What are different types of solar water heating systems?
• Based on collector type: ETC/FPC
• Based on pipe and system pressure: Pressurised/Non pressurised
• Based on system construction material: SS/GI
Evacuated tube collector (ETC) based systems are most common these days and are based on advanced vacuum tube technology. Stainless steel (SS) systems look better and last longer compared to galvanised iron (GI) based systems, however demand 10-15% premium. In dwellings with pressure pumps, pressurised systems need to be installed.
How much litres of hot water will be generated from solar water heating system?
What happens on a cloudy/rainy day? Do I still get hot water?
What are the savings and indicative total payback time of the system?
• North Zone: 1000 kWh per 100 LPD of installed capacity. This means that 300LPD system will save roughly 3000 units of electricity in a calendar year.
• South Zone: 1500 kWh per 100 LPD of installed capacity. This means that 300LPD system will save roughly 4500 units of electricity in a calendar year.
• East Zone: 1000 kWh per 100 LPD of installed capacity. This means that 300LPD system will save roughly 3000 units of electricity in a calendar year.
• West Zone: 1250 kWh per 100 LPD of installed capacity. This means that 300LPD system will save roughly 3750 units of electricity in a calendar year.
This can amount to significant monetary savings. Assuming electricity tariff of Rs. 10 / kWh, the savings can be as high as Rs. 10,000 / year / 100LPD. This means the return on investment can be as low as 2 years. For further details, refer to the schedule of benefits document.
What size of system is sufficient for me?
Application Typical requirement of hot water at 60C in per person per day
Household bathing using buckets 5-20 litres per bath
Household bathing using shower with mixing tap 20-30 litres for regular 10-15 min bath
Shaving with running tap 7-10 litres
Bathing in bath tub 50-75 litres per bath
Wash basin with mixing tap (Hand wash, brushing of teeth wtc.) 3-5 litres
Kitchen washing 2-3 litres
Dishwasher 40-50 litres per cycle
What are indicative maintenance costs for the SWH system?
What are standard warrantees applicable on the product and the expected lifespan of the system?
How do solar panels actually work?
Will my solar panels generate electricity during cloudy, rainy, or snowy days? What about at night?
Similar to how your skin still tans when it’s overcast outside, your solar panels will still generate electricity during cloudy, rainy, or snowy days — they just won’t produce as much energy as they do during clear days.
Solar panels do not generate electricity at night since the sun’s not out. This is when staying connected to the power grid comes in handy as you’ll still have electricity to Netflix and chill.
Do I have to go off the grid when I switch to solar energy?
The thing is, this practice is incredibly expensive and inefficient for most people.
Batteries are not only expensive, they’re not as technically developed as solar panels (read: they clunk up the operation). They also need to be maintained and replaced routinely.
Most solar adopters choose to stay on the grid out of convenience and money-saving.
When you stay connected to the grid, you’ll be able to generate credits with the electric company to lower the price of your bills.
This practice is known as net metering.
What is net metering?
When you switch to solar energy, you’ll have an electric meter that works both ways:
• It will show the utility company how much energy you consume when your solar panels aren’t generating electricity (like at night)
• It will show how much energy your solar panels generated during the day.
Your solar panels will produce a lot of energy during the day when the sun’s the strongest. You most likely won’t use all this solar-generated power. Your excess solar energy will feed back to the grid and help supply power for the utility company.
Your utility company will pay for your solar-generated electricity by giving you credits to lower your monthly electricity bill.
So at the end of the month, you’ll only pay for the net amount of electricity.
How much will I really save on my electricity bills every month?
Most solar providers aim to offset 70–90% of your monthly electricity bill, so that’s a good place to start your calculations.
How will switching to solar energy help me budget better?
When you install solar panels on your property, you’ll be generating more electricity than you use from the utility company at the price of free.
Then you’ll also generate more than enough to sell back to the utility company as credits to further lower your monthly bills. No more surprise electricity bills to tank your budget again.
How soon will I notice a difference in my electricity bills after switching to solar energy?
What is the best option for installing solar panels with my budget?
While you can definitely pay for your solar installation up front, most home and business owners don’t have that kind of cash sitting around.
Go with a solar loan and you’ll be able to finance your own solar system and own it by making monthly payments over time. You’ll enjoy all the benefits of solar energy.
Do solar panels only work in sunny?
Your solar array may not be as effective during an overcast day as it is during a bright day without clouds, but it will still power your home or business.
Are solar panels difficult to maintain?
The most you’ll have to do to maintain your solar panels is make sure they’re free of dust, pollen, leaves, and other debris. Whatever’s obstructing your panels will make for less efficient energy production.
You’ll also need to trim branches that may get in the way of your solar panels and dust off heavy snow. That’s not so hard, right?
Will I ever need to replace my solar panels?
Since solar panels are so easy to maintain and have zero moving parts, they’ll keep generating energy for you home long enough to see a sizable return on your investment.
Will installing solar panels damage my roof?
How long do solar panels take to install? Do you have to rewire my house?
Your solar provider will not have to rewire your house as all the wiring stays exactly the same.
Your new solar system will consist of a few additional parts to your existing electricity system: your solar panels, the inverter, and your new two-way utility meter.
How does solar energy benefit the environment?
What are solar water pumps?
What is the use of solar water pump?
How does solar water pump work?
How is solar water pump more useful than conventional electric pumps?
• Solar water pumps do not require any fuel or electricity to operate. Once installed, solar water pumps do not incur the recurring costs of electricity or fuel.
• Does not get affected by power cuts, low voltage, single phase problems or the motor burning.
• Can be installed in remote areas where electricity is unavailable or diesel is difficult to procure.
• Incurs low maintenance costs as solar water pumps have fewer moving parts as compared to a diesel-powered pump and thus, fewer chances of wear and tear.
• No lubricants are required for operation and hence no chances of water/soil contamination due to the lubricants.
• Easy to operate
What are the different types of solar water pumps?
Submersible pump: As the name suggests, a submersible pump is located deep below the ground level and remains submerged under water. The suction head of the submersible pump is beyond a depth of 10 metres. The installation of these pumps is done by digging a bore well, which leads to an increase in its installation and maintenance cost.
Surface pump: The surface pumps remains out of water and in the open. They are installed where the water table is within a depth of 10 metres. As they need to be on the surface, these pumps are easier to install and maintain. They are, however, not apt for deep water table.
DC pump: This pump runs on a motor which operates on direct current, therefore no battery or inverter is needed in this type of pump.
AC pump: The motor of this pump operates on alternating current, which means the direct current produced by the solar panels gets converted to AC using the inverter. The conversion from DC to AC leads to loss of power from generation and consumption.
Are there any criteria for selecting where to install the solar water pump sets?
The pumps should be located close to the solar panels but within the area to be irrigated. The suction lift for the pump should be low. If there are multiple water sources, the source with the highest water table should be chosen for placing the pump.
How much area can a system irrigate?
Does solar water pump work during cloudy and foggy days?
Can hail storm or lighting lead to the damage of the panels? What precautions should be taken during cyclones/storms to save the panels?
During a storm or a cyclone, the panel gets damaged only if the surface on which it is mounted collapses. In areas prone to cyclones and storms, special consideration should be given to building strong foundations for the installation of a fixed panel. Also, as a precaution during storms or cyclones, the array should be kept horizontally at 180 degrees so that minimum resistance is offered to the wind.
What maintenance is required for a solar powered pump? Does the performance of the solar water pumps get affected over the years of use?
In comparison to diesel pumps, solar water pumps have a significantly longer life expectancy and continue to produce electricity for even longer than 25 years.