Lithium battery

    Pylontech Lithium Batteries

    The Pylontech US2000 24V 48V Lithium Battery is an advanced Lithium-Ion Phosphate accumulator that allows us to have a Lithium technology accumulator at a very competitive price and with very attractive technical characteristics. These isolated lithium batteries offer the advantage of maintaining their discharge for up to 6.000 cycles compared to conventional Opzs or similar batteries. Lithium batteries, unlike conventional batteries, maintain their charge at 100%. Up to 40 units can be installed in parallel using a hub to offer greater energy accumulation.

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    Information Pylontech lithium batteries

    Pylontech Lithium Batteries

    The ideal solution for energy self-sufficiency with Pylontech lithium batteries. Discover the expandable lithium battery system for isolated or self-consumption photovoltaic installations, both residential and business.

    Pylontech offers you a range of modular lithium batteries in 19-inch rack format with a nominal voltage of 48V, available in 2 and 3,5 kWh storage. Designed to work more than 6.000 cycles with a discharge depth of 80% DoD.

    Pylontech LiFePo4 lithium batteries are compatible with the main power inverters in the renewable energy sector such as Victron Energy, Voltronic, Studer, Growatt, Sungrow, Imeon...

    Pylontech Lithium batteries can be installed in parallel, in the same rack, with up to a maximum of 8 units in the case of the US 2000B model or 12 units in the case of the US 3000 model and, in turn, with the use of the Pylontech Hub LV-Hub, up to 5 racks can be connected in parallel, achieving lithium storage systems from 2,4 kWh to 210 kWh, giving this battery a wide range of use possibilities. Enjoy Pylontech LiFePo4 Lithium batteries with the guarantee of a great brand.

    Pylontech, The Force Awakens

    Pylontech lithium batteries have a series of advantages over other batteries such as:

    Battery Management Systems – BMS

    Each battery has a BMS monitoring system responsible for controlling its charge, discharge and temperature, avoiding damage to the battery when it exceeds its safety parameters and adding an energy compensation system between


    The useful life of pylontech batteries is estimated by their manufacturer at 6000 cycles at a charge depth of 90%.
    DoD, although we must show a certain caution when giving these figures, taking into account the youth of this storage technology in our market and the enormous differences in the conditions of use, mainly weather conditions that can occur in our geography. .

    Reduced Weight

    Compared to other types of technologies such as lead acid batteries, the lithium battery is much lighter. In this case, each Pylontech module has a weight between 24 and 32 kg, depending on the model.

    Loading/Unloading Capacity

    The recommended charge/discharge capacity of these batteries is 0,5 C (25 or 37 Amp depending on the model), allowing a capacity of 1 C (50 or 37 Amp depending on the model), and a charge/discharge capacity maximum of 100 Amp, for a maximum of 15 seconds.


    As indicated, its 19″ Rack format allows multiple configurations, for this, the Pylontech Lithium battery can be mounted in any Rack, or with the Pylontech brackets.

    Unlimited Energy with Pylontech

    Pylontech Lithium Solar batteries are essential elements in our photovoltaic kits at Merkasol, being able to supply the consumption of a habitual residence or company, in frequent or permanent use with monitoring of consumption outside of production hours.

    Thanks to the Pylontech Lithium batteries and together with a powerful inverter, we can have total self-sufficiency in an isolated installation or also with connection to the electrical grid only as a backup.

    If we add enough panels we will ensure solar production in line with regular electrical consumption. We can increase panels up to 15 units and batteries up to double the capacity. All of this can be complemented with electrical accessories to be able to make the different connections between the equipment and the Pylontech batteries.

    Lithium Batteries

    Since the discovery of electrical energy, one of the great problems of humanity is its storage. The energy distribution, transportation and consumption system works in real time, instantly generating the energy demand existing in the network at all times.

    Renewable energies (solar, hydraulic, wind, etc.) have made technical progress in this and other aspects until today, due to the increasing need for a change in the energy system, new technologies are being explored for the storage of the electric energy. From waterfalls in hydraulic power plants, to storage systems for industry and homes such as hydrogen accumulators (H2) or lithium-ion batteries (Li-Ion) and more specifically lithium-ferrophosphate batteries (LiFePO4). ).

    Lithium ion batteries, also called “Li-Ion” or “Lithium” batteries simply, use lithium salts as an electrolyte to achieve the release of electrons through chemical reactions that release and store electrical energy. The deterioration caused by heat and its sensitivity to extreme temperatures carry the risk of explosion or combustion of the lithium battery, which is why sophisticated and expensive protection and safety systems must be included.

    It is increasingly common to see Li-Ion and LiPo (lithium polymer) batteries in computers, tablets, smartphones, RC cars and all types of current portable electronic devices. With the integration of lithium batteries in the photovoltaic solar sector, both in the industrial and domestic spheres, a before and after is expected in the way we understand the use of energy in our homes.

    The main brands that work in the production of lithium batteries for solar installations are: BYD and Pylontech.

    Lithium batteries are very popular in many sectors and both lithium batteries with low intensity and lithium batteries with the most demanding technical characteristics on the market are available on the market.

    ​At WccSolar we put at your disposal the most cutting-edge lithium batteries on the market prepared for both the most demanding photovoltaic installations and for sectors that want a powerful, fast, efficient accumulator, with a long useful life and a long warranty period. cover its correct operation.​

    Characteristics and peculiarities of lithium batteries

    Lithium batteries are among the batteries with the longest useful life on the market, extremely low self-discharge, an extraordinary depth of discharge and no memory effect, so lithium batteries can discharge at 100% or store them at half charge without the lithium battery suffer. The lithium battery is made with very light elements that allow lightweight Li-Ion accumulators to be composed, in various shapes and with a much higher performance than conventional batteries. With an energy density up to 3 times greater than traditional batteries and capable of supporting larger charge/discharge current rates.

    One of the notable qualities of lithium batteries is their high voltage, some models working in variable ranges from 300V to 450V approx. thus achieving a reduction in the current that circulates, avoiding heating and losses in the wiring, among many others.

    The BMS in the lithium battery

    We can consider BMS technology as a safety element that prevents accidents in the use of batteries, and you only need to do a little research on YouTube to see a lot of videos of what happens when a lithium battery is mistreated: smoke, sparks. and even explosions. Batteries must be charged safely to avoid accidents.​

    More and more people are interested in lithium batteries and their applications, and since it is such a new product, there is a great lack of knowledge among the public with everything related to its characteristics, care and uses, and at the same time there are more people interested in knowing how they work and the ability to make renovations, or even expansions.

    It is worth highlighting 3 components in any installation with lithium batteries:

    – Lithium battery housing or cabinet: to store our battery bank (depends on the brand).

    – Lithium-ion cells: depending on the manufacturer, they may have different shapes.

    – BMS: Battery Management System, as its name in English indicates, it is an electronic device that is absolutely necessary for the correct charging and discharging of lithium batteries.

    It is not necessary to change the BMS when the lithium battery is renewed, although if our battery has lost autonomy but continues to work, in principle the BMS is healthy and we do not need to replace it; Just changing the lithium cell pack would be enough. Now, if the battery has suddenly stopped working, it may be that the cells are completely exhausted and are no longer receiving charges, or there is a problem with the BMS; If the battery is less than 2 years old and has stopped working suddenly, it may be due to a BMS failure. In view of this, and if we take into account that the useful life of the BMS is not parallel to the life of the batteries, there are more and more users who prefer to change the BMS battery at the time they replace the lithium ion batteries because with This saves additional labor costs in addition to being covered by its warranty.

    Points to take into account about lithium batteries

    Unlike other battery technology, lithium or LFP batteries require a BMS (Battery Management System).

    What happens to a lithium battery if a BMS is not used? The lithium battery cell would fail if the voltage on it increases above 4,2V or if the voltage on it drops below 2,5V .

    The cells of a lithium or LFP battery do not self-balance at the end of the charging cycle, since the cells of this type of battery are not completely equal, so, at the end of the cycle, some cells are fully charged or discharged, and others don't. The differences will increase if lithium battery cells are not routinely equalized or balanced.​

    In the case of other types of batteries, even if the cells are fully charged, a small amount of current continues to flow immediately afterwards to help charge the rest of the cells.​

    However, the current that passes through the cell of a lithium or LFP battery when it is fully charged is almost zero, so over time, the cells become unbalanced since all of them are not charged/discharged at the same rate. the time. This difference in charge and discharge between the cells increases over time, causing irreparable damage and significantly shortening the life of the lithium battery.

    The incorporation of a BMS prevents overvoltage and undervoltage during charging and discharging a lithium battery or BMS.

    Maintenance Lithium batteries

    Unlike other types of batteries such as open lead acid batteries, OpzS Stationary Batteries or TOPzS Stationary Batteries, lithium batteries do not require periodic monitoring if they need to be refilled.​

    Lithium batteries do not require maintenance, nor do they emit gases during operation, so lithium batteries are an excellent option for those uses in which you cannot (or do not want) to be aware of the status of the batteries. lithium.

    All batteries, including of course lithium batteries, are recommended to be installed indoors, protected from direct sunlight, rain, wind and high temperatures to ensure optimal performance, durability and charging efficiency. download.

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