Copper terminals for LFP020AH cells

Check here the LFP020-CON item on our web.

Small capacity LiFePo4 cells - new models from 3AH to 20AH

We have increased the offer of various models of the small capacity cylindrical LiFePO4 cells. These cells are ideal for low energy equipment.

We now carry the 3AH, 5AH, 8AH, 10AH, 15AH and 20AH models.

Check our web page http://www.ev-power.eu/LiFePO4-small-cells/

DC Power connectors - Anderson Type 50A and 120A

Check our new offer of the DC power connectors. We offer the popular “Anderson” type 50A and 120A connectors with several different voltage marking:

• Yellow - 12V DC
• Red - 24V DC
• Blue - 48V DC
• White - high voltage up to 144V DC

Lithium Battery 12V/180Ah (LFMP12V180AH)

A large capacity 12V battery consisting of 4 cells. A simple solution for a variety of the 12V applications. Ideal for an energy supply in off-grid installations, boats, caravans, etc. It is a completely preinstalled battery.

The initial charge: The battery must be charged to full and each cell needs to be balanced before using.

Download the specification file: GWL-LFMP12V180Ah.pdf

This is a special time-limited offer.

The specification for the 12V LP models of the LiFePO4 batteries

Check the updated version of the specification for the 12V block models of the LP batteries.  Download the PDF file here.

RT-BMS Master unit for 192 cells

The photo shows the RT-BMS Mater unit for up to 192 cells. This version of the main unit has all connectors available and supports the CAN bus as well. 

Be sure to check the RT-BMS specification to understand the key functions of the system.

High Power CBU modules - detailed photos

The installation of the high-power CBU modules is indentical with the standard CBU modules. They can be replaced directly if high balancing power is needed.

Each RT-BMS data-line must be terminated with the CBUX module (terminal). If needed to have the data-line detachable, it is posible to use the dual connector module.

Check the RT-BMS Support documents:
http://www.ev-power.eu/docs/GWL-Power-RT-BMS-Info-A.pdf
http://www.ev-power.eu/docs/GWL-Power-RT-BMS-Info-B.pdf
http://www.ev-power.eu/docs/GWL-Power-RT-BMS-Info-C.pdf
http://www.ev-power.eu/docs/GWL-Power-RT-BMS-parametersEN-D.pdf

GWL Power blog pages:
http://gwl-power.tumblr.com/tagged/RTBMS
http://gwl-power.tumblr.com/tagged/RTBMS/page/2   (and more pages)

RT-BMS Cell Ballancing Units with DUAL POWER - up to 10A

We are now offering the RT-BMS Cell Ballancing Units (CBUs) with dual power MOFSET transistors that allow the ballancing current up to 10A. The sucess of the balancing function is dependent on proper cooling of the high-power transistors. These must be mounted onto a sufficiant cooler.

Check the RT-BMS offer at EV-POWER.EU

Note: it is not possible to combine the standard CBUs with the high-power CBUs in one set. Your installation can have either standard or the high-power models.

GWL distributing the CALB LiFePO4 cells

Check our offer of the China Aviaition Lithium Battery (CALB) models: 40AH, 60AH, 70AH, 100AH, 130AH, 180AH, 400AH

The GridFree Tracer specifications and manuals

• GWL/Power MPPT Solar Regulator 12/24 V, Tracer 20A
  Manual  GWL-REG1224-20ME-Tracer-20A-Manual.pdf
  for 12V:   12V x 20A = max 240 Wp of the solar panels
  for 24V:   24V x 20A = max 480 Wp of the solar panels
    
• GWL/Power MPPT Solar Regulator 12/24 V, Tracer 45A
  Manual GWL-REG1224-45ME-Tracer-45A-Manual.pdf
  for 12V:   12V x 45A = max 540 Wp of the solar panels
  for 24V:   24V x 45A = max 1080 Wp of the solar panels

Charging LiFePO4 battery using the GridFree Tracer solar chargers

The charging diagrams show the charging of the LFP batteries using the Tracer solar chargers.  It is evident that the charging voltage does not increase over the 14.9V level and the batteries are charged to full.

Check the Tracer Series on-line at http://www.ev-power.eu/Solar-GridFree/

GWL/Power Solar Charge MPPT Regulators - GridFree Tracers Series

GWL/Power Tracer series solar charge controller adopts MPPT technology (Maximum Power Point Tracking). The advanced tracking algorithm make the solar module operate at ideal voltage which the solar modules can produce the maximum available power. Compared to conventional PWM controller, MPPT technology increase charge efficiency up to 30% and decrease the power of solar array needed.

GridFree Tracer has the ability to step-down the higher voltage solar array to recharge a lower voltage battery bank. So it allows on grid solar modules or thin film modules to charge the off-grid battery. And the cable size can be reduced because of the small current from the solar array.

The solar chargers have been tested to prove the support for the LiFePO4 technology.

Key features:

• MPPT technology
• Peak conversion efficiency of 97 %
• High Tracking efficiency of 99%
• Several seconds tracking speed
• Very fast Sweeping of the entire I-V curve
• 4- Stage charge with PWM output
• Excellent thermal design and nature air cooling
• Full power output in ambient temperatures up to 45℃
• Temperature compensation function
• Sealed, Gel, Flooded battery type optional, LiFePo4 supported
• Diversified load control: Manual, Dusk to Dawn, Dual timer, TEST mode
• Serial interface with optional remote meter
• CE certificate

Check the offer of the Tracer Series on-line

Lithium Battery Transportation Warning Label

All lithium batteries contain electricity and they can release the electric potential in case of an accident during the transportation. For this reason the shipments with LiFePO4 batteries must be marked properly to give warning about the possible danger in case of an accident.

Winston Battery at the EVS26

The Winston Battery products were displayed at an exhibition booth at the EVS26 event.

How does the CBM work if the charging current is higher than the balancing current?

The balancing current of the CBU module is about 1.7A. If the charging current is higher than the balancing current, the voltage will continue to increase gradually.  If the charging current is lower than the balancing current, the voltage will decrease slowly.

The diagram shows that the balancing of the CBU starts at 3.67V and the voltage is reduced to 3.64V and does not keep increasing as fast as without the balancing. However the charging current is 2A while the balancing current is 1.7A so the voltage starts increasing slowly again. This is a proper way the CBM operate when the balancing the cells.