Solar Battery

Your Professional Solar Battery Manufacturer in China!

Shimastu Electronic Technology Co., Limited, a premier manufacturer of Sealed Lead Acid batteries&Lithium batteries, was established in 2001 and located in Zhongshan City, Guangdong Province, China.

Why Choose Us

Wide Product Range

Our main products cover AGM VRLA batteries, GEL batteries, OPzV/OPzS batteries, font terminal batteries, 2V long-life batteries, lead carbon batteries, lithium batteries, Car batteries, etc.

Quality Guaranteed

Shimastu strictly works on quality control of all production steps, ensuring all the products a reliable performance and high quality, and the company has been certified with ISO 9001, ISO 14001, UL and CE, etc.

Wide Applications

Shimastu has been exporting to worldwide clients serving in the energy storage and power backup industry such as UPS/EPS, solar power systems, security systems, emergency lighting systems, telecom systems, data centers, etc.

High Quality Service

We specialize in research and development, manufacturing, sales, and marketing of full categories of batteries. We are committed to providing a high level of customer service, and 24/7 customer support, so all your problems can be responded to quickly.

Deep Cycle Batteries

Our main products cover AGM VRLA batteries, GEL batteries, OPzV/OPzS batteries, font terminal

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GEL Batteries

We specialize in research and development, manufacturing, sales, and marketing of full categories

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Flooded Tubular VRLA Batteries

Shimastu OPzS Series Flooded Tubular VRLA Battery is a flooded lead acid battery,with low

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Valve Regulated Tubular Plate GEL Batteries

Shimastu OPZV series Valve Regulated Tubular Plate GEL(Tubular GEL) Batteries use fumed gelled

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Deep Cycle Batteries

Shimastu NPC series Deep Cycle Batteries are deep-cycle battery designed to be regularly deeply

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GEL Batteries

Shimastu Gel series Gel Batteries are manufactured with special separators and silica gel

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Definition of Solar Battery

A solar battery can be an important addition to your solar power system. It helps you store excess electricity that you can use when your solar panels aren't generating enough energy, and gives you more options for how to power your home. A solar battery is a device that you can add to your solar power system to store the excess electricity generated by your solar panels. You can then use that stored energy to power your home at times when your solar panels don't generate enough electricity, including nights, cloudy days, and during power outages.

Working Principle of Solar Battery

Feeding the Solar Energy

When sunlight rays hit the panels, the visible light is converted to electrical energy. The electrical current flows into the battery and is stored as DC electricity. It’s worth noting that there are two types of solar batteries: AC-coupled and DC-coupled. The latter has a built-in inverter that can convert the electricity current to DC or AC. As such, the DC solar electricity will flow from the panels to an external power inverter, which will convert it to AC energy that can either be used by your home appliances or stored in the AC battery. What the built-in inverter will do in this case is convert the AC electricity back to DC for storage. As for a DC-coupled system, the battery doesn’t have a built-in inverter. As such, the DC electricity from the solar panels flows to the battery via a charge controller. Unlike in an AC setup, the power inverter in this system is only connected to your home’s wiring. As such, electricity from the solar panels or your storage battery is converted from DC to AC before flowing to your home appliances. What determines how much energy is stored in the battery? Read on to find out more.

The Charging Process

As power flows from the solar panels, your home’s electricity setup will take precedence. Therefore, electricity directly feeds your appliances, like refrigerators, TVs, and lights. Often, this energy from solar panels can be more than what you need. For instance, on a hot afternoon, a lot of power is produced, yet your home isn’t using much of it. In such a scenario, net metering occurs, wherein the extra energy flows back to the grid. However, you can use this overflow to charge up your batteries. The amount of electricity stored in the battery depends on how fast it charges up. If, for example, your home doesn’t use up too much power, then the charging process will be quick. Also, if you’re connected to huge panels, then a lot of electric energy will flow to your home, which means the batteries will charge up a lot faster. Once your battery is full, the charge controller will prevent it from overcharging.

Benefits of Solar Battery You Want to Know

Valve Regulated Tubular Plate GEL Batteries

Save Excess Energy

Your solar power system might be producing a good amount of energy but don’t let that excess energy go to waste. While some people might be able to sell it back or transfer it back in the grid, a wiser idea is to get a solar battery and have it store the energy you produce. With these solar batteries, you can easily ensure that your home is powered throughout the day and night.

Reduce Carbon Footprint

Some people believe that generators and other energy systems are just as, if not more, effective as solar power systems and batteries. However, solar power systems are responsible for not only producing electrical energy, they are producing clean energy. This means that the process of producing energy does not pollute the environment. There are no harmful emissions or by-products that could cause further harm to the environment or the ecosystem. Even storage batteries are environmentally friendly and free of emissions. For this reason, going green with solar power systems and solar batteries is highly favoured in carbon footprint reduction.

Help Save Money

Solar power systems and solar batteries allow you to save money. Keep in mind that these savings are relevant in the long-term. If you’re looking for a short-term solution, you might not be too enthused with a solar power system since it can be costly to purchase and install. On the other hand, if you’re willing to consider it as an investment, you can expect to see big savings.

Great for Emergencies

Often times, emergencies, either man-made or natural, can cause a blackout. This deprives you of energy for a few hours and in some situations, even days or weeks. In such instances, your solar batteries are really going to play a role in providing you with the energy to make it through trying times. A single solar power battery lets you survive on a day-to-day basis.

Classification of Solar Battery

Lead Acid Batteries
Lead acid batteries are the tried and true technology of the solar battery world. These deep-cycle batteries have been used to store energy for a long time, in fact. And they’ve been able to stick around because of their reliability. There are two main types of lead acid batteries: flooded lead acid batteries and sealed lead acid batteries.

Lithium Ion Batteries
Lithium ion batteries are the new kids on the energy storage block. As the popularity of electric vehicles began to rise, EV manufacturers realized lithium ion’s potential as an energy storage solution. They quickly became one of the most widely used solar battery banks.

Nickel Cadmium Batteries
Nickel cadmium (Ni-Cd) batteries aren’t as widely used as lead acid or lithium ion batteries. The main benefit of Ni-Cd batteries is that they are durable. They also have the ability to operate at extreme temperatures. Additionally, they don’t require complex battery management systems and are basically maintenance-free.

Flow Batteries
Flow batteries are an emerging technology in the energy storage sector. They contain a water-based electrolyte liquid that flows between two separate chambers, or tanks, within the battery. When charged, chemical reactions occur which allow the energy to be stored and subsequently discharged. These batteries are now beginning to rise in popularity.

Applications of Solar Battery

Residential Applications

Backup Power: In case of power outages, solar batteries can supply electricity to your home, ensuring that essential appliances keep running.

Energy Independence: Store excess solar energy for use during nighttime or cloudy days, reducing your reliance on the grid.

Off-Grid Living: For homes in remote locations without access to electricity, solar batteries can store generated power for a consistent energy supply.

Demand Shaving: By using stored solar energy during peak hours, you can reduce your electricity bills.

Commercial Applications

Emergency Backup: For businesses, solar batteries can provide emergency power to critical systems like data centers.

Energy Arbitrage: Businesses can store low-cost energy and use or sell it when prices are high.

Grid Services: Large battery systems can provide services to the electrical grid, such as frequency regulation and demand response.

Specialized Uses

Remote Installations: For field research stations, military bases, or other specialized installations, solar batteries can provide a reliable power source.

Portable Solar Generator: A portable solar generator can be used for camping, boating, and other recreational activities.

Electric Vehicle Charging: Some people use solar batteries to store energy for charging electric vehicles.

Community and Utility Scale

Microgrids: In smaller community grids, solar batteries can provide backup power and grid stabilization.

Grid Stabilization: On a larger scale, utility companies use massive battery installations to store energy and stabilize the electrical grid.

How to Choose Solar Battery

Battery Capacity

Batteries are rated in amp-hours, or simply amps. The indicated power rating is typically the fully developed capacity of the battery. This means that it may take tens to hundreds of charging cycles before the battery can reach the indicated full capacity. In other words, it can be misleading to test your battery after only a few cycles of charges.

You do not need to understand the physics behind electricity to estimate your power needs or properly size your batteries. If you already use power from the grid, this guide can help you estimate your power consumption based on your electricity bills. As a rule of thumb, always estimate your peak power requirements using amp-hours. A battery rated 100 amp-hours, for instance, can theoretically put out 1 ampere of electric energy for 100 hours or 10 amps for 10 hours. When selecting a solar battery, understanding your power needs is the key to choosing the battery with sufficient energy storage.

Lifespan and Charge/Discharge Cycles

The lifespan of a battery is a crucial factor when designing robust solar batteries. The design process often focuses on making the battery resist heat and cold cycles to deliver peak performance for longer. The type of battery technology also plays a significant role in determining the lifespan of the battery. Three factors that affect the longevity of a battery that you should check when shopping for one are.

Depth of Discharge: This is the extent to which the battery is discharged or used, relative to its capacity. Since batteries degrade as they are used, their capacity deteriorates over time.

Cyclic Life: This is the number of charge and discharge cycles of the battery. During regular use, flooded batteries typically last for between 300 and 700 cycles. Gel batteries can store and deliver peak power for as many as 500 to 5000 cycles. Lithium batteries can last for up to 200 cycles.

Temperature: The chemical activity inside batteries increases with temperature. To extend the lifespan of your solar batteries, install them in a temperature-controlled room.

Flooded Vs. Sealed Batteries

Solar batteries can be broadly categorized into two: flooded and sealed. Flooded batteries are the standard lead-acid batteries used in vehicles and off-grid solar installations. They are affordable, and because they can be easily cleaned and serviced, have longer lifespans. When in use, these batteries generate small amounts of hydrogen gas. Sealed batteries are also known as VRLA (valve regulated lead acid) batteries. They cannot be serviced or maintained because they are sealed. A charge controller maintains the fluids and plates inside the battery to prolong their lifespan. These batteries do not emit hydrogen gas when in use.

Peak Power Output

Solar power batteries can be classified by their kilowatt peak or kWp. kWp is the theoretical peak power output of the system in ideal conditions. The peak output is more of a measure of comparison than an absolute unit. When choosing a solar battery, the kWp rating indicates the highest amount of power it can output at its best performance: the higher the peak power output rating, the better the battery.

Round-Trip Efficiency

The round-trip efficiency of a battery is the amount of energy that can be computed as a percentage of the energy used to store it. For instance, if 100 kWh of electricity is fed into a battery, and it can only output 90 kWh, the round-trip efficiency of the battery would be 90% (90 kWh / 100 kWh x 100). Always go for batteries with a higher round-trip efficiency because they are more economical.

Ambient Working Temperature

Ambient temperature is the average air temperature surrounding the battery, or the temperature of the room in which the battery is installed. The rating indicates the optimum temperature under which the battery will perform normally. The ambient working temperature of a solar battery is a crucial rating that is often overlooked. This is particularly important for people living in regions with extreme temperatures.

Certifications

Our batteries have been certified with ISO 9001, ISO 14001, UL and CE, etc.

Our Factory

Frequently Asked Questions (FAQ) about Solar Battery

Q: What is difference between solar battery and normal battery?

A: Solar batteries have a higher capacity than normal batteries, this means they can store more energy which can be used for a longer period of time. This is important for a solar energy system, as the energy generated during the day can be stored and used at night, and during periods of low sunlight.

Q: How solar batteries work with a solar power system?

A: This entire process starts with the solar panels on the roof generating power. Here is a step-by-step breakdown of what happens with a DC-coupled system.

Sunlight hits the solar panels and the energy is converted to DC electricity.

The electricity enters the battery and is stored as DC electricity.

The DC electricity then leaves the battery and enters an inverter to be converted into AC electricity the home can use.

The process is slightly different with an AC-coupled system.

Sunlight hits the solar panels and the energy is converted to DC electricity.

The electricity enters the inverter to be converted into AC electricity the home can use.

Excess electricity then flows through another inverter to change back into DC electricity that can be stored for later.

If the house needs to use the energy stored in the battery, that electricity must flow through the inverter again to become AC electricity.

Q: How solar batteries work with a hybrid inverter?

A: If you have a hybrid inverter, a single device can convert DC electricity into AC electricity and can also convert AC electricity into DC electricity. As a result, you don't need two inverters in your photovoltaic (PV) system: one to convert electricity from your solar panels (solar inverter) and another to convert electricity from the solar battery (battery inverter). Also known as a battery-based inverter or hybrid grid-tied inverter, the hybrid inverter combines a battery inverter and solar inverter into a single piece of equipment. It eliminates the need to have two separate inverters in the same setup by functioning as an inverter for both the electricity from your solar battery and the electricity from your solar panels. Hybrid inverters are growing in popularity because they work with and without battery storage. You can install a hybrid inverter into your battery-less solar power system during the initial installation, giving you the option of adding solar energy storage down the line.

Q: How much energy can be stored in a solar battery?

A: The energy that a solar battery can store is measured in kilowatt-hours (kWh), and different manufacturers produce batteries that can hold varying amounts of power. In addition, most solar batteries can be linked together or installed in an interconnected design to offer a larger combined storage capacity if your needs are higher than what a single battery can provide.

Q: How do solar batteries fit into the larger electric grid?

A: At peak hours of the morning and evening, demand on the electric grid increases drastically, as more people are at home using more electricity. (This change in demand is called the “duck curve”.) The increased demand causes utilities to scale up their electricity generation at power plants, and the sudden rise in demand at certain hours of the day may cause disruptions, and there are risks of oversupply. Basically, utilities have to be prepared for peak demand, and a lot of their electricity generation potential goes unused when demand is lower. Building this excess electricity generation capacity is expensive, and leads to higher utility rates as a result. Adding solar batteries to home solar PV systems can help flatten the demand curve, so the grid can be designed for more typical usage and doesn't need to be built for surges and spikes. During the day when demand is lower, solar panels can charge solar batteries, and then when demand increases, solar batteries can help supply the extra power that’s needed, so it doesn’t have to be generated by the utilities. Therefore, solar battery storage plays a crucial role in streamlining grid power production and distribution, and can better align utility capacity with normalized demand.

Q: What are the differences between DC-coupled vs AC-coupled solar batteries?

A: The type of electricity used in homes and buildings is alternating current, or AC power, but batteries must be charged with direct current, or DC power. Solar panels also produce DC power. In order for the energy stored in batteries to be used in your home, the DC power must first be converted into AC power by an inverter. Each time the power is converted from DC to AC (or vice versa), a little bit of energy is lost. The difference between DC-coupled batteries and AC-coupled batteries has to do with where the inverter is in the setup. A DC-coupled battery connects directly to a hybrid string inverter, allowing the DC solar output to flow directly to the batteries, while an AC-coupled battery has its own inverter.

Q: How long can a solar battery power a house?

A: 24 hours. This is often measured in kilowatt-hours or kWh. The average battery is about 10 kWh. In a power outage a fully charged 10 kWh battery should allow you to power your home for 24 hours. However, it is important to not entirely drain all the energy of the battery.

Q: Can solar batteries be used off-grid?

A: Yes, solar batteries are essential for off-grid systems, providing a reliable power source when solar panels cannot generate electricity. They are also highly efficient with a charge-discharge efficiency of up to 80%. This means that they can store more energy than other types of batteries making them ideal for off-grid solar systems.

Q: How long do solar batteries last?

A: Most solar batteries on the market today will last somewhere between five to 15 years. While that is a significant amount of time, you'll likely need to replace them within your solar system's 25 to 30+ year lifespan.

Q: How do I size a solar battery system for my home?

A: Sizing depends on your energy consumption, daily sunlight exposure, and desired backup capacity. To find out the size of battery, calculate as follows: Calculate total Watt-hours per day used by appliances. Divide the total Watt-hours per day used by 0.85 for battery loss. Divide the answer by 0.6 for depth of discharge.

Q: Can solar batteries be connected in parallel or series?

A: Yes. There are two ways, in Series or in Parallel. When batteries are wired in Series, the voltage is added. When batteries are wired in Parallel, the amp/hours are added. If we wire four 100 amp/hour batteries together in Parallel, our system will have 400 total amp/hours of energy at 12 volts.

Q: What maintenance is required for solar batteries?

A: Regular monitoring, ensuring proper ventilation, and periodic checks of connections are essential for maintaining optimal performance. Cleaning your solar batteries, rinse off your battery terminals using water, then apply a sealant or a high-temperature grease (such as WD-40). For solar panels, clean their batteries at least twice a year so they can supply their renewable energy efficiently.

Q: How do extreme temperatures affect solar battery performance?

A: Temperatures above 25ºC (77ºF) will slightly increase capacity but also will increase self-discharge and shorten battery life. Although the capacity of a battery will increase as temperatures rise, any cycle life loss due to operating at higher temperatures is not recoverable.

Q: What is the role of an inverter in a solar battery system?

A: An inverter is one of the most important pieces of equipment in a solar energy system. It's a device that converts direct current (DC) electricity, which is what a solar panel generates, to alternating current (AC) electricity, which the electrical grid uses.

Q: What is the depth of discharge in solar batteries?

A: A battery's depth of discharge (DoD) indicates the percentage of the battery that has been discharged relative to the overall capacity of the battery. Depth of Discharge is defined as the capacity that is discharged from a fully charged battery, divided by battery nominal capacity.

Q: What are the safety precautions for solar batteries?

A: Proper safety precautions must be taken whenever you are near your battery bank. Use thick gloves and protective eyewear and remove all metal items. The last thing you want is to be burned by acid or electrocuted. Just in case there is an acid leak, make sure you have baking soda and water near the batteries.

Q: Why solar batteries are not charging in the cold?

A: Also, the batteries lose efficiency in the cold and won't last as long. Lithium batteries will have the electrolyte turn solid below 35 degrees and they lose a huge amount of efficiency, so they won't last as long. Only thing you can do is bring the solar batteries indoors and warm them before charging.

Q: How do I choose between lead-acid and lithium-ion solar batteries?

A: Consider factors such as cost, lifespan, and maintenance requirements. While lead-acid batteries are cheaper, lithium-ion batteries generally offer higher energy density and longer lifespans.

Q: Are there limitations to the number of charge-discharge cycles for solar batteries?

A: Estimated life cycles help the buyers to assess the number of cycles a battery can withstand after a charge or discharge. For example, a battery may have 5000 cycles at 30% DoD and 1000 cycles at 75% DoD. If the battery exceeds its DoD limit, it is highly likely to degrade its cycle life quickly.

Q: What can you run off a solar battery?

A: A battery's output is what determines how many appliances you can run. Most solar batteries come with power output ratings of about 5 kW, which means they can provide enough power to run a refrigerator, clothes dryer, and an electric stovetop at once. A battery's size determines how long your appliances can run.

We're professional solar battery manufacturers and suppliers in China, specialized in providing high quality custom service. We warmly welcome you to wholesale high-grade solar battery made in China here from our factory. For price consultation, contact us.

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