Example Case of 20kw lithium ion battery ground mount solar system off/on grid

Battery Energy storage system(BESS), as an emerging market, provides inverters and battery manufacturers in China with opportunities to expand new businesses and change their position in the industry. Since 2018, China’s rapidly growing battery energy storage market is creating increasing equipment procurement needs and project development opportunities. Following this market trend, OSM electric is also actively developing new energy storage products for the energy storage market, including AC coupled inverter, single-phase energy storage inverter and three-phase lithium ion battery energy storage inverter. Here mainly introduces the design of single-phase energy storage inverter 5kW household LFP battery energy storage system.

What is household Home Battery energy storage system?

The structure of household Home Battery energy storage system includes: photovoltaic modules, energy storage batteries, energy storage inverters, grid-connected and metering equipment, public power grids, household loads applications and other important loads, etc.PV energy first meets important load electricity consumption, remaining energy charges the battery, and finally support to household load, and then to the grid.

The working principle

PV Sun
  • In the morning, PV energy will be supplied to the load first. The household load will consume PV generation to the maximum extent, and the remaining electricity will be stored in our LFP batteries. While insufficient light, the battery will make up for the power to the load.

  • In the afternoon, after meeting the household load consumption and the battery is full, the remaining electricity will be fed by on- grid.

  • In the absence of sunlight, the battery through the inverter turns to AC to meet the load.

  • If the battery fails to meet the demand of the load, the on-grid will supplement the load.

Product Performance

Intelligent and efficient
• Store surplus electricity and improve the efficiency of PHOTOVOLTAIC
• Bidirectional energy storage design, PV, on-grid power can charge the battery
• lithium-ion batteries LiFePo4 prismatic cell design packs
• Integrated charging control and inverter design
• Compatible with both off-grid and on-grid modes

Flexible operation
• Wi-fi/Ethernet /GPRS/RS485 various communication modes are available
• Peak and valley time periods can be set to automatically cut peak and valley filling
• Local/remote control via computer
• Capacitive keypad operation and LCD display more convenient and stable

Safe and reliable
• IP65 high protection grade, suitable for outdoor installation
• 3-stage / 2-stage charging control to ensure battery cycle life
• Natural heat dissipation to reduce failure rate

The system configuration

  • Components
    Select 18 pieces of 300Wp crystal silicon components, 9 pieces/series *2 connected in parallel to 1pc 5kW off-grid all-in-one inverter (single-phase), the inverter outputs 220V voltage and 50Hz sinusoidal alternating current, and the grid is connected through grid-connected metering box.

  • 19 inch 48v 100ah LFP battery rack solution
    According to the following table analysis commonly used total load for family day: 10.064 KW, battery: 51.2v, 100 ah battery 6 PCS, 6 in parallel by the 19inch rack solution connected to 5 KW inverter(on-off-grid all-in-one), battery capacity: 30.7 KWh, consider the depth of discharge (DOD = 70%) battery, battery conversion efficiency of 94%, actual usable capacity of: 20 KWh, can maintain the family electricity 2 days.

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Fill in the form and send us your requirment on the BESS specifications. We will get you a best solution and price quotation.

500Wh 2MWh containerization BESSESS
What are the Functions of Energy Storage Power Station2020-12-08T06:56:44+00:00

Functions of Energy Storage Power Station

■ Peak-Shaving Function
In one sense, store electric energy when it is surplus and output stored electric energy after inverting when it is insufficient. This is the basic function of storage system–Peak-shaving function.

■ Independent inverting function in emergency
When the power grid loses electric energy, storage system will be used as independent inverter power supply and provide AC electric power for important load constantly to ensure user’s requirement.

■ Accepting Debug Command From Power Grid Flexibly
Storage system will exchange information with Remote Terminal Units (RTU) of power grid and Supervisory Control And Data Acquisition (SCADA) flexibly and conveniently, it will accept dispatch from automatic dispatch monitoring system of electric grid, to realize telesignalling, telemeter, remote control and remote transfer. The whole process will abide by MODBUS RTU. The communication media maybe wireless or wired.

■ Dynamic, static power grid support and reactive power compensation
Storage system will achieve kinds of functions according to power grid dispatch command, which includes items as follows:

  • Provide needed active power for power grid;
  • Provide needed reactive power for power grid;
  • Realize low voltage cross, and enhance the stability of power grid.

Models We provide:

Model Normal
 216F80  0.6 mwh 768v  800 852v 680 160 240 100 5000w >0.95
 216F1600  1.2 mwh 768v  1,600 852v 680 320 480 200 5000w >0.95
 216F3200 2.4mwh 768 v  3,200 852v 680 640 960 400 5000w >0.95
 216F8000 6.1 mwh 768v  8,000 852v 680 1600 2400 1000 5000w >0.95
216F16000  12.28 mwh 768v  16,000 852v 680 3200 4800 2000 5000w >0.95
What makes it so special on using Lithium ion LFP battery for Solar Energy Storage2020-12-03T08:39:33+00:00

What makes it so special on using Lithium ion LFP battery for Solar Energy Storage.

The energy storage market is became large these days. no matter you live on grid or off grid. BESS 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 states pass self-consumption and other legislation that promotes the use of batteries.

Batteries in solar energy storage 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. Considerations for choosing a battery include cost, cycle life and installation and maintenance.

Lithium-ion LFP Battery

According to a U.S. Solar Energy Monitor report, lithium-ion batteries are the most common storage technology, regardless of application. There are three types: pouches such as in smartphones and tablets, cylindrical such as in power tools, and prismatic (which come in various shapes) such as in electronic vehicles. Prismatic types often have corrugated sides, which create air gaps between adjacent cells and can aid in cooling. The prismatic can have applications in solar energy storage, specifically lithium ion phosphate (LFP) batteries.

Cost: Deutsche Bank analysts estimated lithium-ion batteries at about $500/kWh at the end of 2014, but OSM as an OEM Lithium ion manufacturer  based said it’s closer to $450 to $550/kWh. Overall, from manufactuer price, it is very close to lead acid batteries. Part of this cost comes from needing a battery management system to monitor the voltage and temperature of each cell to prevent excessive charging and discharging. A BMS isn’t critical for other technologies like lead acid because the inverter or charger controller can handle the battery charging regime. However, some manufacturers note that, if sized correctly, lithium-ion cells can reduce the cost of peripheral devices like charge controllers, offsetting its higher initial price and lowering cost-of-ownership.


Cycling: Lithium-ion batteries can typically deliver more cycles in their lifetime than lead-acid. This makes them a good choice for applications when batteries are cycled to provide ancillary services to the grid such as energy smoothing or frequency and voltage support. The most important benefit lithium-ion provides for solar is its high charge and discharge efficiencies, which help harvest more energy. Lithium-ion batteries also lose less capacity when idle, which is useful in solar installations where energy is only used occasionally.

Replacement/maintenance: Lithium-ion batteries can be lighter and more self contained than lead-acid batteries, so may be easier to install and change out. They can be wall-mounted and located indoors or outdoors. They are solid, so don’t require refills or maintenance.

Disposal: Lithium-ion batteries can use organic or inorganic cells. Organic-based batteries are free from any toxins. Inorganic-based cells are much more difficult to dispose of. Inorganic lithium-ion is toxic so it must be disposed of properly. Manufacturers encourage recycling, but there is often a price. Spent lithium-ion cells have little commercial value. Lithium-ion manufacturing involves lengthy preparation and purification of the raw material. In recycling, the metal must go through a similar process again, so it’s often cheaper to mine virgin material than retrieve it from recycling.


Choosing the right battery

Use a sizing calculator
Battery sizing is essential but often overlooked by users and installers. Batteries in PV systems are routinely undersized due to cost or because the system loads were underestimated. It’s important to know the customer’s power needs and correctly plan. Many online calculators provided by battery manufacturers and other software simplifies determining battery capacity for load requirements.

BMS Tech

Consider cost of ownership
There are several factors that should be taken into account when determining the total cost of ownership over the life of the battery.
• Price: A battery with a low price is always attractive, but if low price comes at the expense of quality and battery life, the need for frequent battery replacements could boost the cost over time. That’s why it’s important to consider issues other than price when making the decision.
• Capacity: Battery capacity is important because it’s a measure of the amount of energy stored in the battery.
• Voltage: The battery bank voltage must be considered to ensure it matches the system requirements. The battery bank voltage is often determined by the inverter specifications if installing a DC-to-AC system or by the voltage of the loads in a DC system.
• Cycle Life: The most critical consideration is cycle life, which provides the number of discharge/charge cycles the battery can provide before capacity drops to a specified percentage of rated capacity. Batteries from different manufacturers may have the same capacity and energy content and be similar in weight. But design, materials, process and quality influence how long the battery will cycle.


OSM 5Kwh Lithium ion LFP battery moduler

The model is stackable flexible for different energy requirments. You can add more modulers to increase capacity and energy like 10Kwh or 20kwh

5000wh battery pack

  • Battery Type: Lithium ion LFP (Lithium Iron Phosphate Batteries)
  • Battery System Voltage: 48v ( 51.2v)
  • Total energy: 5 Kwh (5.12Kwh)
  • Capacity: 100 amp hour
  • Brand name: OSM Energy
  • Design installtion: Wall mounted (powerwall)


Battery ratings
The nameplate rating on a battery is the fully developed capacity, so it can be misleading to test a battery immediately after it is purchased because it may take up to 100+ cycles for it to reach its full capacity. Beware of batteries that promise full capacity at the time of purchase or those that reach full capacity after only a few cycles. Batteries with a 100+ cycle warm-up will always outlast those touting a high initial capacity.

A 5,000 WATT( 5 KW ) SOLAR SYSTEM INFORMATION AND PRICING2021-01-26T10:18:52+00:00


A 5000W solar power system is a size that should easily offset a typical home’s electricity usage. If it doesn’t, then you’ve got one serious energy guzzler of a home and should really consider an energy audit before going solar!
5 kW solar systems are also the minimum system size you should be considering if you’re looking to add batteries to your system in the future. Here’s what you need to know about 5kw solar system price and other information.

How many solar panels will you need?

To make up a 5kW solar system, you need 17 solar panels, assuming you use 300W panels – that will actually give you 5.1kW.
Each panel will be about 1.6m x 1m, so you’ll need at least 17.2m² of roof space.

How much electricity will a 5kW solar system generate?

A 5kW solar system will generate approximately 20kWh per day, depending on your location and a variety of other factors. The average home in Australia uses about 16kWh per day.
Note that this does not mean installing a 5kW solar power system will automatically give you a $0 electricity bill, as most households use the majority of their electricity at night when the sun isn’t shining – I talk about this in greater detail here.

How much money will a 5kW solar system save?

You may be thinking: “If the 5kW system offsets my energy usage, then surely it’s going to wipe out my electricity bill?”
Unfortunately it is not that simple! The amount the electricity companies will pay you for your solar energy (what’s known as a feed-in tariff) is, way lower than the price they charge you to buy the same electricity from the grid! Plus, there’s other costs on a bill such as supply charges, aka service charges. However, a 5kW solar power system is still an excellent investment.
Let’s say you get paid about 8c per kWh for exported energy (some retailers offer more) compared to 30c per kWh to buy electricity back from the mains grid. Here’s 3 scenarios to show how the 5kW system payback works:

  1. Use all the solar electricity by the 5kW systems in your home. This is unlikely unless you have a mini aluminium smelter in your back garden – or you operate a small business from your home.
    If that were your situation, you would save approximately $2100 in the first year, and around $67,000 over 20 years; taking electricity inflation of 5% into account. Those are some serious savings.
  2.  Export half the electricity: You would save about $1400 in the first year.
  3. Export all the electricity: You would save about $700 in the first year with a 5kW system.

How much does a 5kW solar power system cost?

The cost of a 5kW solar system will be around $10,000 before STCs, then you should get about $3,500 subsidy from STCs (aka the solar rebate), which takes a big chunk out of the up-front price. Taking into account the subsidy, expect to pay about $4,500 – $8,000 out of pocket costs for a good quality 5kW system, depending on the components selected and the installer’s approach to installation. Here is a basic price range cost in USA

5 KW SOLAR SYSTEM PRICE RANGE Average cost of 5kW solar system
Arizona $11,400 – $13,600
California $12,700 – $16,700
Colorado $14,250 – $16,950
Florida $11,600 – $15,300
Massachusetts $13,700 – $17,300
Maryland $12,950 – $16,750
New Jersey $12,100 – $15,800
New York $13,250 – $17,650
Texas $12,350 – $15,750
Washington $11,700 – $15,100


How long before a 5kW solar power system pays for itself?

If you are not exporting the energy and assuming you’ve paid a reasonable price for a 5kW solar system, then you should see a payback period of less than 5 years – so a fairly rapid payback timeframe. But you can actually be cash flow positive from day one if you get cheap solar finance. It is very easy to finance the purchase so that your monthly energy savings are worth more that the cost of paying back the loan.
It can be a laborious process to find a trustworthy solar installer to provide you with a good-quality 5kW solar power system at a reasonable price.


How is Powerwall Works

Tesla powerwall works



Powerwall gives you the ability to store energy for later use and works with or without solar to provide key security and financial benefits. Each Powerwall system includes at least one Powerwall and a Tesla Gateway, which provides energy monitoring, metering and management for the system. The Backup Gateway learns and adapts to your energy use over time, receives over-the-air updates just like the rest of Tesla’s products and is capable of managing up to ten Powerwalls.

With Solar
When the sun rises, solar begins powering the home. When additional power is required within the home, the home can pull from the utility grid.

Powerwall is charged by solar during the day, when solar panels are producing more electricity than the home is consuming. Powerwall then stores that energy until the home needs it, such as when solar is no longer producing at night, or when the utility grid is offline during a power outage.

The next day when the sun comes out, solar recharges Powerwall so you have a cycle of clean, renewable energy.

Without Solar
If your electricity rates vary throughout the day, Powerwall will charge when electricity costs are low and discharge when electricity costs are high, generating automatic savings. Powerwall will also provide seamless backup power by detecting grid outages and automatically becoming the home’s main power source.






4 Tips for 5Kw system Shoppers

1. Homeowners who get multiple quotes save 10% or more

As with any big ticket purchase, shopping for a solar panel installation takes a lot of research and consideration, including a thorough review of the companies in your area. A recent report by the U.S. Department of Energy’s National Renewable Energy Laboratory (NREL) recommended that consumers compare as many solar options as possible to avoid paying inflated prices offered by the large installers in the solar industry.

To find the smaller contractors that typically offer lower prices, you’ll need to use an installer network like EnergySage. You can receive free quotes from vetted installers local to you when you register your property on our Solar Marketplace – homeowners who get 3 or more quotes can expect to save $5,000 to $10,000 on their solar panel installation.

2. The biggest installers typically don’t offer the best price

The bigger isn’t always better mantra is one of the main reasons we strongly encourage homeowners to consider all of their solar options, not just the brands large enough to pay for the most advertising. A recent report by the U.S. government found that large installers are $2,000 to $5,000 more expensive than small solar companies. If you have offers from some of the big installers in solar, make sure you compare those bids with quotes from local installers to ensure you don’t overpay for solar.

3.  Use LFP battery acturly save the system cost.

People will normally think it is cost much higher to buying a Lithium iron battery storage system. While a Lead acid system cost much lower. But, ignor the cycle life for them. A qualified LFP battery system is rated 3000more life cycles at 80% DOD. while lead acid is 200 times game over. Then you will need to replace a new battery system. If you calculate based on each day expensive. You will find out. LFP battery system is much lower and more efficiency. OSM offer a standard 5000w battery system at 5Kwh a module. This allowd you upgrade for more capacity in future. Here is the product link: 5kwh OSM48100

5wh 51.2v 100Ah

Backside powerwall

Easy hang to the wall design.

4. Comparing all your equipment options is just as important

National-scale installers don’t just offer higher prices – they also tend to have fewer solar equipment options, which can have a significant impact on your system’s electricity production. By collecting a diverse array of solar bids, you can compare costs and savings based on the different equipment packages available to you.

There are multiple variables to consider when seeking out the best solar panels on the market. While certain panels will have higher efficiency ratings than others, investing in top-of-the-line solar equipment doesn’t always result in higher savings. The only way to find the “sweet spot” for your property is to evaluate quotes with varying equipment and financing offers.

For any homeowner in the early stage of shopping for solar that would just like a ballpark estimate for an installation, try our Solar Calculator that offers upfront cost and long-term savings estimates based on your location and roof type. For those looking to get quotes from local contractors today, check out our quote comparison platform.







The article and information from internet. If any of the content related to copyright infringement, please contact us by: info@osmbattery.com

What is Battery Energy storage system2020-11-05T10:26:10+00:00

Battery Energy Storage Systems and Their Role in Grid Integration

The question of what role grid-scale battery storage plays in a power system has gained prominence because of the increasing need for power system flexibility coupled with the rapid decline in the cost of storage technologies, particularly lithium-ion batteries. More utilities and governments seek to determine whether battery storage is a cost-effective option for integrating large shares of variable renewable energy, such as wind and solar, into their power systems.

While energy storage presents an enormous opportunity to improve power system operations, many power systems can support variable renewable energy integration using other methods such as system operation improvements or conventional generation flexibility. The appropriate amount of grid-scale battery storage depends on system-specific characteristics. A careful analysis is always required to understand whether investing in energy storage is the best option.




Battery energy storage systems (OSM BESS) are best suited for applications that require a fast response time and a high power demand over the short or medium term. They improve the reliability, availability and efficiency of the power supply. OSM BESS are ideal for applications like peak shaving, frequency control and load balancing, as well as renewable integration through ramp rate control and energy time shift. Energy storage systems generate much higher value when multiple, stacked services are provided in the same system.


What is an ESS System Means2020-11-05T10:17:44+00:00

What is battery energy storage system?

What is ESS means, Well, many people ask for this.  ESS is Energy storage system for short. and from Wikipage,as the capture of energy produced at one time for use at a later time. While there are a number of approaches to storing energy including mechanical (eg – flywheels), chemical (eg – hydrogen) and thermal (eg – ice systems), it is the electro-chemical approach using different types of batteries where the vast majority of industry activity is focused today.

ESS system

Early activity in stationary energy storage systems for the grid focused on only two components – the battery modules which store the electricity and the power conversion systems (PCSs) that convert the electricity from the direct current form stored in the battery to the alternating current form that is used on the electric grid.   But as the industry has moved from simply deploying pilot ESSs and demonstrating that they can charge and discharge to integrating these systems as standard parts of the production grid, it has become clear that control software is a vital third component. This control software serves as the “brains behind the battery,” providing remote visibility of the asset in grid control systems such as SCADA and enabling second by second optimization of the battery across a wide range of valuable roles that it can play for the utility owner managing the power system.

By |2020-11-06T07:17:55+00:00November 6th, 2020|OSM Energy News|0 Comments

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OSM ENERGY is a China Based Manufactuer. Provide Design and production of Lithium ion, lithium iron phosphate battery cells and Systems. The battery applications inlcude ESS( energy storage system, UPS, Passenger car, and other industry Embedded lithium type batteries. We provide Standard OSM brand Drop in replacement LiFePo4 series and also support OEM Custom Li-ion battery.

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