Frequently Asked Questions

General questions

Does Surya Power Company provide all the components, installation as well as the maintenance?

Yes, Surya Power Company is a one stop shop for all your solar energy needs, we provide complete turn-key power solutions.

Can I use this system to heat water?

No, we do not suggest you to use this system to heat water as this is energy exhaustive.

What are the running costs of the system? Is it too expensive?

Solar System is a onetime investment, after the installation there is no running cost for electricity generation.

How does the system work in rainy days?

Refer to question number 7. As mentioned earlier, battery acts as back up during these times and cater for your energy needs. Nepal has on average of 315 days of sunshine days. That means you just have to plan for the remaining 50 days and there's the battery of the system to take care of this.

What about the days when the sun doesn't shine or shines less like in winter season? Will the system still work?

As the system is dependent on sun light for the generation of electricity, lesser sun shine hours means lesser electricity generation. However, the battery provided with the system will act as a backup for power and this will cover you for your energy needs for some time provided if it is used properly without fully draining the power it has stored. Nepal has on average 4.5 hours of full sunshine everyday and this is enough for generation of electric power by the solar power system.

How long is the system useful for?

We follow manufacturer's warranty which is typically 25 years for solar PV panels and 2 years for battery. Also, we provide one year free services for installation and maintenance.

What direction facing roof do I need for maximum efficiency?

For maximum efficiency, we recommend placing the panels facing South. However, one of our experts in designing will help you design the system to ensure maximum efficiency.

What direction facing roof do I need for maximum efficiency?

Yes, there are subsidies available offered from the Government of Nepal these are only for the households in the rural areas and not in urban areas like Kathmandu.

Are there are grants/subsidies available?

Yes, there are subsidies available offered from the Government of Nepal these are only for the households in the rural areas and not in urban areas like Kathmandu.

Can I save money in electricity using this solar system?

Yes, you can save money on electricity bills if you use the system independently and not as a hybrid system.

How much does it cost to install a solar system?

Cost of the system depends on the electric appliances you want to use. We provide free energy audit of your house and businesses with the state-of-the-art device and provide you with the best solution.


I need a system to power a fridge, TV, lights, computer, and a water pump. Not all the equipment will be on all the time, but the fridge and some lights must be on. How much will it cost ?

The size of the system increases as you increase the number of electrical appliances you would like to use.


Solar Information

What is Solar Energy?

Solar energy is radiant energy that is produced by the sun. Every day the sun radiates, or sends out, an enormous amount of energy. The sun radiates more energy in one second than people have used since the beginning of time!


Where does the energy come from that constantly radiates from the sun?

It comes from within the sun itself. Like other stars, the sun is a big ball of gases-mostly hydrogen and helium atoms. The hydrogen atoms in the sun's core combine to form helium and generate energy in a process called nuclear fusion.

During nuclear fusion, the sun's extremely high pressure and temperature cause hydrogen atoms to come apart and their nuclei (the central cores of the atoms) to fuse or combine. Four hydrogen nuclei fuse to become one helium atom. But the helium atom contains less mass than the four hydrogen atoms that fused. Some matter is lost during nuclear fusion. The lost matter is emitted into space as radiant energy. It takes millions of years for the energy in the sun's core to make its way to the solar surface, and then just a little over eight minutes to travel the 93 million miles to earth. The solar energy travels to the earth at a speed of 186,000 miles per second, the speed of light. It is estimated only one part in two billion of the sun's radiated energy strikes the earth.

How does the nature use solar energy?

Plants make food - photosynthesis.
Earth absorbs the heat - we get a warm comfortable weather.
Ocean absorbs the heat to evaporate water which falls as rain later.

What are other uses of solar energy?
  • Solar heater
    Traditionally, Nepal is one been one of the forefront in installing simple solar hot water systems. It works as a simple means by putting water in the pipe and letting the water heat the water during the day and use the heated water for shower, washing or cooking.
  • Photovoltaic cells
    The radiant energy is converted to electricity. The word comes from Photo (light ) and Volts ( a unit of electricity potential). The energy can be harnessed to produce electricity. These can be used at day time - feed into the national net-work to act as a power plant or can be stored via batteries and provide electricity when needed.
How many types of panel are there?

Currently there are three type of PV panel in the market place:

  • Monocrystalline Solar Panels:
    Monocrystalline solar panels are made from a large crystal of silicon. These type of solar panels are the most efficient as in absorbing sunlight and converting it into electricity, however they are the most expensive. They do somewhat better in lower light conditions then the other types of solar panels.
  • Polycrystalline Solar Panels:
    Polycrystalline solar panels are the most common type of solar panels on the market today. They look a lot like shattered glass. They are slightly less efficient then the monocrystalline solar panels.
  • Amorphous Solar Panels:
    Amorphous solar panels consist of a thin-like film made from molten silicon that is spread directly across large plates of stainless steel or similar material. These types of solar panels have lower efficiency then the other two types of solar panels. One advantage of amorphous solar panels over the other two is that they are shadow protected. That means that the solar panel continues to charge while part of the solar panel cells are in a shadow. These work great on boats and other types of transportation.
How can I reduce my electricity bill/usages?
  1. Use energy efficient appliances eg CFL bulbs, start with the bigger appliance first they consume more.
  2. If you use heaters/ air-conditioning unit , check on the insulation. Make them better and air tight. If needed put a double glass on the window. The cost of these improvements is far less than the energy you will have to make up for the heat/cold loss. If you use fans, make sure that there is plenty of places for air flow and try to make double ventilations.
  3. Switch lights/ TV/ Computer monitor on only when needed - switch them off when there is no one in the room or you are not using it.
  4. Heat water only when needed. Heaters are one of the biggest contributor to electricity charges.
  5. Use water from ground tank instead of using the water that has been pumped up to the roof tank.
How many panels should I have?

For urban Nepal, we are looking at off grid applications. We are looking at only back up power. You need to decide which things you still need when there is no city electricity. For things like running the water pump, these can be done when city electricity is there and you need not plan these for the solar. You need to decide what kind of investment you want to make in solar.

Work on a system that you can afford and can make your life comfortable - be realistic. Only target the watt you need to run your system:

Some of key things you need to consider are:

  1. Light: the most important thing, change to CFL bulbs as soon as possible - these save energy.
    • How many lights do you need?
    • What is the watt on each bulb?
    • How many hours will these be in operation per day?
  2. TV:
    • How many TV will you be running?
    • What is the watt on each TV?
    • How many hours will these be in operation per day
  3. Computer:
    • How many computers will you be running?
    • What is the watt on each computer?
    • How many hours will these be in operation per day?
  4. Back up power:
    • How much back up power do you need?
    • How frequently do you need the back up power?
    • How critical are these back up power?

Since solar power installation is not that cheap , we recommend you sit down with our experts and decide on how much you want to spend.

What is net metering?

Net metering is the process through which you attain a “dual-benefit “by installing a solar power plant on the roof, open space, walls of the building to generate electricity. Generated power is first used in the building as per the requirement and the surplus power is fed to the grid of utility.

Do you know the Dual Benefit?

A bi-directional meter is installed in the supply line to register import and export of power. Net metering arrangements, thus, combine elements of captive power consumption and exchange of power with the utility. The bill is issued by utility after adjustment of import and export of power.


How does it work?

·       Under Net Metering policy electric customers generate their own electricity from a solar photovoltaic (PV) system installed on the roof top of the building. The output of the panels (DC electricity) is connected to the power conditioning unit / inverter which converts DC Power to AC Power.

·       The inverter output is connected to the control panel / distribution board of the building to utilize the power.

·       The inverter synchronizes with the grid to power the loads with preference of consuming solar power first.

·       The power generated in excess of the owner’s electricity consumption is fed into the grid through a bi-directional energy meter capable of registering both import and export of electricity.

·       The arrangement of a net metering system utilizes the same service line for excess power injection into the grid which is already being used by the consumer for drawl of power from utility network.

·       Net-Metering allows households to generate electricity and set off the power produced against the power used from the grid and consumer pays only for the “net” number of units (difference between import and export energy) used each month.

·       In the event the consumer produces power in excess of his usage in a particular month, the customer’s energy charge becomes zero and the remaining units are credited and carried forward to the following month.

Advantage from Net Metering:

Individual Benefits:-

·       Net metering allows you to get full retail value for the electricity you produce by permitting you to put any excess electricity you generate back in to the electric grid and retrieve it later, free of charge.

·       Net Metering accurately captures energy generated and consumed, 

·       Reduced pressure on the local electricity grid.

·       Increased local energy Independence.

·       Increased property Values.

·       Reduced peak power demands.

·       Increased in-country electricity generation.

·       More Visible indicators of community support for clean energy

·       National/Regional Economic Growth.

·       No Battery storage system needed  (But provision but battery backup during loadshedding)

·       Solar Power produced in winter saves on summer costs. (Monthly carry-on of value of generated electricity)

·       No – Maintenance required- Solar Power without hassles.

Environmental Benefits:-

·       Generation of Environment friendly, clean energy

·       Reduces carbon (CO2) emissions

·       No pollution healthy Environment.

·       Helps in controlling Global Warming

·       Saving of fossils fuels

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