Project Description

12v 1000ah lithium ion marine solar power system battery

Coremax provide custom design for large 12v lithium ion battery, 12v 1000ah lithium ion battery system for Marine and 12v solar power system. This system Apply with LiFePo4 battery technology and Smart BMS system. The Battery system design with 4pcs 3.5U 12.8v 250Ah LiFePo4 battery modular. 4pcs connecting in parallal for form a 12v 1000Ah battery system. Total energy 12 Kwh. This system is suitable for solar energy storage systems 12 volt. And also suitable for Marine or RV back up power system.

server rack

12v 1000ah lithium ion battery

  • Nominal voltage: 12v
  • Nominal capacity: 1000Ah whole system
  • Discharge Capability: 1000A
  • Battery Pack dimensions: 628*672*56MM
  • Energy: 12 kWh 12.8kWh
  • Approved certifications: UL, MSDS, UN38.3, CE

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Basic Information

The large capacity 12v battery apply with high-quality 4s lifepo4 battery prismatic cells, the battery system come with built in BMS and relay protections. Total energy 12kWh. Each battery module weight 30KG. Total system weight 120Kg.

The 12v lithium ion battery structure.

The Large 12v 1000ah lithium ion battery system build by 4s lifepo4 prismatic battery cells. Each unit cell capacity is 50Ah.  Total 1000Ah based on 12.8 volt on system. It can effectively charge and discharge the battery pack by PV or ongrid AC by invertor . Heavy duty load lithium battery 12v BMS prevent any battery overcharge, over discharge caused by damage, And can control the battery charge, discharge current, Ensure that the battery pack and applications are not damaged; To ensure that in the event of a short circuit failure when the output off and automatic balance of the application of the battery pack at any time in the best condition. The large capacity 12v lifepo4 battery also come with solid metal casing. Provide strong protection from any physical damage.

Safety and economical

12v 1000ah lithium ion battery pack system does not explode or catch fire like lithium cobalt (found in cell phones and laptops etc). It does not have toxic chemicals and offers four times the power density at a third of the volume compared to lead acid. For these reasons it’s safe for household use.

Excellent discharge characteristics

large 12v 1000 amp hours lithium ion battery With low internal resistance and high, flat voltage characteristics during strong current discharge, which ensures a wider application field. Like 12v solar power system, Lithium RV battery packs, 12v lithium ion marine battery or any other backup power systems.

Long cycle life

large capacity 12v battery Provide long storage life with few limiting conditions. It offers problem-free charge after long storage, permitting to use in a wide range of applications.

cycle performance test

Safty Test:

  • Over-charge test
  • Over-discharge test
  • Short-circuit test
  • High-temperature test
  • Fire test
  • Squezzing test
  • Pin-Prick test
  • Fall down test
  • Water immersion test
  • Shooting test


  • OEM orders are available and looking for long term distributors/dealers.
  • Coremax 12v 1000ah lithium ion battery provide Superior quality and cost-performance ratio
  • If the battery system takes high drain discharge current( over 300amps). We suggest 48v battery system. With 16S nominal voltage 51.2volt. This is most regular system for home energy storage. And easy to compitable with any invertors.

No. Item Spec.
1 BMS working current DC 12V
2 BMS working Volt range 9V~14.6V
3 BMS working consumption 10W
4 BMS Sleeping consumption Less then 10mA
5 Cell voltage monitor range / accuracy / frequency 0.3V~5V/0.5%/100ms
6 Total voltage monitor range/ accuracy / frequency 1000V/1%/100ms
7 electric current transducer FS700ET
8 Current monitor range/ accuracy / frequency -300A~300A、0.5%FS、100ms
9 Temp. monitor range/ accuracy / frequency -25℃~85℃、±2℃、100ms
10 Temp sensor quantity NO.1 6; NO.2 6; No.3 6; NO.4 6
11 Battery balance /current 130mA
12 SOC estimate accuracy ±5%
13 control relay 7 pcs
14 CAN
15 RS485 2  RS485( touch screen 1,spare 1)
16 terminal resistance
17 Standard QC/T897-2011

Specifications of  Protection

NO.1 Item spec time handling
1 Over voltage 1 3.55V 3S warning
2 Over voltage 2 3.65V 3S Cut-off contactor
3 Under voltage 1 2.75V 3S warning
4 Under voltage 2 2.5V 3S Cut-off contactor
5 Differential Volt 1 300mV 10S warning
6 Differential Volt 2 400mV 10S Alarm
7 Discharge high temperature 1 55℃ 5S warning
8 Discharge high temperature 2 60℃ 5S Cut-off contactor
9 Discharge low temperature 1 -5℃ 5S warning
10 Discharge low temperature 2 -20℃ 5S Cut-off contactor
11 Charging high temperature 1 55℃ 5S warning
12 Charging high temperature 2 60℃ 5S Cut-off contactor
13 Charging low temperature 1 5℃ 5S warning
14 Charging low temperature 2 0℃ 5S Cut-off contactor
15 heat difference 1 15℃ 5S warning
16 heat difference 2 20℃ 5S Alarm
17 SOC 1 15% / warning
18 SOC 2 10% / warning
19 Discharge Over current 1 250A 5S warning
20 Discharge Over current 2 300A 5S Cut-off contactor
21 Charging Over current 1 -350A 5S warning
22 Charging Over current 2 -600A 5S Cut-off contactor
19 inch battery

1000ah battery bank installation

19" Rack-Mount Li-Ion Battery

12 volt 1000ah BMS controller box setup

48v 100ah battery

1000ah battery battery modular and BMU


If you are looking for this 12v 1000Ah Lithium ion battery for solar energy storage. We will strongly recommed our residential battery system based on 48v. There are 100Ah, 200Ah available from Coremax. These are designed for low voltage 48v solar energy storage system.