Renogy 12v 100ah Smart Lithium Iron Phosphate Battery

What is a litime 12V 100Ah LiFePO4 battery?

The LiTime 12V 100Ah LiFePO4 battery stands out for its impressive performance and value in various off-grid and energy storage applications. As a Grade A+ Lithium Iron Phosphate (LiFePO4) battery, it offers superior energy density, stable performance, and enhanced safety.

Are 100Ah LiFePO4 batteries a good choice?

Manufacturers like FIUNIE and Autocessking offer a warranty that covers defects and performance issues, ensuring customer peace of mind. In conclusion, the 100Ah LiFePO4 lithium batteries discussed here represent some of the best options for those looking for dependable, long-lasting energy storage.

What is a lithium iron phosphate (LiFePO4) battery?

As a Grade A+ Lithium Iron Phosphate (LiFePO4) battery, it offers superior energy density, stable performance, and enhanced safety. Compared to traditional lead-acid batteries, it boasts an outstanding lifespan with up to 15,000 deep cycles (at 60% depth of discharge), far exceeding the typical 500 cycles of conventional batteries.

Can a 100Ah LiFePO4 battery be connected in parallel?

Many of the 100Ah LiFePO4 batteries available can be connected in parallel with no limits, and up to 5 in series for higher voltage needs (e.g., 24V, 48V systems). What is the lifespan of a 100Ah LiFePO4 lithium battery?

How does a 51.2v 100Ah LiFePO4 battery work?

In a 51.2V 100Ah LiFePO4 battery, multiple cells are connected in series and parallel combinations to achieve the desired voltage and capacity. The cells are placed in a battery case, and an electrolyte is added. The electrolyte is usually a lithium salt based solution dissolved in an organic solvent.

What is a LiFePO4 battery?

Introduction The 51.2V 100Ah LiFePO4 (Lithium Iron Phosphate) battery has emerged as a significant power storage solution in various applications, ranging from renewable energy systems to electric vehicles and industrial backup power.

What is lithium iron phosphate (LiFePO4)?

Lithium Iron Phosphate (LiFePO4) battery cells are quickly becoming the go-to choice for energy storage across a wide range of industries.

What is lithium iron phosphate battery?

Lithium iron phosphate battery is lithium ion batteries that use lithium iron phosphate as the cathode material. Such as LiFePO4 battery. Lithium iron phosphate battery has the advantages of high safety, long cycle life, multiplier discharge, high temperature resistance, etc. It is considered as a new generation of lithium battery.

What is lithium phosphate battery used for?

Energy storage system: lithium iron phosphate batteries are widely used in the field of electric power storage, and can be used in distributed energy systems such as wind power generation and solar power generation. Light electric vehicles: including electric locomotives, electric bicycles, recreational vehicles, golf carts and so on.

What is the capacity of a lithium phosphate battery?

Common lithium iron phosphate battery packs have a capacity of 10ah, 20ah, 40ah, 50ah, 100ah, 200ah, 400ah and so on. What is the working principle of 12v LFP battery?

What is a high temperature lithium iron phosphate battery?

High temperature performance Lithium iron phosphate batteries can reach 350-500 ℃ peak thermal value, a wide range of operating temperatures (-20 ~ +75 ℃), high temperature (60 ℃) can still release 100% capacity. Fast charging Using special charger, 1.5C charging can make the battery full in 40 minutes.

What is the voltage vs State of charge of a lithium iron phosphate (LiFePO4) battery?

Here's a general voltage vs. state of charge (SoC) relationship for a typical lithium iron phosphate (LiFePO4) battery used in a 12V system: Charge Phase: 100% SoC corresponds to a fully charged battery, and the voltage typically ranges from around 13.8V to 14.6V. As the battery discharges, the SoC decreases, and the voltage gradually drops.

Is lithium iron phosphate a good cathode material?

You have full access to this open access article Lithium iron phosphate (LiFePO 4, LFP) has long been a key player in the lithium battery industry for its exceptional stability, safety, and cost-effectiveness as a cathode material.

What is the global market for lithium-ion batteries?

The global market for Lithium-ion batteries is expanding rapidly. We take a closer look at new value chain solutions that can help meet the growing demand.

Why are businesses investing in the UK battery supply chain?

Given the high forecast demand for batteries over the coming years, businesses are investing significantly in the UK battery supply chain. In 2023, we have already secured 52GWh in planned capacity for the UK – over halfway to meeting 2030 demand.

How much phosphate will a LFP battery produce in 2025?

orecasts we would expect c.500GWh of LFP battery demand in 2025E and 960GWh by 2030E. Even assuming some residual production using the Turner process by 2025E, that would sti l translate into over 50Mtpa of 30% P2O5 concentrate and nearly double that by 2030E. That's a lot of phosphate!A large investment will also

How will the lithium-ion battery market evolve?

Advances in both lithium-ion batteries and their alternatives are creating opportunities to electrify other applications and sectors. However, there are competing forces that will affect how the market evolves: Consolidation: Lithium-ion batteries are likely to undergo further improvements that extend their prevalence into the near future.

How does an electric arc furnace produce lithium iron phosphate?

arbonate (or hydroxide) in an Electric Arc Furnace to produce lithium iron phosphate. Since an EAF is used, the LFP production process is relatively power-intensive, which increasingly is likely to need to come from clean sources to satisfy the ESG requirements of the auto industry.from what, up until now, have been low cost, abundant raw mate

What is a lithium iron phosphate battery collector?

Current collectors are vital in lithium iron phosphate batteries; they facilitate efficient current conduction and profoundly affect the overall performance of the battery. In the lithium iron phosphate battery system, copper and aluminum foils are used as collector materials for the negative and positive electrodes, respectively.

What is a lithium iron phosphate battery?

These batteries have found applications in electric vehicles, renewable energy storage, portable electronics, and more, thanks to their unique combination of performance and safety The chemical formula for a Lithium Iron Phosphate battery is: LiFePO4.

What is lithium iron phosphate (LFP) battery?

Lithium Iron Phosphate (LiFePO4 or LFP) batteries are a type of rechargeable lithium-ion battery known for their high energy density, long cycle life, and enhanced safety characteristics. Lithium Iron Phosphate (LiFePO4) batteries are a promising technology with a robust chemical structure, resulting in high safety standards and long cycle life.

Can lithium iron phosphate batteries be improved?

Although there are research attempts to advance lithium iron phosphate batteries through material process innovation, such as the exploration of lithium manganese iron phosphate, the overall improvement is still limited.

What is a lithium iron phosphate (LiFePO4) battery?

Lithium Iron Phosphate (LiFePO4) batteries are a promising technology with a robust chemical structure, resulting in high safety standards and long cycle life. Their cathodes and anodes work in harmony to facilitate the movement of lithium ions and electrons, allowing for efficient charge and discharge cycles.

How do LiFePO4 batteries work?

LiFePO4 batteries operate on the principles of electrochemistry, involving the movement of lithium Irons between the cathode and anode during charge and discharge cycles. At the anode (negative electrode), during charging, lithium Irons are extracted from the cathode material (LiFePO4) and intercalated into the anode material, typically graphite.

How to repair a lithium ion battery?

It depends on the cause (of battery failure). If the battery is not physically damaged, or not moisture infected, and hasn't aged excessively, The lithium-ion battery can be restored using several techniques like slow charging, parallel charging, using a battery repair device et cetera.

How to solve a lithium battery problem?

The slow charging method is by far the easiest and safest way to solve lithium battery problems. You have to use the same battery to apply only a low current for the slow charge. The slow charge method is a docile approach in which you gradually restore the battery's functionality.

How do you charge a Li-ion battery without a protection circuit?

Never charge or discharge Li-ion batteries unattended without a working protection circuit. Each cell must be monitored individually with a protection circuit. Include a temperature sensor that disrupts the current should the pack get hot. Apply a slow charge to a repaired pack to bring all cells to parity.

Why does a lithium ion battery need a deep discharge?

Deep discharges lower down the internal chemistry of the cell making it hard to fix lithium ion battery issues. With the increase in age, the capacity reduces gradually. Physical damage like swelling or leaks might reduce the lifespan of a lithium battery and takes it beyond repair.

Can a lithium ion battery be fixed?

Swelling is one of the very first signs that a lithium-ion battery cannot be fixed. This swelling is a sure indication the battery has internal damage, such as too much gas or an overheating of the battery. If your battery is swollen, do not use it or charge it. Trying to repair a battery in this condition can cause it to break or even explode.

How to revive a lithium-ion battery?

The jump-starting lithium battery is one of the most preferable methods to enable the battery, but the application of this idea should be done carefully to avoid creating any kind of safety hazards. A battery-repair device is a more sophisticated way of reviving a lithium-ion battery.

Are lithium iron phosphate batteries a good energy storage solution?

Lithium iron phosphate (LFP) batteries have emerged as one of the most promising energy storage solutions due to their high safety, long cycle life, and environmental friendliness.

What is lithium iron phosphate battery?

Lithium iron phosphate battery has a high performance rate and cycle stability, and the thermal management and safety mechanisms include a variety of cooling technologies and overcharge and overdischarge protection. It is widely used in electric vehicles, renewable energy storage, portable electronics, and grid-scale energy storage systems.

Can lithium iron phosphate batteries be reused?

Recovered lithium iron phosphate batteries can be reused. Using advanced technology and techniques, the batteries are disassembled and separated, and valuable materials such as lithium, iron and phosphorus are extracted from them.

What is a lithium iron phosphate battery circular economy?

Resource sharing is another important aspect of the lithium iron phosphate battery circular economy. Establishing a battery sharing platform to promote the sharing and reuse of batteries can improve the utilization rate of batteries and reduce the waste of resources.

Can lithium manganese iron phosphate improve energy density?

In terms of improving energy density, lithium manganese iron phosphate is becoming a key research subject, which has a significant improvement in energy density compared with lithium iron phosphate, and shows a broad application prospect in the field of power battery and energy storage battery .

What is a lithium iron phosphate battery overcharge protection mechanism?

The overcharge protection mechanism plays a crucial role in sophisticated management strategies for lithium iron phosphate batteries . Its primary purpose is to prevent the battery from receiving more power than it is designed to withstand during charging.

Who inaugurated pH's first lithium-iron phosphate batteries factory?

Manila Bulletin Philippines National Marcos inaugurates PH's first lithium iron phosphate batteries factory President Marcos has inaugurated the Philippines' first manufacturing plant for lithium-iron-phosphate batteries, which, he said, sets the stage for the country to become a key player in clean energy storage in Southeast Asia.

Who is funding a lithium-iron-phosphate battery plant in the Philippines?

It's funded by the StB Capital Partners, a venture capital firm based in Brisbane, Australia. It will start its commercial operations next month. President Marcos has inaugurated the Philippines' first manufacturing plant for lithium-iron-phosphate batteries, which, he said, sets the stage for the country...

Is the Philippines a reliable supplier of lithium batteries?

A perfect fit for the renewable energy transition by positioning the Philippines as a reliable supplier of lithium batteries. We're putting the country on the map as a clean energy leader in Southeast Asia. This aligns seamlessly with the nation's shift to renewables, creating jobs, boosting exports and reinforcing energy security,” Ibarra noted.

Where is lithium iron phosphate (LFP) battery made?

Image: Philippine Board of Investments An Australian-funded lithium iron phosphate (LFP) battery gigafactory has hit go on its production line in the Philippines, 113 kilometres northwest of Manila in the Filinvest Innovation Park (FIP), New Clark City.

Why should the Philippines invest in LiFePO4 batteries?

The factory's focus on LiFePO4 batteries, known for their safety and longevity, positions the Philippines as a key player in Southeast Asia's clean energy storage market. It is expected to play a pivotal role in meeting the country's renewable energy goals and the development of a local EV industry

Who funds Phlippine's first lithium battery factory?

The Phlippine's first lithium battery factory is funded by Australian equity firm, StB Capital Partners. This content is protected by copyright and may not be reused. If you want to cooperate with us and would like to reuse some of our content, please contact: [email protected].

Why is voltage chart important for lithium ion phosphate (LiFePO4) batteries?

Voltage chart is critical in determining the performance, energy density, capacity, and durability of Lithium-ion phosphate (LiFePo4) batteries. Remember to factor in SOC for accurate reading and interpretation of voltage. However, please abide by all safety precautions when dealing with all kinds of batteries and electrical connections.

What is a lithium iron phosphate battery?

Lithium Iron Phosphate batteries also called LiFePO4 are known for high safety standards, high-temperature resistance, high discharge rate, and longevity. High-capacity LiFePO4 batteries store power and run various appliances and devices across various settings.

What is the voltage of a lithium phosphate battery?

Every lithium iron phosphate battery has a nominal voltage of 3.2V, with a charging voltage of 3.65V. The discharge cut-down voltage of LiFePO4 cells is 2.0V. Here is a 3.2V battery voltage chart. Thanks to its enhanced safety features, the 12V is the ideal voltage for home solar systems.

What is the energy storage capacity of a LiFePO4 battery?

The energy storage capacity of a LiFePO4 battery is directly related to its voltage. The higher the voltage, the more energy the battery can store. For example, a battery that is charged to 3.6V can store more energy than one that is charged to 3.4V.

Why is voltage important in a LiFePO4 battery?

Therefore, it's crucial to ensure that the battery voltage remains within the recommended range to achieve optimal device performance. The energy storage capacity of a LiFePO4 battery is directly related to its voltage. The higher the voltage, the more energy the battery can store.

Why is the LiFePO4 voltage chart important?

In conclusion, understanding the LiFePO4 voltage chart is essential to maintain the battery's performance, energy storage, and lifespan. The chart shows that a small change in SOC can have a significant effect on the battery voltage. The voltage also affects the battery's power delivery, energy storage, and overall lifespan.

Can sodium iron phosphate be used in sodium ion energy storage batteries?

Therefore, future research on sodium iron phosphate must be a breakthrough in the synthesis method, in order to make it expected to be used on a large scale in sodium ion energy storage batteries.

Are lithium iron phosphate batteries the future of solar energy storage?

Let's explore the many reasons that lithium iron phosphate batteries are the future of solar energy storage. Battery Life. Lithium iron phosphate batteries have a lifecycle two to four times longer than lithium-ion. This is in part because the lithium iron phosphate option is more stable at high temperatures, so they are resilient to over charging.

Are lithium ion batteries the new energy storage solution?

Lithium ion batteries have become a go-to option in on-grid solar power backup systems, and it's easy to understand why. However, as technology has advanced, a new winner in the race for energy storage solutions has emerged: lithium iron phosphate batteries (LiFePO4).

What are lithium iron phosphate batteries (LiFePO4)?

However, as technology has advanced, a new winner in the race for energy storage solutions has emerged: lithium iron phosphate batteries (LiFePO4). Lithium iron phosphate use similar chemistry to lithium-ion, with iron as the cathode material, and they have a number of advantages over their lithium-ion counterparts.

Are lithium iron phosphate backup batteries better than lithium ion batteries?

When needed, they can also discharge at a higher rate than lithium-ion batteries. This means that when the power goes down in a grid-tied solar setup and multiple appliances come online all at once, lithium iron phosphate backup batteries will handle the load without complications.

Why should you use lithium iron phosphate batteries?

Additionally, lithium iron phosphate batteries can be stored for longer periods of time without degrading. The longer life cycle helps in solar power setups in particular, where installation is costly and replacing batteries disrupts the entire electrical system of the building.

Can lithium iron phosphate batteries be improved?

Although there are research attempts to advance lithium iron phosphate batteries through material process innovation, such as the exploration of lithium manganese iron phosphate, the overall improvement is still limited.

Is lithium iron phosphate a successful case of Technology Transfer?

In this overview, we go over the past and present of lithium iron phosphate (LFP) as a successful case of technology transfer from the research bench to commercialization. The evolution of LFP technologies provides valuable guidelines for further improvement of LFP batteries and the rational design of next-generation batteries.

Should lithium iron phosphate batteries be recycled?

Learn more. In recent years, the penetration rate of lithium iron phosphate batteries in the energy storage field has surged, underscoring the pressing need to recycle retired LiFePO 4 (LFP) batteries within the framework of low carbon and sustainable development.

How does CEO affect a lithium iron phosphate battery?

For example, the coating effect of CeO on the surface of lithium iron phosphate improves electrical contact between the cathode material and the current collector, increasing the charge transfer rate and enabling lithium iron phosphate batteries to function at lower temperatures .

What is lithium iron phosphate battery?

Lithium iron phosphate battery has a high performance rate and cycle stability, and the thermal management and safety mechanisms include a variety of cooling technologies and overcharge and overdischarge protection. It is widely used in electric vehicles, renewable energy storage, portable electronics, and grid-scale energy storage systems.

Are lithium iron phosphate batteries good for EVs?

In addition, lithium iron phosphate batteries have excellent cycling stability, maintaining a high capacity retention rate even after thousands of charge/discharge cycles, which is crucial for meeting the long-life requirements of EVs. However, their relatively low energy density limits the driving range of EVs.

How big is lithium iron phosphate batteries market?

Lithium Iron Phosphate Batteries Market Size is valued at USD 17.54 Bn in 2023 and is predicted to reach USD 48.95 Bn by the year 2031 What is the Lithium Iron Phosphate Batteries Market Growth? Lithium Iron Phosphate Batteries Market expected to grow at a 13.85% CAGR during the forecast period for 2024-2031.

What is the market share of lithium iron phosphate (LFP) batteries in 2024?

Published by Statista Research Department, Oct 14, 2024 Lithium iron phosphate (LFP) batteries accounted for a 34 percent share of the global electric vehicle battery market in 2022. This figure is forecast to increase up to 39 percent by 2024.

What is the global lithium iron phosphate (LiFePO4) battery market size?

The global lithium iron phosphate (LiFePO4) battery market size was estimated at USD 8.25 billion in 2023 and is expected to expand at a compound annual growth rate (CAGR) of 10.5% from 2024 to 2030.

Why are lithium iron phosphate batteries so popular?

Rising popularity of Lithium Iron Phosphate batteries (LiFePO4 or LFP) can be attributed to multiple factors, including long cycle life and high-power density are driving revenue growth of the market. Compared to other battery types, Lithium Iron Phosphate (LFP) batteries have a longer lifespan.

Will lithium iron phosphate batteries market grow in 2024-2031?

Lithium Iron Phosphate Batteries Market expected to grow at a 13.85% CAGR during the forecast period for 2024-2031. Who are the key players in Lithium Iron Phosphate Batteries Market?

What is a lithium iron phosphate (LFP) battery?

Lithium iron phosphate (LFP) batteries accounted for a 34 percent share of the global electric vehicle battery market in 2022. This figure is forecast to increase up to 39 percent by 2024. LFP chemistry had a 36 percent improvement rate for EV battery applications in 2023, making this battery type a front-runner in the global EV battery market.

Can a hybrid solar–wind power plant benefit from battery energy storage?

This study aims to propose a methodology for a hybrid wind–solar power plant with the optimal contribution of renewable energy resources supported by battery energy storage technology. The motivating factor behind the hybrid solar–wind power system design is the fact that both solar and wind power exhibit complementary power profiles.

Is battery energy storage a good choice for renewable power applications?

Currently, battery energy storage technology is considered as one of the most promising choices for renewable power applications. This research targets at battery storage technology and proposes a generic methodology for optimal capacity calculations for the proposed hybrid wind–solar power system.

Are LiFePO4 batteries good for solar applications?

LiFePO4 batteries, renowned for their long cycle life, high energy density, safety, and environmental friendliness, have proven to be an ideal complement to solar systems. This article delves into the various aspects of LiFePO4 batteries in solar applications, exploring their working principles, benefits, challenges, and future prospects.

Can a hybrid power plant containing wind and solar power mix match load demand?

In this paper, a hybrid structure of a renewable power plant containing wind and solar generation mix coupled with an optimal BESS capacity has been proposed. This design is able to optimally match load demand at a particular region with the optimal renewable resource allocation at minimum cost.

Should hybrid wind-solar power plants be integrated into electricity grids?

Advantageous combination of wind and solar with optimal ratio will lead to clear benefits for hybrid wind–solar power plants such as smoothing of intermittent power, higher reliability, and availability. However, the potential challenges for its integration into electricity grids cannot be neglected.

How to maintain the reliability of the proposed hybrid generation?

In addition, the reliability of the proposed hybrid generation is maintained by the introduction of BESS and the set-up of the optimisation problem through ( 2) and ( 9 ), which keeps the generation–demand matching even in times of power deficit using the stored energy from the BESS.

Are lithium ion batteries safe?

Other lithium-ion battery chemistries, such as lithium cobalt oxide (LiCoO2) and lithium manganese oxide (LiMn2O4), have a high level of safety. Still, they have a higher risk of thermal runaway and overheating than LiFePO4 batteries.

Are lead-acid batteries better than lithium iron phosphate batteries?

Many still swear by this simple, flooded lead-acid technology, where you can top them up with distilled water every month or so and regularly test the capacity of each cell using a hydrometer. Lead-acid batteries remain cheaper than lithium iron phosphate batteries but they are heavier and take up more room on board.

Are LiFePO4 batteries safe?

LiFePO4 batteries are known for their high level of safety compared to other lithium-ion battery chemistries. They have a lower risk of overheating and catching fire due to their more stable cathode material and lower operating temperature. We have also mentioned this in our best LiFePO4 battery list.

Are lithium ion batteries a good choice?

One of the most attractive features of Lithium-ion batteries is their quick charging time compared to traditional lead acid batteries, making them an attractive option for those who work and live aboard. Credit: Cultura Creative RF/Alamy Credit: Cultura Creative RF/Alamy Lithium iron phosphate batteries: myths BUSTED!

Are rechargeable lithium batteries a fire hazard?

Rechargeable lithium batteries have become an essential part of modern life, powering everything from portable electronics to solar energy systems. However, they are often surrounded by safety concerns—one of the most persistent myths being that these batteries pose a significant fire hazard.

What is a LiFePO4 battery?

A Comprehensive Guide LiFePO4 batteries, also known as lithium iron phosphate batteries, are rechargeable batteries that use a cathode made of lithium iron phosphate and a lithium cobalt oxide anode. They are commonly used in a variety of applications, including electric vehicles, solar systems, and portable electronics.

What is a lithium iron phosphate battery life cycle test?

Charge–discharge cycle life test Ninety-six 18650-type lithium iron phosphate batteries were put through the charge–discharge life cycle test, using a lithium iron battery life cycle tester with a rated capacity of 1450 mA h, 3.2 V nominal voltage, in accordance with industry rules.

Are lithium iron phosphate batteries safe?

These lithium iron phosphate batteries are renowned for their high energy density, long cycle life, and excellent safety profile. However, before integrating them into your project, it's crucial to test them to ensure they are functioning correctly and to detect any defects or issues early on.

Why is battery management important for a lithium iron phosphate (LiFePO4) battery system?

Battery management is key when running a lithium iron phosphate (LiFePO4) battery system on board. Victron's user interface gives easy access to essential data and allows for remote troubleshooting.

How many battery samples failed a lithium iron battery test?

Part of the charge–discharge cycle curve of lithium iron battery. According to the testers record, ninety-six battery samples failed (when the battery capacity is less than 1100 mA h). The cycles are listed in Table 2 in increasing order, equivalent to the full life cycle test.

How to test a LiFePO4 battery?

If you identify any defects or issues, contact the manufacturer immediately. To perform these tests, you'll need the following tools: Multimeter: For measuring the voltage of your LiFePO4 cells. Battery Capacity Tester: To test the capacity of your LiFePO4 cells. Safety Equipment: Always prioritize safety.

Do lithium iron phosphate batteries degrade battery performance based on charge-discharge characteristics?

For this purpose, the paper built a model of battery performance degradation based on charge–discharge characteristics of lithium iron phosphate batteries . The model was applied successfully to predict the residual service life of a hybrid electrical bus.

Which battery is best for telecom base station backup power?

Among various battery technologies, Lithium Iron Phosphate (LiFePO4) batteries stand out as the ideal choice for telecom base station backup power due to their high safety, long lifespan, and excellent thermal stability.

What is a lithium iron phosphate (LiFePO4) battery?

Lithium Iron Phosphate (LiFePO4) batteries are a type of lithium-ion battery with a lithium iron phosphate cathode and typically a graphite anode. Compared to traditional lead-acid batteries or other lithium-ion batteries (such as ternary lithium batteries), LiFePO4 batteries offer several notable advantages:

What makes a telecom battery pack compatible with a base station?

Compatibility and Installation Voltage Compatibility: 48V is the standard voltage for telecom base stations, so the battery pack's output voltage must align with base station equipment requirements. Modular Design: A modular structure simplifies installation, maintenance, and scalability.

How many LiFePO4 cells are in a 48V 100Ah battery pack?

1. Battery Pack Structure Design Cell Selection: A 48V 100Ah battery pack is typically composed of 15 or 16 LiFePO4 cells (each with a nominal voltage of 3.2V) connected in series. The cell capacity, such as 100Ah, can be achieved through direct parallel connection or modular design.