squares or about 225 square metres. The more powerful SW-RAF2100 is suitable for extra large homes up to about 33 squares or 300 square meters – it is also ideal for commercial applications where huge amounts of air need to be moved.  For example warehouses, office buildings, sheds, stables etc.

How noisy is the fan of the Solar Whiz ventilators?

The noise of the roof ventilation fans pretty much compares to the fan of a refrigerator (50dBA) but will be on the roof of your house!  The SW-RAF1400 runs at less than 40dBA, SW2100 runs at less than 45dBA and SW_RAF2100 runs at less than 50dBA.  

Is the gable end unit mounted at the end of the house in the wall towards the apex instead of on the roof? What models are available and what is their capacity?

Yes, that is what the gable end unit is designed for.  Three models are available – SW1400G, SW2100G and SW3000G.  The air moving capacity is the same as the roof mounted Solar Whiz units (see question 1 and 2).

Can the Solar Whiz gable model be used for ventilating sub floor areas?

The Solar Whiz Gable model is ideal for sub-floor ventilation.  They are ideal as they only run when the sun is shining – which means you will generally only be drawing relatively warm and dry replacement air into your sub floor area.  You may need a longer cable to power the unit via the external PV panel, which probably will be placed on the roof or other good North facing position. 

How big an area/roof space does the Solar Whiz ventilate?

In order to keep the temperature in your roof space as close to the outside ambient as possible, GES recommends that a minimum of 3-4 air changes per hour are needed. To facilitate these air changes, eave vents (or other openings) are required to allow replacement air to flow into the roof space. The vents will help to minimise the amount of resistance encountered by the air, but resistance does need to be factored in when considering what sized unit is required. Considering this, GES provides the following guidelines:SW-RAF900 for areas up to 150 square meters SW-RAF1400 for areas up to 225 square meters SW-RAF2100 for areas up to 300 square meters 

Can the Solar Whiz ventilators be used at night?

At its basic level, the Solar Whiz ventilors will operate whenever the sun shines. However, we have developed a night operation system operating on a relay that will switch between powering the unit from the sun and a 12 volt power supply when the sun goes down. The system will automatically switch back to PV power when there is sufficient sun to run the fan. It is important to note that this system requires a power point in the roof space.

Can you over-ventilate your roof space?

No! In general terms the more air changes the better and the closer you get to the temperature of the replacement air (ambient). Lower temperatures in your roof space, translates into lower temperatures in your home. Remember a Solar Whiz has the option of being thermostatically controlled and may therefore be turned off in the cooler months to avoid reducing temperatures in the roof space in the colder months.

What is the difference between an intake and exhaust vent?

The most important difference between an intake and exhaust vent is their location on the roof. All exhaust type ventilators are to be installed on the upper 1/3 portion of the roof space. Intake vents are generally installed in the under-eave/ overhang or fascia area.  Ask us about the type of eave vents we recommend complementing your Solar Whiz installation!

Can I install Solar Whiz ventilators on my shed/workshop etc.?

Absolutely! Tin and other varieties of sheds can get extremely hot in the summer months making them very uncomfortable to work in. The Solar Whiz is a great, cost effective way to keep a shed or workshop cool! As the Solar Whiz ventilator fan is completely solar operated, a unit can be installed in sheds with no electricity available.

Why is passive ventilation not enough?

By the time passive ventilation kicks in – the roof space is already too hot. Solar Whiz ventilation solutions start working as soon as the sun shines, preventing your roof space from reaching high temperatures in the first place. As previously mentioned, the Solar Whiz is capable of moving a lot more air than your standard Whirlybirds. As far as other roof extractors at comparable prices go the Solar Whiz is a class leader.

What are your product warranties?

The Solar Whiz has a 10 year warranty on its PV panel and 2 years on
all other components. A full Warranty statement with terms and
conditions can be found on the Solar Whiz or Global Eco &
Environmental Solutions Website.

How difficult is it to install a Solar Whiz?

Installing a Solar Whiz is pretty straight forward for a competent handyman or a professional installer. It is therefore possible to do the installation yourself and we are happy to provide installation instructions and advice.  Most Solar Whiz units are installed by our dealers/installers. DIY Installation instructions can be found here.

Does the Solar Whiz turn off in winter? Can I install a thermostat?

The Solar Whiz will operate when it is powered by the sun!  To ensure it does not work during the cooler winter months we recommend installing a thermostat which can be used to set the unit in a way in so that it doesn’t operate during winter. Provided you don’t have moisture issues in the roof space (many houses do), you will want to keep as much heat in your roof space as possible during the colder months to minimise heat loss. 

Where are Solar Whiz products produced?

Solar Whiz is designed in Australia by Global Eco & Environmental Solutions (GES Pty Ltd) and developed and manufactured in cooperation with our Chinese partner.

Do Solar Whiz ventilators still work in the rain?

YES Solar Whiz roof ventilators will still work in the rain – if it is not too dark! The Solar Whiz will run slower in overcast or cloudy weather –even if it is raining, but it will still run at a speed high enough to continue venting your roof space all day long. To illustrate how the Solar Whiz works in rainy conditions please have a look at the below video.

Why are ceiling/eave vents important?

There are two main purposes for the ceiling vents – one is to provide replacement air for the Solar Whiz units to enable them to extract hot air out the roof space, which can’t happen without access to replacement air, but the other function is to remove the hot air that accumulates in the upstairs rooms – which is why we recommend to put ceiling vents in hot the rooms, particularly if you live in a double storey house.