Simple hint for the installation of the Micro-Inverter
You can mount the solar panel right on the outside of your window. This will firstly protect from the direct sunshine in hot summer days (thus reducing the heat coming into your room). The solar panel and the Grid-free micro-inverter will generate up to 230 Watts of free energy that you can use in your house.
For example the self-generated enegry can be used to reduce your consumption from the grid and thus saving on payments for the energy needed to run the air-conditioning in summer.
Start using GridFree! http://www.ev-power.eu/GridFree-Inverters/
Terminal protectors for LiFePO4 cells
The terminal protectors cover the cells terminals (plus and minus) to prevent from accidental short circuit during manipulation with the LFP cells.
There are single cells in the 12V LP battery too!
Check this tip: sometimes it may be smarter to choose the 12V LP monolithic LiFePO4 batteries instead of individual 3.2V rated cells. The reason is simple – the 12V LP batteries contain a pack of four completely identical 3.2V cells integrated inside of the plastic case.
If individual cells are not on stock, purchasing the 12V LP batteries instead of separate cells is quite advantageous. When buying the 12V batteries your will not only get the finely balanced 4 cells, but there are stainless steel bolts and copper terminal connectors included with the battery as well. With the 12V LP batteries you get these for free!
As the photos show, it is quite easy and simple to open the 12V battery to get access to the individual cells.
Check our offer for Winston 12V 90Ah (http://www.ev-power.eu/_d1873.html), Winston 12V 60Ah (http://www.ev-power.eu/_d1872.html) and Winston 12V 40Ah (http://www.ev-power.eu/_d1871.html) models, that can be modified to access the single cells.
Home Solar Solutions
The photo shows the example of installing the household solar solution even at the blocks of apartment buildings. Here the solar collectors are combined with thermal solar installation.
The GridFree solution can be also installed in the same way to allow microgeneration of energy to reduce the consumption of the energy from the grid.
Safe Disposal of Damaged Batteries
Some times it happens that the LiFePO4 cells or batteries get damaged due to an improper use such as deep discharge or over charge. Such cells or batteries cannot be repaired and must be disposed of properly.
If necessary, to dispose of damaged batteries with LiFePO4 technology, we strongly recommend that you first discharge down to 0V [zero] and then link the terminals of the cell or battery with a simple wire jumper. This way you will prevent from the battery to regain some energy from the continuation of the chemical processes.
A Battery Care Function - Charging Level
Some notebooks have now the battery care function. This function saves the battery life and increases the life-span by not charging the battery to the full.
In a normal notebook use, if you stay on AC-power for long time, you may save the battery by low level charging. If you stay outside a lot, you may decide to change the charge to full 100% again.
The same idea may be used for the lithium battery applications as well. The same logic is applied for LiFePO4: the lower the charge/discharge cycle, the longer the life-span.
A simple solution to protect against short-circuit
We strongly recommend to have all instruments and tools fully insulated against accidental short-circuit.
The LP12V20AH battery with improved terminal connectors
For starting applications you can improve the performance of the LP12V20AH battery by using more robust copper terminals.
Small size solar panels - an easy transportation
One of the advantage of the small size solar panels is the easy transporation. As seen from the photo the 110Wp and 140Wp panels can be easily placed ina small-sized car like Citroen C-Zero. Mounting two panels in series you get the peak watt power as of the full sized panels (2x 110Wp = 220Wp, 2x 140Wp = 280Wp). Check our offer of the panels.
RT-BMS Coolers (Heat Sinks) for the CBU modules
We have enlarged the offer for RT-BMS system with high-quality heat sinks. These are designed to be used with the CBU units to allow proper cooling during the balancing. We offer 3 models (sizes and profiles A75M, ZH-7504, ZH-7505)
Check our offer of the Aluminium Coolers (Heat Sinks)
FAQ: How to connect the small cylindrical cells together?
Answer: First never try to solder the contact to these cells. You are sure to damage the cell by over heating. Any temperature above 70*C is damaging to the cells! Without professional soldering equipment it is not possible to make the connection.
We suggest using the round-cell battery holders. The holders for big „D“ size cells can fit some of the cell. The contacts for the holders for the lithium cells can be purchased form a local electronics shop (check the German Conrad as an example).
See the photos of some possible solutions.
GWL/Power Socket with swich 230V 16A
A simple solution to disconnect a 230V device from the AC power (off the grid). The built in light also gives an evident identification if the socket is on the power or not. Check the GWL/Power Socket with swich 230V 16A .
A safety hint: We always recommend a complete hardware disconnetion of any equipment from the power sources when the equipment will be left unsupervised.
Another cell strapping photo! Enjoy.
FAQ: What is the capacity of a SuperCap?
The calculation is showed in the picture. For a 6000 F capacitor working with 2.5V nominal voltage, the total energy is 5.2 Wh. Divided by the discharge voltage of 2V, the capacity is 2.6 Ah.
The Result: 6000 Farad SuperCap at 2.5V has about 2.6 Ah capacity. To make a 12V 40Ah SuperCap “battery” you need 112 pieces of 6000 F super capacitors (16P7S configuration). (Source)
Simple Battery Management Board (SBM)
The easiest way to protect a lithium battery pack. The SBM board manages a pack of cells and disconnects the load under any unfavourable circumstances: cell over voltage, cell undervoltage.
SBM16/60 - the management board for 16 LFP cells (48V) with power up to 60A. (photo) Check the PDF with technical specifications for SBM16/60. For higher loads you need to use a DC contactor to be managed by the SBM board. This drawing shows the DC contactor installation.