Solar battery | 2020 |
Interest in energy storage for solar power system is growing rapidly. It’s not all about living off the grid anymore. Storage helps solve variability issues
Interest in energy storage for solar power system is growing rapidly. It’s not all about living off the grid anymore. Storage helps solve variability issues with renewables. Adding a solar battery to a grid-connected residential project also allows the array to keep providing power to critical loads when the grid is down, instead of having to disconnect and refrain from generating power. Storage can also help commercial consumers reduce peak demand charges, significantly lowering their energy bills. Storage is even used at the utility level to help provide ancillary services to the grid. The need for storage grows as govt. also promotes the use of batteries. .
Batteries in solar applications have to meet the demands of unstable grid energy, heavy cycling (charging and discharging) and irregular full recharging. There’s a variety of battery types fitted for these unique requirements. There are certain specifications you should use when evaluating your solar battery options, such as how long the solar battery will last or how much power it can provide, cycle life and installation and maintenance etc..
Solar batteries are C10 rating deep cycle battery designed for connecting with solar charge controllers, inverters for giving power backup at night. It is designed to be charged from Solar panels in the day from sunlight. The main component of battery is the lead inside it. Higher lead ensures better battery performance and quality. Lead acid batteries are not sealed and Maintenance free hence it requires water top up once in 3-6 month.
Here’s a look at these aspects of each technology, as well as some best practices when selecting batteries for a solar installation.
How to compare your solar storage options
As you consider your solar-plus-storage options or you can say solar power plant with battery storage ( off-grid solar plant ) , you’ll come across a lot of complicated product specifications. The most important ones to use during your evaluation are the battery’s capacity & power ratings, depth of discharge (DoD), warranty, and manufacturer.
Capacity & power
Capacity is the total amount of electricity that a solar battery can store, measured in Watt-hours (the symbol Wh). A Watt-hour is the voltage (V) that the battery provides multiplied by how much current (Amps) the battery can provide for some amount of time (generally in hours). Voltage * Amps * hours = Wh. Most home solar batteries are designed to be “stackable,” which means that you can include multiple batteries with your solar-plus-storage system to get extra capacity.
While capacity tells you how big your battery is, it doesn’t tell you how much electricity a battery can provide at a given moment. To get the full picture, you also need to consider the battery’s power rating. In the context of solar batteries, a power rating is the amount of electricity that a battery can deliver at one time. It is measured in kilowatts (kW).
A battery with a high capacity and a low power rating would deliver a low amount of electricity (enough to run a few crucial appliances) for a long time. A battery with low capacity and a high power rating could run your entire home, but only for a few hours.
Depth of discharge (DoD)
Most solar batteries need to retain some charge at all times due to their chemical composition. If you use 100 percent of a battery’s charge, its useful life will be significantly shortened.
The depth of discharge (DoD) of a battery refers to the amount of a battery’s capacity that has been used. Most manufacturers will specify a maximum DoD for optimal performance. For example, if a 10 kWh battery has a DoD of 90 percent, you shouldn’t use more than 9 kWh of the battery before recharging it. Generally speaking, a higher DoD means you will be able to utilize more of your battery’s capacity. The Lithium ion batteries usually have a higher DoD up to 90% as compared to the lead acid batteries which usually have DoD of 50%.
Battery life & warranty
For most uses of home energy storage, your battery will “cycle” (charge and drain) daily. The battery’s ability to hold a charge will gradually decrease the more you use it. In this way, solar batteries are like the battery in your cell phone – you charge your phone each night to use it during the day, and as your phone gets older you’ll start to notice that the battery isn’t holding as much of a charge as it did when it was new. For example, a battery might be warrantied for 2,000 cycles or 3 years at 70 percent of its original capacity. This means that at the end of the warranty, the battery will have lost no more than 30 percent of its original ability to store energy.
Your solar battery will have a warranty that guarantees a certain number of cycles and/or years of useful life. Because battery performance naturally degrades over time, most manufacturers will also guarantee that the battery keeps a certain amount of its capacity over the course of the warranty. Therefore, the simple answer to the question "how long will my solar battery last?" is that it depends on the brand of battery you buy and and how much capacity it will lose over time.
In India Battery warranty has two aspects a) Replacement warranty and b) Pro rata warranty. If your battery fails in replacement warranty, Brand will replace it with new battery and during pro rata warranty period, a new battery is offered at discounted price, which is, also known as buy back offer
Many different types of organizations are developing and manufacturing solar battery products, from automotive companies to tech startups. While a major automotive company entering the energy storage market likely has a longer history of product manufacturing, they may not offer the most revolutionary technology. By contrast, a tech startup might have a brand-new high-performing technology, but less of a track record to prove the battery’s long-term functionality.
Whether you choose a battery manufactured by a cutting-edge startup or a manufacturer with a long history depends on your priorities. Evaluating the warranties associated with each product can give you additional guidance as you make your decision.
Solar Battery Price
Solar battery price depends upon Battery AH and Warranty, The price ranges from ₹3950 to ₹17900. The Tubular Technology batteries with 5 years of replacement warranty will be the costliest as tubular battery indicates latest technology with higher energy efficiency in batteries. The other important factor which impacts the price of batteries in India are
• Brand Name
• Replacement warranty offered on batteries
• Capacity of Battery measured in Ampere hour (AH)
Solar Battery Price in India | 2020
The solar battery market in India is fragmented, 60% batteries are manufactured by local manufacturers, rest 40% market is captured by brands such as Exide, Luminous, Okaya, Sukam and Amaron. here is the average price list of solar batteries taken from different cities across India.
Solar Battery Model Average Selling Price
20 Ah Tubular solar battery, 5 years warranty ₹ 3,900
40 Ah Tubular solar battery, 5 years warranty ₹ 5,300
60 Ah Tubular solar battery, 5 years warranty ₹ 7,250
80 Ah Tubular solar battery, 5 years warranty ₹ 8,700
100 Ah Tubular solar battery, 5 years warranty ₹ 10,900
120 Ah Tubular solar battery, 5 years warranty ₹ 12,600
150 Ah Tubular solar battery, 3 years warranty ₹ 14,400
150 Ah Tubular solar battery, 5 years warranty ₹ 17,300
200 Ah Tubular solar battery, 3 years warranty ₹ 18,700