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Batteries2024-03-23T16:29:07+05:30

All About Batteries

Here you will get all the basics on solar batteries 

Solar Batteries in India

Here you will get all info about the manufacturers in India, pros and cons, and the best options in the market for you to buy 

FAQs

The most common questions answered just for you 
What factors affect the electricity generated from the rooftop solar panel system? Will it be the same all year round?2024-04-01T17:48:01+05:30

The generation of electricity from the rooftop solar panel system depends on many parameters such as –

  • Location of the rooftop solar (part of the country) 
  • Quality of equipment used  
  • No. of sunshine hours  
  • Temperature and irradiance (the strength of sunlight received) 
  • PV module tilt angle and orientation  
  • Module cleaning, and other maintenance activities  

The daily energy generation will be dependent on the weather conditions such as temperature, solar irradiance, etc., and these may not be same every day. 

What is the daily energy generated from a 1 kW solar panel system?2023-12-16T19:52:30+05:30

On a clear sunny day, 1 kWp solar power plant can generate 4 to 5.5 units of electricity in a day

(To compare, check the number of units consumed by you as seen on your electricity bill) 

What types of roofs are suitable for rooftop solar system?2023-12-16T19:50:06+05:30

Rooftop solar PV systems can be installed on any type of roof having sufficient load bearing capacity. 

Why do I need shadow-free area for my solar PV system?2023-12-16T19:48:15+05:30

Solar modules (and cells within) need uninterrupted sunlight to produce maximum electrical energy. With the shadow even on a part of the module, the generation reduces to a great extent thereby wasting installed system capacity. Also, prolonged (regular, though intermittent) shadow on some cells or modules reduces their life substantially and these become useless much before their standard life of over 25 years 

How much area is required for a 1 kW rooftop Solar PV system?2023-12-16T19:55:14+05:30

As a rule of thumb, for each 1 kW of rooftop system generally requires 80-100 sq. ft (i.e. 8-10 sq. mtr) of shadow-free area.  

However, actual area requirement may vary depending on the efficiency of solar module, their placement, inverter type, etc.

What are the different types of solar panel systems?2023-12-16T20:01:28+05:30

There are 3 types of solar panel systems –

  1. Grid connected or on-grid systems – These are solar systems that are connected to the building mains directly. These systems give priority to the solar power generated and only if the generated power is less than that required, will the grid power be used. In a grid connected system,  you are eligible for net-metering, a process where any excess power that you produce is fed back to the grid and you receive a credit for the same. In case you generate more than you consume in one complete year, the electricity distribution company (DISCOM) also pays you for the excess units generated. In many states, Net Metering has been made mandatory to avail subsidy for solar.
  2. Off-grid solar systems are those which are set up independently from the electricity grid. These systems have a battery backup system which is charged by the generated solar energy. During the day when the generated power is more than the power being consumed, batteries are charged. During evening & night the electricity from the battery is used to run all home appliances. These systems are generally more costly than on-grid systems and have lower efficiency. The battery needs to be replaced every five years or so. Off-grid systems are perfect for your rooftop solar plants if you have a very erratic power supply or do not get any power at all.
  3. A hybrid system brings the best of both worlds and is a combination of an on-grid and off-grid solar system. Hybrid systems have a battery backup which helps store the generated energy. What differentiates hybrid systems from off-grid systems is that, once the battery is fully charged, any excess power generated which is not being utilised will be fed back to the grid and the you will get suitably compensated.
Why should one install solar panels at home in India?2023-12-19T11:26:32+05:30

There are several reasons why installing solar panels at home in India can be beneficial: 

  1. Cost Savings: Solar panels generate electricity from sunlight, which is a free and renewable source of energy. By installing solar panels at home, you can significantly reduce your electricity bills, saving you money in the long run. 
  2. Environmental Benefits: Solar panels produce clean energy that does not emit any harmful pollutants or greenhouse gases, which helps reduce your carbon footprint and contributes to a healthier environment. 
  3. Energy Independence: By generating your own electricity, you reduce dependence on fossil fuels, and become less reliant on the grid. This is especially beneficial in areas with frequent power cuts or unreliable electricity supply. 
  4. Government Incentives: The Government of India offers incentives and subsidies for installing solar panels, including tax rebates, net metering, and low-interest loans, which makes the installation more affordable. 
  5. Increased Property Value: Installing solar panels can also increase the value of your property, making it more attractive to potential buyers if you decide to sell in the future. Wouldn’t you be willing to pay more for a home that had a lower cost to maintain? 
  6. Low Maintenance: Solar systems typically require very little maintenance; they are incredibly durable and easily accessible for service and repair.

Overall, installing solar panels at home in India can be a smart investment that not only helps you save money on electricity bills but also contributes to a cleaner, more sustainable future. 

How does solar work?2023-12-19T12:04:57+05:30

The functioning of a solar panel system is fairly simple –

  • During the day, solar cells in your solar panels absorb the energy from sunlight
  • Circuits within the cells collect that energy and turn it into direct current (DC) energy  
  • However, most appliances in our home work on Alternating Current (AC) electricity. Therefore, the DC electricity generated from panels is passed through a device called an inverter to convert it to the usable AC electricity
  • This AC electricity output is either connected to the mains of your home, or stored in a solar battery so that it can be used in all appliances at your home

 

Will a solar energy system protect me from grid blackouts and outages?2023-12-16T19:45:29+05:30

Even though you have a solar energy system, your power will also be interrupted for the safety of the repair crews who may be working on the power outage. Homeowners, looking to protect themselves against outages and blackouts should consider a battery backup system to gain independence from the grid. 

Why Don’t More People Use Battery packs?2023-12-19T12:18:22+05:30

Cost and availability. Solar PV systems that include battery storage are still quite expensive, and there are waiting lists for specific brands. If you’d like the comfort of knowing that you’ll have power and independence when the grid goes down, a solar PV system that includes solar battery backup to protect against outages may make sense. 

Difference Between MPPT & PWM Solar Charge Controller 

Let’s understand these 4 reasons why MPPT solar charge controller is better than the PWM Solar charge controller. 

Efficiency

A PWM solar charge controller is usually manufactured with an efficiency of 67%. That simply means if you connect a 100W solar panel with a PWM solar charge controller you will get an output of 67W approximately. MPPT charge controllers are designed at 94% efficiency. That means a 100W panel would generate 94W, which is approximately 27W extra as compared to PWM charge controllers. 

Cost Saving & Improves Battery Health 

To charge a 150Ah battery you need approximately 15amp of current. Now let us compare the number of panels you require to charge your batteries with a PWM charger and an MPPT charger. To generate 15amps you will need 300W (3 panels of 100W each) solar panels with a PWM charge controller and the same current will be generated from a 200W (2 panels of 100W each) solar panel. 

This means you can charge a battery equally well with fewer solar panels using an MPPT charger. Sounds great, doesn’t it? MPPT means maximum power point tracking which means it will make sure that it extracts maximum power from solar panels at all times of the day and charges the battery according to its current state of charge efficiently. No overcharging and no undercharging. 

Maximum Power Output 

Like I said the beauty of an MPPT charger is that it has a brain. Yes, you heard that right. An MPPT solar charge controller will make sure that no matter what the weather condition it will extract maximum power from a solar panel. A PWM solar charge controller will on the other hand just charge the batteries with as much power as the solar panels are generating. 

Supports DC Load 

Yes, you heard that right. It has the capability to run load directly from its output. So if you do not require a power back up just buy solar panels, connect it to an MPPT charger and light up your DC Load. That’s how easy it gets. Whereas a PWM charger only charges the batteries it does not have the provision to connect to DC load. 

No doubt MPPT solar charge controller is better than PWM solar charge controller. Hope you enjoyed reading the article. Don’t forget to share it with your friends. 

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