48v 200ah lifepo4 battery

 This 48v (51.2V) 10KWh 200Ah LiFePO4 lithium battery solar energy storage system designed for house owner residential usage. 10kwh energy is normally big enough capacity for a small house solar energy storage. With Coremax 51.2v 200Ah 10kwh, you don’t have to parallal small 5kwh powerwall anymore.

Coremax 51.2v 200Ah designed by experienced engineers come directly from BYD. With rich experience and advanced techniques, it features stable and fashionable design, high energy, high power density, long service life, and easy installation and expansion, all of which reflect the real requirements of the end users and the strongest technical capability. Thanks to BYD prismatic large capacity cells and also BYD battery pack designer.

Lithium iron phosphate batteries is a kind of environmentally friendly backup power system. We use LiFePo4 rather than NCM to avoid safety concerns by lowering the possibility of thermal runaway because of improper disposal and save the production cost as well. Compared with other products in the market now, LiFePo4 experiences a lower rate of capacity loss. With state-of-the-art power conversion and energy storage technologies, our 10kwh wall mount Energy Storage System (ESS) offers high-efficiency power conditioning capabilities for demand management, power dispatch, renewable energy smoothing, etc. Coremax 10kwh LiFePo4 powerwall can provide comprehensive energy storage for residential, commercial and utility applications. Our solar energy storage system is now cover racked installation, wall mounted installation. and more will coming soon.

• Manufactured based on High quality BYD/CATL cells prismatic LiFePo4 cells inside.
• Build in with large capacity prismatic cells, high power, and excellent charge and discharge performance.
• Strictly controls the raw materials selection and the whole production process to ensure that the ESS has stable performance and excellent quality.
• Tested by relevant national departments in the aspects of quality and performance indicators.
• Ensured to be a high-quality battery with excellent performance.
• High integration with less installation space.
• Long life cycle, >5000 times at 80% DOD.
• Free of heavy metals and environment friendly.
• Maintenance free, no memory effect.
• Internal BMS with full protection, high voltage protection with higher reliability.
• Clean and safety internal design by BYD oringinal designer.

Specifications:

• Battery Pack Power: 10,240Wh (10 Kwh)
• Battery Pack Capacity: 200Ah
• Battery Pack Voltage: 51.2VDC
• Battery Pack Charge Voltage: 58.4VDC
• Battery Pack Discharge Lower-Voltage: 46VDC
• Battery Pack Max Discharge Current: 100A
• Battery System Charge Current (Standard): 100A
• Battery Pack Charge Current (Normal): 100A
• Battery Pack Max Charge Current: 50A
• Battery System Discharge Current (Standard): 100A
• Battery Pack Discharge Current (Normal): 50A
• Operation Cycle Life: Over 5000 times
• Protection Class: IP54
• Cell Technology Lifepo4 Efficiency: 98%
• Depth of Discharge: 100%
• Communication Option of CANBUS OR RS485, SMbus
• Battery Pack Cell Quantity in Series (pcs): 16S (Hybrid)
• Operation Life: 20+ years
• Dimension: (769 * 580 * 235mm)
• Weight: 226 Lbs. (108 Kg)
• Operation Temperature: 32~122F (0~50C)
• Storage Temperature: -4~140F (-20~60C)
• Products Certificates: TÜV (IEC62619), CE
• Transfer Certificates: UN38.3, MSDS

Application

Energy Storage

• Solar-Wind Power System / City Grid (On/Off) / Community and Family
• Back-up System and UPS
• Telcom Base / CATV system / Computer Server Center / Medical Instrument / Military Equipment

Other Applications

• Security and Electronics / Mobile POS, Mining Light / Torch / LED Light / Emergency Light
• RV Motorhome /Golf Carts Battery / Boat Marine Yachts / Electric Skateboard
• LED Backup / Engine Starting Battery, etc.

 

18650 battery which side is positive and negative

What is an 18650 battery?

An 18650 battery is normally a lithium ion or lifepo4 battery. The height is 650mm. and diameter is 18mm. As we can see from the dimensions. The 18650 battery is named from its size. So, if any cell rated this size, we can call it 18650 cells.   

All battery cells with positive and negative pole.

Same for 18650 battery cells. but we should have different way to find out the positive and negative pole of it. This is very important to know before you insert the battery to the device. Wrong setting would lead a fire or other problem if there is no protection circuit.

Check by sight.

We can find out the positive and negative by just see it. The flat side is negative most of the time. and top bottom side is positive. This a normal design as most of the battery cell like this.

However, this is not 100% for sure. Because sometimes both sides are flat. And some batteries positive and negative just in one side like following photo shows.

Check by meter.

We strongly recommend to check the 18650-cell pole by a volt meter. This will be 100% safety before you place the battery to any devices.

Consideration about Residential lithium battery storage 5kwh or 10kwh

 Residential lithium battery storage 5kwh or 10kwh

 

 

There are many regions in this word still lacks of electricity. While we don’t have insufficient on grid electrics, most of the house owner will select a solar energy system for the residential. A solar energy system is normally included PV panels, invertor, meters and also battery storage system. The battery storage system is obviously so important for on grid /off grid residential energy system. What is the voltage should we use? and how many powers we use set up for our house? Many people are getting confused from internet information. Here let's make it easy understanding and make a best comigration for our personal residential battery storage system.

 

Select the right voltage.

As we all know, in the market, there are many different voltages for solar battery storage systems. especially for home. But generally, we can find out it to low voltage and high voltage battery storage. Here we can list the most popular and its unique parts.

 

1.12v battery storage system.

12v is most common voltage seeing from our Daly life. 12 volts is also a start voltage for home storage batteries. This will include 12v lead acid batteries and 12.8v lifepo4 batteries. 12v battery can easy to find in the market. the price is also very low compared with other voltage. As this voltage is very low, it will be the best choice for small power systems. For example, it can power your lighting system. Fan, TV. Our suggestion is not over 2000W. In this way, keep the battery discharge current as much lower as possible. People will say, what if I want a 5000W consumption for my house? Well, you should consider to use a higher than 12 v voltage system.

 

2. 48-volt battery system.

As we all know. watt=Voltage*current. So, if the watt becomes higher. the voltage is not changing, then the current will be higher as well. Higher current will require much bigger wire for connections and if the wire not big enough, it will generate heat. This will waste a lot energy each day during we use the battery system. at the same time, it increases the risk of fire. It is easy to resolve this problem by increase the system voltage. and 48v or 51.2v are the best solution for residential small solar systems.

 

Basic calculation for example:

A. if we have a total 5000Watt applications (TV, fan, water heater, air-conditions). When we power on all of them. If we use a 12v system. 5000/12 volt=416.6A. This is absolutely too high as you can see.

B. While if we use a 48v system: 5000W/48 volt=104A. And this a very normal current. a small cable will handle this current.

 

Of cause, above information is based on off grid solar battery energy storage system. When people set up an on-grid system will be different. Because the battery system will have a limit on discharge power. If the power is exceeded, the on-grid power will mix up and support as well. And we don't need worry about that. The hybrid invertor will manage all of them automatically.

 

 

Most popular energy storage.

There are some major brands like Tesla Powerwall, LG and others. A majority style we can have two type.

 

1. Ground mounted battery system.

A ground mounted battery system is normally formed by different battery modular. Like 2.5kwh a module or 5kwh a modular. There are many different styles, basically we have 19-inch battery rack system. 2.5U, 3U, 3.5U and 4U. Some you may find 5U batteries. These batteries modular will built in a BMS. and all of them connected in parallel to increase the system energy or capacity.

 

2. Wall mounted system.

Many years ago, people select 12v lead acid batteries. As time goes by, lithium-ion batteries are developed. and there is a chemical name Lithium iron phosphate battery. The rated nominal voltage is 12.8 volt. This kind of batteries is under bulk production for EV industry from China manufactures. And thanks to that. Solar energy storage systems user is benefit from this now. Because of the widely application and bulk production. The price for lithium iron phosphate batteries is much more affordable. Some supplier offers 12.8v LiFePo4 batteries at equal cost with lead acid or AGM one.

 

5kwh or 10Kwh

People sometimes get confused, how much power do I need exactly. 5kwh is enough? Or I should buy 10kwh battery storage? Well, this will always be related to type of solar energy storage system you install.

On grid or off grid.

As we know, off grid system will require discharge power from storage battery packs only. The discharge capability will be limited. If your total load is 8000W. obviously 5kwh battery is not enough.

While we use on grid system. The battery system could supply 5000W power, while on grid electricity will support 3000w. In this way. The system is works properly even it is 5000wh storage.

 

Load of applications.

We always suggest use the battery in a healthy way, it will maximum the battery storage system\s service life. 0.5C is the best discharge rate. Of cause if you use it as 0.3C or 0.2C, it will extend the cycle life obviously.

 

The first thing we need considered is make sure the battery system can power on all of your applications. Then calculate your daily consume power. And the capacity of the battery should possibly cover a 24 hours discharge.

 

Generally, based on our actual life. 5 kWh battery system is suitable for small family like 1-2 person. While you have 3-5 person at home, you need to consider use a larger system like 10 kWh or 15 kWh or even higher.

 

Select the invertor.

 

Invertor is important part in a solar residential battery power system. Besides the batteries. I think invertor is the most important part. It manage the battery system, grid AC power, meters, Solar PV Array. From some point of view. A invertor is the master for the system.

 

Consider high quality brand Invertors.

 

Make sure your lithium-ion battery storage system is compatible with your invertor. There are many suppliers from China nowadays provide different type residential battery system. Especially for small 5kwh or 10kwh type wall-mount and rack mount system. A majority of them is not support the communication function, or even they provide communication port, but not able to correctly communicate with your invertor. So, before you make purchase, check out this with supplier in China. Provide the brand name, model No. what type of the communication port and protocols. In this way, it avoids the misunderstanding and waste your purchase investment. Normally there are RS232, RS485 or CAN2.0 available.

 

Coremax() Residential Battery storage system Supported Invertor List:

BYD, : BYD is a China based supplier offer high quality LiFePo4 batteries. The BYD Bbox is very famous. At the same time. BYD also produce invertors.

Goodwe, A Solar energy invertor producer based in China.

Deye. A supplier provides high quality and low price on grid and off grid solar invertors

Fronius,

SolarEdge,

SMA Sunny Boy，

Sungrow,

Huawei，

FIMER，

solax,

delta,

enphase,

pylon tech: A China supplier provide storage battery system 48v and HV battery storage also inverters.

luxpower: A China supplier for battery storage system invertor

 

 

NO.97 Maoyuan Indistry zone, ChuangPing Dongguang city Guangdong Province China.

 

Coremax Technology company limited

info@cmxbattery.com

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