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 GridFree Tracer specifications and manuals
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:
Check the offer of the Tracer Series on-line
Installing battery packs
Photos of examples of two battery packs: 48V/20Ah consisting of 16 3.2V cells in 16S configuration. The other pack is 24V/400Ah, consiting of 16 cells in 2P8S configuration. This pack has CBM boards installed to allow for ballancing of the cells during the final part of the charging stage.
Using LiFePo4 for off-grid solar application with CellLog8 monitoring
Check the “Solar Power - A Bodger’s Guide” blog to see the application of the LFP cells for solar applications.
PV panels for every roof!
The small PV installations and off-grid solutions are getting more and more popular. The LFP batteries are proving as long-term energy power backup solutions. We are getting ready to launch some new and exciting products. Wait for more to come!
Check the link to some ideas here.
High Current Charging and Discharging Report for Lithium (LiFeYPO4) Cells
How will a LiFeYPO4 cell behave after 13000 cycles of high speed charge and discharge? Will the battery overheat or have any other malfunction? Will the battery age and lose its capacity?
Study the results in the The LiFeYPO4 cell test data after 13,000 cycles
Solar charging test data - October 2011
We are using two 217Wp panels to charge a 48V pack of 3x 12V90AH batteries. Download the results of the total energy collected - XLS file. Check the detailed results of the LOG files. The data are recorded using the PowerLog 6S device and processed by the http://www.logview.info/ software. You can download the complete data logs here - ZIP file.
Harvesting the power of the sun
We have set up a new configuration to test the solar charging of LFP batteries. Two solar panels (217Wp each) are in a serial string to charge a 48V/90Ah battery pack made of 4 pcs of LP12V 90AH batteries.
During a sunny day in October, we are able to gain more than 2 kWh of energy from the 2 panels. (38Ah at 53V = 2kWh)
Our tests have a multiple purpose: to test the solar charging, to examine different solar controllers, to study the charging of the LFP batteries and finally to make a working solution to disconnect from the grid for ever.
If you are interested in these solutions, keep checking our blog or contact us directly.
Using solar chargers to harvest solar power
We are testing different solar chargers to see their performance with the LFP battery packs. Here is the summary of our tests:
Figure 1 - shows the initial charging of a completely empty 48V/20AH LFP battery pack. We were able to charge 25Ah of power. We are using two 217Wp solar panels in series. They provide the peak of 350W.
Figure 2 - shows the discharge of the 48V/20AH LFP battery pack until the low voltage level of 44.4V is reached. The discharge with is a resistive load, so the current changes at the beginning and decreases as the heat spiral warms up.
Figure 3 - shows the charging mixed with periods of discharging.
Figure 4 - shows a complete discharge and charge cycle
Figure 5 – shows the detail of the charging cycle
The data are recorded using the PowerLog 6S device and processed by the http://www.logview.info/ software. You can download the data logs here VS1, VS2, VS3, VS4.
Simple solar solution for off-grid applications
This is our demonstration panel for simple solar solutions based on the 12V LP batteries. Check with us if you need such solutions.
Testing Solar-charge controllers with LP batteries
Sample 1: STECA SOLARIX MPPT 2010
This is a Maximum Power Point Tracking (MPPT) solar charge controller. It works perfectly. It gets the maximal power from the solar panel. The ideal peak reached was 200W of power input from 217Wp solar panel. The average solar input was 130W to 150W (from 217Wp panel during a sunny day in Prague, Czech).
Sample 2: PHOCOS CIS20
This is a Pulse-width modulation (PWM) solar charge controller. This controller will limit solar panel output voltage according to the battery voltage. It is not suitable to be used with the high voltage FV panels (e.g. our 217Wp panel with max 36V). It is designed to be used with the so called “12V” solar panels.
The ideal peak reached was 140W of power input from 217Wp solar panel. The average solar input was 80W to 90W (from 217Wp panel during a sunny day in Prague, Czech).
You can download the test data results from the links bellow:
http://www.auto88.cz/_info/Tests/STECA-SOLARIX-MPPT-2010-1.pdf
http://www.auto88.cz/_info/Tests/STECA-SOLARIX-MPPT-2010-2.pdf
http://www.auto88.cz/_info/Tests/STECA-SOLARIX-MPPT-2010-3.pdf
http://www.auto88.cz/_info/Tests/PHOCOS-CIS20-1.pdf
http://www.auto88.cz/_info/Tests/PHOCOS-CIS20-2.pdf
http://www.auto88.cz/_info/Tests/PHOCOS-CIS20-3.pdf
Concerning the LFP batteries
The usage of the 12V LP (or LFP) batteries is completely trouble-free. Both regulators do not exceed 14V on the battery charge voltage output, so the 12V LP battery will never be overcharged.
Be sure to contact us for more details on the use of the LP batteries with the solar controllers.
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