Browse technical resources about lithium batteries, energy storage, and smart power systems.
Lithium-ion batteries power everything from smartphones to electric vehicles today, but safer and better alternatives are on the horizon. Li-on batteries have a number of drawbacks, which have affected everything from iPhone production to the viability of electric cars. Some of these problems include: 1. Let's start with a battery technology that doesn't stray too far from the Li-on baseline we're familiar with. Sodium-ion batteries simply replace lithium ions as charge carriers with sodium. This single change has a big impact on battery production as sodium is far. A lithium-ion battery uses cobalt at the anode, which has proven difficult to source. Lithium-sulfur (Li-S) batteries could remedy this problem. Lithium-ion batteries use a liquid electrolyte medium that allows ions to move between electrodes. The electrolyte is typically an organic.
[PDF Version]Alternatives to lithium batteries include magnesium batteries, seawater batteries, nickel-metal hydride (NiMH), lead-acid batteries, sodium-ion cells, and solid-state batteries. These options offer varying benefits in cost, safety, and environmental impact, presenting potential solutions for diverse energy storage needs.
To find promising alternatives to lithium batteries, it helps to consider what has made the lithium battery so popular in the first place. Some of the factors that make a good battery are lifespan, power, energy density, safety and affordability.
However, most of the alternative battery technologies considered have a lower energy density than lithium-ion batteries, which is why a larger quantity of raw materials is typically required to achieve the same storage capacity.
Their capacity, rechargeability, and price make them ideal for both consumer and industrial applications. However, the advent of renewable energy equipment, electric vehicles, and the issues surrounding lithium extraction and safety are forcing markets to find batteries independent of the alkali metal.
The good news is that US scientists have begun exploring a promising new alternative in sodium-ion batteries. But this comes with its own set of challenges. "The biggest advantage is just the sodium itself. Compared to the lithium, it's much more abundant, and cheaper," Lee said. "It's everywhere."
Magnesium batteries are emerging as a promising alternative to traditional lithium-ion batteries. Magnesium, being a divalent cation, can move twice the charge per ion, potentially doubling the energy density. This means that magnesium batteries could store more energy in the same amount of space.
Discover top LiFePO4 battery brands and models for lasting power. Featured brands include Redway, SOK, Li Time, and Battleborn, offering reliable energy storage for electric cars and solar setups.
Contemporary Amperex Technology Co., Limited. (CATL), BYD Company Ltd., Gotion High tech Co Ltd, CALB, EVE Energy Co., Ltd., LG Energy Solution, Panasonic Corporation, Tianjin Lishen Battery Joint-Stock Co., Ltd., and SAMSUNG SDI CO., LTD. among others, are the top lithium iron phosphate batteries companies in the global market.
The new generation lithium iron phosphate battery system supports the range of 700km of supporting models; The new generation of ternary battery system supports the range of 1000km of supporting models. Liu Jingyu, chairman of CALB, said that the construction capacity of CALB lithium Iron phosphate battery will reach more than 100GWh this year.
Lithium-ion batteries, lithium primary batteries, and electronic cigarettes are a few of the company's top sellers. By creating premium materials and next-generation batteries, LG Energy Solutions is a market leader in the environmentally-friendly energy sector. The company, a leading manufacturer of chemical-based batteries in the world.
Among them, from January to August, the global lithium iron phosphate battery consumption of TOP10 enterprises reached 181.7gwh, accounting for 94.63%. The top 10 global battery users from January to November are CATL, LG Chem, Panasonic, BYD, SKI, Samsung SDI, AVIC lithium, Gotion High-tech, AESC and PEVE.
With 13 years professional lithium experience,strong R&D team,complete certification, Keheng lithium iron phosphate battery owned 229 core technologies and software copyrights,as a leading solution and product supplier in China.
In terms of the latest developments, CALB lithium Iron phosphate battery recently released a new generation of battery, which applies many new technologies and is based on the design concept of one stop.
Cathode: This is the positive electrode that determines the battery's capacity and voltage. Materials like nickel, cobalt, manganese, or iron phosphate are used here.
Lithium metal was used as a negative electrode in LiClO 4, LiBF 4, LiBr, LiI, or LiAlCl 4 dissolved in organic solvents. Positive-electrode materials were found by trial-and-error investigations of organic and inorganic materials in the 1960s.
All-solid-state lithium secondary batteries are attractive owing to their high safety and energy density. Developing active materials for the positive electrode is important for enhancing the energy density. Generally, Co-based active materials, including LiCoO 2 and Li (Ni 1–x–y Mn x Co y)O 2, are widely used in positive electrodes.
Developing active materials for the positive electrode is important for enhancing the energy density. Generally, Co-based active materials, including LiCoO 2 and Li (Ni 1–x–y Mn x Co y)O 2, are widely used in positive electrodes. However, recent cost trends of these samples require Co-free materials.
It is not clear how one can provide the opportunity for new unique lithium insertion materials to work as positive or negative electrode in rechargeable batteries. Amatucci et al. proposed an asymmetric non-aqueous energy storage cell consisting of active carbon and Li [Li 1/3 Ti 5/3]O 4.
This mini-review discusses the recent trends in electrode materials for Li-ion batteries. Elemental doping and coatings have modified many of the commonly used electrode materials, which are used either as anode or cathode materials. This has led to the high diffusivity of Li ions, ionic mobility and conductivity apart from specific capacity.
Recent trends and prospects of anode materials for Li-ion batteries The high capacity (3860 mA h g −1 or 2061 mA h cm −3) and lower potential of reduction of −3.04 V vs primary reference electrode (standard hydrogen electrode: SHE) make the anode metal Li as significant compared to other metals, .
Here's what happens:After multiple charge cycles, factors such as temperature, usage patterns, and complete discharges cause degradation of the battery's chemical components. With each cycle, the battery's capacity diminishes slightly, affecting its longevity.
Capacity Loss: Over time, unused lithium batteries can lose their ability to hold a charge. This means that when you finally decide to use the battery, it might not last as long as it would have if it had been used regularly. The passivation layer that forms on the electrodes can contribute to this loss of capacity.
If left unused for months, a fully charged lithium battery can become completely depleted. Capacity Loss: Over time, unused lithium batteries can lose their ability to hold a charge. This means that when you finally decide to use the battery, it might not last as long as it would have if it had been used regularly.
When a lithium battery degrades, end users will notice lower capacity and reduced power capability. This means the battery will both die faster and charge more slowly than it did when it was brand new from the manufacturer. Do you speak battery? A roundup of terms, concepts, and acronyms to amp up your fluency.
As with fast charging, overcharging a lithium-ion battery can result in lithium plating, which kicks off a rapid, snowball effect of degradation. It's worth noting that the anode can sometimes degrade more rapidly than the cathode.
Fast charging Though it may sound advantageous, fast charging contributes to accelerated lithium-ion battery degradation, because if you charge a lithium-ion battery too fast, you risk lithium plating. Lithium plating causes even more severe degradation than SEI does.
That explains the 10 years. When people read “lithium battery”, most think of lithium-ion rechargeable, so called secondary cells. Hence both mine and Cristobols comments/answers. Your battery will degrade in storage, certainly significantly in 15 years. How much depends on conditions. The mechanisms of lithium-ion degradation are shown here.
LiFePO4 batteries do not require active cooling under normal operating conditions; however, they should be kept in well-ventilated areas away from direct heat sources.
In general, a lithium iron phosphate option will outperform an equivalent SLA battery. They operate longer, recharge faster and have much longer lifespans than SLA batteries. But how do these two compare when exposed to cold weather? How Does Cold Affect Lithium Iron Phosphate Batteries?
At 0°F, lithium discharges at 70% of its normal rated capacity, while at the same temperature, an SLA will only discharge at 45% capacity. What are the Temperature Limits for a Lithium Iron Phosphate Battery? All batteries are manufactured to operate in a particular temperature range.
All batteries are manufactured to operate in a particular temperature range. On the lithium side, we'll use our X2Power lithium batteries as an example. These batteries are built to perform between the temperatures of -4°F and 140°F. A standard SLA battery temperature range falls between 5°F and 140°F.
Lithium iron phosphate batteries are a type of rechargeable battery made with lithium-iron-phosphate cathodes. Since the full name is a bit of a mouthful, they're commonly abbreviated to LFP batteries (the “F” is from its scientific name: Lithium ferrophosphate) or LiFePO4.
But taken overall, lithium iron phosphate battery lifespan remains remarkable compared to its EV alternatives. While studies show that EVs are at least as safe as conventional vehicles, lithium iron phosphate batteries may make them even safer.
By Reg Nicoson Lithium batteries contain no water, so temperature limitations based on the freezing temperature of water are misleading at best. The REAL freezing point of a lithium battery would be associated with the electrolyte freezing point which is less than -60°C.
A Battery Management System (BMS) is the brain of your lithium battery. It's an electronic control circuit that monitors and protects your battery cells from damage while optimizing their performance. It continuously monitors the battery's performance, health, temperature, charging state, and electrical output, and steps in automatically when corrective action is needed.
The components of most (Li-ion or sodium-ion [Na-ion]) batteries you use regularly include:Electrodes (cathode, or positive end and anode, or negative end)Electrolytes, which are generally liquid solutionsA separator, which keeps electrodes and electrolytes separate and is made of metalA current collector, which stores the energy.
The battery energy storage system's (BESS) essential function is to capture the energy from different sources and store it in rechargeable batteries for later use. Often combined with renewable energy sources to accumulate the renewable energy during an off-peak time and then use the energy when needed at peak time.
Batteries are increasingly being used for grid energy storage to balance supply and demand, integrate renewable energy sources, and enhance grid stability. Large-scale battery storage systems, such as Tesla's Powerpack and Powerwall, are being deployed in various regions to support grid operations and provide backup power during outages.
These next-generation batteries may also use different materials that purposely reduce or eliminate the use of critical materials, such as lithium, to achieve those gains. The components of most (Li-ion or sodium-ion [Na-ion]) batteries you use regularly include: A current collector, which stores the energy.
We explore cutting-edge new battery technologies that hold the potential to reshape energy systems, drive sustainability, and support the green transition.
Batteries play a crucial role in integrating renewable energy sources like solar and wind into the grid. By storing excess energy generated during periods of high production and releasing it during periods of low production, batteries help mitigate the intermittency of renewables and ensure a stable energy supply.
Similarly, for batteries to work, electricity must be converted into a chemical potential form before it can be readily stored. Batteries consist of two electrical terminals called the cathode and the anode, separated by a chemical material called an electrolyte. To accept and release energy, a battery is coupled to an external circuit.
A lithium-ion or Li-ion battery is a type of rechargeable battery that uses the reversible intercalation of Li + ions into electronically conducting solids to store energy.
The different lithium battery types get their names from their active materials. For example, the first type we will look at is the lithium iron phosphate battery, also known as LiFePO4, based on the chemical symbols for the active materials. However, many people shorten the name further to simply LFP. #1. Lithium Iron Phosphate
A lithium-ion or Li-ion battery is a type of rechargeable battery that uses the reversible intercalation of Li + ions into electronically conducting solids to store energy.
Today, LFP is commonly hailed as the best type of lithium-ion battery because of its durability, safety, long lifespan, high thermal stability, and wide operating range. However, other Li-ion battery types may be better suited for specific applications, such as electric vehicles or aerospace. What Are the Different Grades of Lithium-Ion Batteries?
The main components of a lithium-ion battery include the anode, cathode, electrolyte, and separator. The anode typically consists of graphite, while the cathode is made from materials like lithium cobalt oxide. When the battery charges, lithium ions move from the cathode through the electrolyte to the anode. This movement stores energy.
Obviously, you are familiar with different types of rechargeable batteries in your day-to-day electronics. Identically, a Li-ion battery is a rechargeable battery type made using lithium ions. If you think about the function, the lithium ions of the battery move from the negative electrode to the positive electrode when discharging.
Especially, two materials called cobalt and manganese are very popular for lithium-ion types. Let's get familiar with them. Cobalt Based: Cobalt-used lithium battery is the first version of lithium batteries. These batteries can save energy for a long time and discharge at a very low rate.
Recycling lithium-ion batteries to recover their critical metals has significantly lower environmental impacts than mining virgin metals, according to a new Stanford University lifecycle analysis published in Nature Communications. On a large scale, recycling could also help relieve the long-term supply insecurity – physically and geopolitically – of critical battery minerals.
EPA recommends that households who generate used lithium batteries treat them with care, isolate the terminals (e.g., cover the terminals with non-metallic tape while keeping the label legible, or individually bag batteries), and protect the batteries from damage.
On a large scale, recycling could also help relieve the long-term supply insecurity – physically and geopolitically – of critical battery minerals. Lithium-ion battery recyclers source materials from two main streams: defective scrap material from battery manufacturers, and so-called “dead” batteries, mostly collected from workplaces.
ScienceDaily. ScienceDaily, 31 January 2025. < / releases / 2025 / 01 / 250131194431.htm>. Researchers compared the environmental impacts of lithium-ion battery recycling to mining for new materials and found that recycling significantly outperforms mining in terms of greenhouse gas emissions, water use, and energy use.
As part of the ReCell Center, NREL is working with Argonne National Laboratory and Oak Ridge National Laboratory to improve direct recycling of lithium-ion batteries, which uses less energy and captures more of the critical materials.
Instead, EPA recommends that all household lithium batteries be dropped off at battery collection sites (e.g., often located at electronics retailers) or household hazardous waste collection facilities for proper management. The EPA Used Lithium-Ion Batteries web page offers resources to find a battery recycling location near you.
Lithium-ion battery recyclers source materials from two main streams: defective scrap material from battery manufacturers, and so-called “dead” batteries, mostly collected from workplaces. The recycling process extracts lithium, nickel, cobalt, copper, manganese, and aluminum from these sources.
Lithium-ion batteries play an important role in the life quality of modern society as the dominant technology for use in portable electronic devices such as mobile phones, tablets and laptops. Beyond this application lit. BMSBattery management systemCAESCompressed. Lithium-ion (Li-ion) batteries are well known power components of portable electronic devices such as smart phones, tablets and laptops. Nevertheless, these batteries can play a much bigg. EES systems convert electric power to another form of energy for storage, and then reconvert to electricity when required. EES can also be carried out directly, as in capacitors; these. Of all metals available for battery chemistry, lithium is considered to be the most promising. Apart of being widely available and non-toxic, it is very light and electropositive. T. Fig. 3 shows the production structure of the Li-ion battery industry, from raw materials to final applications. The value chain shows that the Li-ion battery sector engages a high number of in.
[PDF Version]Nonetheless, lithium-ion batteries are nowadays the technology of choice for essentially every application – despite the extensive research efforts invested on and potential advantages of other technologies, such as sodium-ion batteries [, , ] or redox-flow batteries [10, 11], for particular applications.
Accordingly, the choice of the electrochemically active and inactive materials eventually determines the performance metrics and general properties of the cell, rendering lithium-ion batteries a very versatile technology.
Conclusive summary and perspective Lithium-ion batteries are considered to remain the battery technology of choice for the near-to mid-term future and it is anticipated that significant to substantial further improvement is possible.
As a technological component, lithium-ion batteries present huge global potential towards energy sustainability and substantial reductions in carbon emissions. A detailed review is presented herein on the state of the art and future perspectives of Li-ion batteries with emphasis on this potential. 1. Introduction
However, lithium-ion batteries face limitations as a result of the low theoretical energy density of existing materials. Thus, many researchers have sought to investigate different ways to enhance the performance of batteries when used for practical applications.
Based on Table 4, the cumulative Li-ion battery market for the period 2020 to 2030 is approximately 2.5 TWh. With the current material intensity of 0.16 kg/kWh, the cumulative lithium demand for batteries would be 400,000 t, which is equivalent to 2.9% of current global reserves.
This comprehensive resource covers everything from the basics of Lithium-ion battery systems to the intricacies of safety, design, and regulatory requirements.
The products produced during this time are sorted according to the severity of the error. In summary, the quality of the production of a lithium-ion battery cell is ensured by monitoring numerous parameters along the process chain.
In addition, the transferability of competencies from the production of lithium-ion battery cells is discussed. The publication “Battery Module and Pack Assembly Process” provides a comprehensive process overview for the production of battery modules and packs.
Production steps in lithium-ion battery cell manufacturing summarizing electrode manufacturing, cell assembly and cell finishing (formation) based on prismatic cell format. Electrode manufacturing starts with the reception of the materials in a dry room (environment with controlled humidity, temperature, and pressure).
While there is not a specific OSHA standard for lithium-ion batteries, many of the OSHA general industry standards may apply, as well as the General Duty Clause (Section 5(a)(1) of the Occupational Safety and Health Act of 1970). These include, but are not limited to the following standards:
The U.S. should develop a federal policy framework that supports manufacturing electrodes, cells, and packs domestically and encourages demand growth for lithium-ion batteries. Special attention will be needed to ensure access to clean-energy jobs and a more equitable and durable supply chain that works for all Americans.
battery manufacturing and technology standards roadmapWith a mind on the overarching goal behind the roadmap recommendations to continue building an integrated, UK-wide, comprehensive battery standards infrastructure, supported by certification, testing and training regimes, and aligned with legislation/regulatory requirements; it is pro
Lead ions pass through the pores of the PbSO 4 layer. Pavlov proposed the following mechanism. The PbSO 4 layer acts as a semi-permeable membrane that allows H 2 O, H +, OH- and Pb 2+ ions to pass through but stops the large SO 4 2.
However, the passivation must also be considered when the battery is used for the first time. The passivation layer over the battery's anode obstructs the flow of current and thus provokes a drop in the operating voltage. With continuous operation, the passivation layer is gradually eroded, so the operating voltage raises to its normal level.
Passivation is a chemical term referring to the inherent phenomena observed within all Lithium Thionyl Chloride Primary cells whereby a high resistant film (Solid Electrolyte Interface -SEI) of Lithium Chloride (LiCL) is formed internally on the surface of the lithium anode within cells themselves.
ating each time the load is removed.The level of passivation is influenced by factors such as the current capacity of the cell, length of storage, storage temperature, discharge temperature, and prior discharge conditions, as removing the load from a partially discharged cell can impact passivation more
cells also feature an incredibly low2 self-discharge rate as low as 0.7% per year, largely due to harnessing the passivation efect, enabling certain low-power devices to work up ears on the original battery.LiSOCl2 batteries can be manufactured two ways, using a spir
Physical simulation of lithium-ion battery is crucial to consolidate the understanding of its operating mechanisms and, potentially, its state of health; nevertheless, a reliable model calibration is complex d. ••Different diagnostic techniques increase the identifiability of model. The lithium ion-battery (LIB) technology, featuring outstanding energy and power densities, satisfying lifetime, high round-trip efficiency, and continuously decreasing cost, rapidly bec. 2.1. Physical modelThe model used in this work is the DFN model, implemented in COMSOL Multiphysics®, already adopted in and here extended t. 3.1. Sensitivity analysis3.2. Case-study applicationThe proposed methodology will be hereby applied on a case-study, starting from the appropriate devel. This work developed and discussed an innovative method to obtain a widely reliable calibration of a state-of-art lithium-ion battery thermal-physical model. The method has bee.
[PDF Version]This paper proposed a framework for validating and identifying lithium-ion batteries' model parameters to enhance the accuracy of SOC estimation by reducing modeling errors in the N-order Thevenin equivalent circuit model. The proposed framework comprises two stages: (1) model verification, and (2) model parameter identification.
The results indicated that the specific heat of the batteries ranged from 870 to 1040 J kg -1 °C -1 at 25 °C. The specific heat of the batteries increased with temperature and exhibited less sensitivity to the state of charge (SOC), varying depending on the type of battery materials.
Fitting a numerical model with the experimental measurement is another method to measure the thermophysical parameters of a battery. Zhang et al. [100, 101] studied the specific heat and thermal conductivity of large-format pouch LIBs by applying the combined method.
The increasing adoption of batteries in a variety of applications has highlighted the necessity of accurate parameter identification and effective modeling, especially for lithium-ion batteries, which are preferred due to their high power and energy densities.
For a prismatic battery, the thermal network becomes even more complex to predict the thermophysical parameters and temperature. Cui et al. obtained the specific heat of a 50 Ah prismatic lithium battery to be 1060 J kg -1 °C -1 based on the lumped capacitance thermal model.
In literature, ARC and DSC were used to test the adiabatic thermal runaway characteristics of four types of lithium batteries. It was pointed out that the increase in size would lead to an increase in temperature difference within the battery, and the self-heating of the battery could be detected at 100 °C.
The types of solar batteries most used in photovoltaic installations are lead-acid batteries due to the price ratio for available energy. Its efficiency is 85-95%, while Ni-Cad is 65%.
Solar panel systems use four main types of solar batteries: lead-acid, lithium-ion, nickel-cadmium, and flow. Each battery type has different benefits and works for different scenarios. 1. Lithium-Ion Batteries The technology underpinning lithium-ion batteries is relatively recent compared to other battery types.
Currently, lithium-ion and LFP (which is technically a type of lithium-ion) batteries are the primary options for residential purposes, although there are ongoing efforts to make flow and saltwater batteries small and affordable enough for home applications.
Solar batteries can be divided into six categories based on their chemical composition: Lithium-ion, lithium iron phosphate (LFP), lead-acid, flow, saltwater, and nickel-cadmium.
Lead-acid solar batteries come in two different types. Sealed lead acid batteries are designed in a way that they reduce the release of toxic gas into the atmosphere, during their charging process. The second lead-acid battery type is flooded lead acid battery. This is like the bigger version of a traditional car battery.
Lithium-ion batteries offer a popular choice for solar energy systems due to their advanced technology and performance features. They provide efficient energy storage, making them well-suited for renewable energy applications. Higher Energy Density: Lithium-ion batteries store more energy in a smaller space compared to lead-acid batteries.
Flooded lead-acid batteries are a classic choice. They're reliable and cheap for off-grid and backup systems. But, they need regular checks and water top-ups. They also don't last as long as newer batteries, usually 3-5 years. Sealed lead-acid batteries, or AGM or gel batteries, are easier to use.
Power plant developer ACWA Power and the government of Azerbaijan have signed an agreement to potentially deploy a battery energy storage system (BESS) in the central Asian country.
The total power generation capacity of Azerbaijan is 8320.8 MW, the capacity of the power plants on renewable energy sources, including large HPPs is 1687.8 MW, which is 20.3 % of the total capacity.
According to the Ministry of Energy, the country's technical potential for small hydro is 520 MW, which could generate up to 3.2 TWh annually. Azerbaijan's Renewable Energy Agency under the Ministry of Energy (formerly SAARES) states that the country has up to 800 MW of geothermal energy potential.
Although hydropower is Azerbaijan's largest source of renewable energy today, its potential has not been fully exploited. According to the Ministry of Energy, the country's technical potential for small hydro is 520 MW, which could generate up to 3.2 TWh annually.
As Azerbaijan is relatively sunny, it has excellent solar power potential. According to the Ministry of Energy, technical potential is around 23 000 MW. The country's 2 400 to 3 200 sunshine hours annually compare well internationally, as does its solar intensity, estimated at 1 500 to 2 000 kWh/m 2.
Diversifying and improving the energy capacity of the country to ensure energy security. Azerbaijan has significant untapped renewable energy potential, as it is a relatively sunny and windy country, and it also has sizeable hydro, biomass and geothermal resources.
According to preliminary analysis, the total technical potential of wind energy in the Azerbaijani part of the Caspian Sea was estimated at 157 GW (35 GW in shallow water basins and 122 GW in deep water basins).
Never connect different batteries in parallel or similar batteries with different voltages. Doing so could compromise battery reliability or lead to explosions or excessive overheating.
One such configuration, wiring batteries in parallel, offers many advantages but also comes with its set of challenges. The term wiring batteries in parallel danger underscores the potential risks involved. This guide aims to navigate these waters, shedding light on the benefits and pitfalls of parallel battery configurations.
However, if you connect batteries with different voltages in parallel, they will try to equalize their voltages and this can damage them. If you connect multiple batteries in parallel, the overall voltage of the system will remain the same, but the capacity will increase. This is because each battery adds its own amp-hour (Ah) rating to the total.
Another thing to consider when using batteries in parallel is that they must be able to handle being discharged at the same rate. If one battery has a higher discharge rate than the other, it will likely end up doing most of the work and will die first.
The answer is yes, you can use mismatched batteries in parallel as long as they are the same type and voltage. However, there are a few things to keep in mind when doing so. First, it's important to remember that the capacity of your battery pack will be limited by the capacity of the lowest-capacity battery in the pack.
The following is the formula for connecting batteries in parallel: P= V*I/Rt where P is the power (in watts), V is the voltage of each battery (in volts), I is the current (in amps), and Rt is the total resistance of all batteries in series (in ohms).
Such rapid discharges can degrade a battery's lifespan by up to 30% over repeated occurrences. And with lithium batteries, which are known to be sensitive to temperature spikes, this could lead to more severe consequences like swelling or even combustion.
Contact our team for a free feasibility study, custom battery sizing, and a competitive quote.