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Solar Roof Top System

Solar Water Heater

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Solar Home Inverter

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Solar DC System

Why to get installed solar power plant?

Solar energy is clean, renewable energy production. India is blessed with 300 days of clear sunshine. Solar fixes the energy costs, avoiding utility rate increases. The life of a solar power plant feature a 25 year output warranty.
This system will produce free andreliable electricity for decades.

Types of Solar System

Grid – Tied system

An ON-grid-connected solar power plant (or photovoltaic power system or gridconnected PV power system or On-Grid solar power plant) is electricity generating solar PV power system that is connected to the state power grid in parallel.

Off-Grid system

In this type of system, battery backup or diesel generator is present. The system works independent of the conventional grid. Using the inverter, the battery backup powers the load during night and cloudy days.

How does a grid-tied system work ?

There are two basic components:.

Solar Panels : One to Hundreds of kilowatts of solar panels, typically mounted on unused south facing roof space.

Inverter : Converts solar energy (DC) in AC to match utility power. Inverter output is connected to the Grid Panel.(Distribution Box). Priority is set for Solar Power & then for
Grid Supply. So your maximum utilization of energy will be from Solar System.

How is the net metering done?

In order to get a net metering connection, the local utility company has to review and approve the solar project.
Once that the project is approved, they provide an updated bi-directional meter which has to be fitted into the main grid. This new meter is able to calculate net metering, while observing the electricity flows from both the solar system and the electricity utility into the customer’s establishment.
The time required for obtaining utility permissions is approximately 15 days.

What is Net metering?
It reduces the electricity bill by providing power to the home loads in parallel with grid.
Unlike traditional solar power plant or stand-alone power systems (or OFF-Grid Solar power plant), a grid-connected system doesn’t includes a batteries.no maintenance is required.
On-Grid inverters converts direct current (DC) generated by solar panel, voltage to alternating current (AC) voltage and that can operate in parallel with the electric utility grid.
During day time, when the house electrical load is much lower than the power generated by grid connected solar power plant, the excess power gets exported to the utility grid.
During night, when there is no power generation from solar system, it imports electricity from grid without any disturbance to load. The electricity billing is based on the net consumption of the electricity units. (Net units= Imported Units – Exported Units of electricity).
With On-Grid Solar Power Plant anyone can make huge saving on electricity bills.

Is any internal house wiring alteration required to install the solar system?

No. Any kind of alteration is not required in existing house internal wiring to install the solar system.
A net meter will installed in place of existing normal meter and a solargeneration meter will be install additionally.

What does happen in rainy season and in night time?

Solar energy does vary throughout the year. In practice, grid-tie system owners don’t usually worry as rainy season months have low production.
We calculate annual energyproduction estimate on 300 sunny days. Solar Grid Tied System will not work in the night because Solar Modules need sunlight to produce power.

Do the solar system installation require any specific type of roof?

No. Solar system can be installed on any type of roof (concrete slab, cement sheets, metal sheets, Manglore tiles etc.).
The only requirement is that the roof should be shadow free.

How much is the space required to install the solar system?

About 100 Sq. ft area is required per kW.
It means 200 Sq. ft area is required for 2kW system.

What is the maintenance required to keep the system in good condition?

You don’t need to do much to maintain the system in good condition.
The solar system uses Photovoltaic (PV) cells, which are very robust and low-maintenance.
We recommend a monthly cleaning of the panels.

4

What are the available subsidies ?

Residential consumers: Currently, consumer could be eligible upto 30% subsidy from central government.
Approval of subsidy comes with mandate of using MNRE approved Indian and/or value segment panel and inverters with limited quality options.
Inaddition, subsidy approval and disbursement process is frictionful and requires extensive paper work.

Commercial consumers: Subsidy is not applicable. Accelerated Depreciation (AD) related tax benefits are applicable and we will be happy assist with the processes.

4

What is the payback period of the solar system?

The payback period depends upon the unit rate (Rs./kWh) of the power consumed. However, approximately it varies from 3 to 5 years. After payback period of 3 to 5 years, you will get the electricity totally free of cost for the remaining life of the system.

4

How much is the saving potential in installing solar system?

As we know in India, the electricity tariff rates get hiked by approx. 4% per year.
Considering this hike the cost of electricity will be very high.
But, when you install solar system, with one-time initial charges, you will get the electricity with very low cost throughout the life of the system (25 years).
The difference between electricity company charges and solar systems charges, is the huge savings.

4

What are the available payment options to install the solar system ?

ollowing are the payment options to purchase and install the solar system:

i. Self-managed amount
ii. Bank loan @home loan rates from PSU banks
iii. Easy installments of 6 months or 12 months for solar systems upto 2 kW
iv. Pay as you go.

ABOUT SOLAR WATER HEATER

What is Solar Water Heater

A Solar Water Heater is a device which provides hot water for bathing, washing, cleaning, etc. using solar energy. It is generally installed at the terrace or where sunlight is available and heats water during day time which is stored in an insulated storage tank for use when required including mornings.

How does it work?

A Solar Water Heater comprises of an array of solar collectors to collect solar energy and an insulated tank to store hot water. Both are connected to each other. During the day time, water in solar collectors gets heated which is either pumped or flown automatically on thermosyphon principle to the storage tank. Hot water then stored in the tank can be used for various applications.

What are different types of Solar Water Heaters?

Two types of Solar Water Heaters are available; one based on flat plate collectors and the other based on evacuated tube collectors. Flat plate collector (FPC) based systems are of metallic type and have longer life as compared to Evacuated tube collector (ETC) based system because ETCs are made of glass which are of fragile in nature.
Both these systems are available with and without heat exchanger. They can also work with and without pump. Systems without pump are known as thermosyphon systems and those with pump are known as forced circulation systems.

Which type of SWH is suitable for different places/Category of users?

ETC based systems are cheaper than FPC based system. They perform better in colder regions and avoid freezing problem during sub-zero temperature. FPC based systems also perform well with anti-freeze solution at subzero temperature but their cost increases. In other regions, both perform equally well.
Systems working on thermosyphon principle are simple and relatively inexpensive. They are suitable for domestic and small institutional applications, provided water quality is good and it doesn’t have large chlorine contents. Forced circulation systems are generally preferred in industries or large establishments.
At places where water is hard and have larger chlorine content, if FPC based system is being installed, it must be with heat exchanger as it will avoid scale deposition in copper tubes of solar collectors which can block the flow of water as well reduce its thermal performance. ETC based systems will not block the flow of water but its performance may go down due to deposition of salt contents on inner surface of glass tubes, which could be cleaned easily once in a year or so.

What is the approximate cost of solar water heater?

Cost of solar water heater depends on size and type of system installed.
Smallest size of a system is 100 liter per day, which means that it can deliver 100 litres of hot water in a day at 60 C. A 100 lpd capacity system is sufficient for a family of 3-4 members and it may cost Rs. 15,000 to Rs.22,000 in plains depending on the type of system. In hilly & N-E region, the cost may be 15 to 20% more.
The system cost does not include the cost of cold water tank, & its stand which is required if overhead tank is not installed in a house/ building. Cost of hot water insulated pipe line also, may be extra if number of bathrooms is more than one. Additional cost towards all these components may increase by 5 to 10%.
The cost, however, does not increase linearly with increase in capacity; rather it comes down proportionately as we go for higher capacity system.

Is there any subsidy available from Government?

No. The subsidy scheme has been discontinued w.e.f 12.08.2014 onwards.

Why should I go for a Solar Water Heater? What do I save from it?

A 100 litre per day capacity system suitable for 3-4 people can save up to
1500 units of electricity in a year depending on the amount of hot water used. It can also save around 140 litres of diesel in an establishment using oil fired boiler besides reducing greenhouse gas emissions in the atmosphere. Higher capacity systems will save higher amount of electricity/fuel oil besides reducing higher amount of GHG emissions.
Electricity is expensive and is not available due to power cuts in many areas when required for heating water. Solar Water Heater, since it stores hot water in an insulated tank, provides water all the time when required. Fuel oil is also expensive and creates pollution. Storing the fuel oil for long term use in commercial establishments is another problem.
The table below gives approximate likely electricity and money savings for a typical 100 liters per day system located in different parts of the country.

What happens on cloudy/rainy day? Do I still get hot water?

On cloudy days also, if it is for a day or two, you still get warm water as water gets heated due to diffused radiation available in the atmosphere. The system, however, is either connected to an electric geyser in the house or an electrical back-up is provided in the storage tank of the system which is switched on when water is not sufficiently hot. So, you get hot water all the time even on rainy days.

How do I decide about the size/capacity of the system to be installed?

Ministry has laid down some minimum technical requirements for installation of solar water heating systems in the field. These have been made mandatory for manufacturers and suppliers and are available on MNRE website: www.mnre.gov.in. These requirements are have been prepared in such a way that even a lay man can also check them and ensure that those are being adhered to by the manufacturers/suppliers. In case any manufacturer/supplier is found not sticking to these requirements, he may be blacklisted if informed to the Ministry.

 

Application Typical Requirement of Hot
Water at 60° C
Household bathing using buckets 10-20 liters per person per bath.
Household bathing using shower
with a mixing tap
20-30 liters for 10-15 minute
bath
Shaving, while a tap runs 7-10 liters
Household bathing in bathtub (one
filling)
50-75 liters
Wash basin with a mixing tap (hand wash, brushing of teeth, etc.) 3-5 liters per person per day.
Kitchen washing 2-3 liters per person per day.
Dishwasher 40-50 liters per wash cycle
Clothes washing machine 40-50 liters per cycle

 

Application Typical Requirement of Hot
Water at 60° C
Household bathing using buckets 10-20 liters per person per bath.
Household bathing using shower
with a mixing tap
20-30 liters for 10-15 minute
bath
Shaving, while a tap runs 7-10 liters
Household bathing in bathtub (one
filling)
50-75 liters
Wash basin with a mixing tap (hand wash, brushing of teeth, etc.) 3-5 liters per person per day.
Kitchen washing 2-3 liters per person per day.
Dishwasher 40-50 liters per wash cycle
Clothes washing machine 40-50 liters per cycle

Are there any maintenance requirements?

Domestic solar water heating system do not need significant maintenance requirements. Occasional leakages in the plumbing could be easily repaired by common plumbers. In case quality of water is hard, scale deposition in the collectors may result over the years. This may require de-scaling with acids for which it is best to contact the suppliers. Broken glass may also have to be replaced by the suppliers. If outside exposed surfaces are painted, the paint may have to be redone every 2-3 years to prevent corrosion of the surfaces.

Problem faced and Probable cause, remedies

No water in tap

– No cold water supply
– Wall at the outlet of system closed
– Air lock in the pipes

Water not heated at all, although cold water flow is normal

– Consumption of hot water may be too high; Check
use points and use pattern
– Collector may be shaded
– No flow of water through the Collector as it might be choked due to scaling; Get it checked from the manufacturer

Water not hot enough or sufficient quantity of hot wter is not available

– Cloudy weather
– Consumption too high
– Frequent on-off of hot water tap
– Collector dirty
– Vapour lock in the collector which can be removed by allowing it to cool & draining the system
– Partial choking of the collector

Little quantity of boiling hot water is received

– Vapour locking in the collector
– Pinched inlet/outlet pipes

Contact Us

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07038024444

suntechslr@gmail.com

Head Office

Opp. Kanya Shala,
Bapat Lane, Chiplun, Dist.
Ratnagiri-415 605. MS.

Branch office

205,Vashine CHS,
Plot No.:23, Sector:11,
New Panvel(East).
Navi Mumbai-410206,MS.

Contact Us

Connect Us On Facebook

07038024444

suntechslr@gmail.com

Head Office

Opp. Kanya Shala,
Bapat Lane, Chiplun, Dist.
Ratnagiri-415 605. MS.

Branch office

205,Vashine CHS,
Plot No.:23, Sector:11,
New Panvel(East).
Navi Mumbai-410206,MS.