WHAT IS THE BEST BATTERY FOR SOLAR APPLICATION?
If you are dreaming of owning your own best battery for solar application, buying the best is must thing to do. Solar batteries serve as a backup as well as energy storage for solar and can run everything in your house. Solar batteries are not ordinary batteries, like those that can be found in a car. These are so-called slow-cycle batteries that have been specially designed and made for solar applications in the field of wind energy or solar panel. Their main differences lie in their much slower unloading speed and they support the alternating loading and unloading phases much better.
WHAT ARE SOLAR BATTERIES?
Solar batteries are designed to store the energy provided by solar panels and restore it in electrical form. The solar battery is a device that stores the energy generated by photo voltaic solar panels to provide power, in anticipation when there won’t be enough sunlight. It is a slow-cycle battery, specifically designed for solar or wind applications. The batteries of phones or laptops operate on the same principle as solar batteries, but the amount of energy stored is not the same. A phone battery stores a few amp hours (Ah), while a solar battery can store several hundred. A solar battery must, however, to maintain an optimal life, not have a charge rate that is greater than 90%, nor less than 40%. This is why you should avoid connecting the solar battery directly to the panels, but rather behind a regulator so that it optimizes these parameters.
HOW DOES A SOLAR BATTERY WORK?
Solar batteries are also called stationary (or semi-stationary) batteries. They work by storing energy storage for solar so as to come up when there is there no sufficient sunlight. These batteries are thus designed to continuously provide a stable current for a relatively long time while ensuring its recharge, allowing these batteries to perform cycles of production and regeneration. Different types of stationary (or deep cycle) batteries are available on the market (2, 6, and 12 volts). These different powers will be adapted according to the number of energy production cycles of the solar application. It is actually the repetition of the cycles of charges and discharges that these batteries are adapted, something that a traditional battery cannot do.
BEST BATTERY FOR SOLAR APPLICATION
There are different types of battery for solar application but, our team of experts has taken their time to analyze the best ones in the market.
• LEAD GEL BATTERY The lead-acid GEL battery is composed of standard lead-acid accumulators. It usually provides a voltage of 12 V or 24 V. The open lead battery is economical to buy; however, there are some details not to neglect. In relation to its weight, the power it produces is minimal; in general, this power is 35 WH / kg. It regularly requires hydration and the use of a scale-acid to check the density of the electrolyte. It should be installed in a well-ventilated area to handle oxygen and hydrogen ejections when recharging. It is advisable to save after 30% of discharge, otherwise, it supports nearly 400 cycles of charges and discharges. In addition, it is required to lay flat because it is not waterproof.
• AGM Battery AGM is the abbreviation for Absorbed Glass Mat. With a lifespan of 1500 cycles at 30% the AGM battery is ideal for supplying consumers who need a very high starting power. It does not require maintenance. Be careful, however, this battery is resistant to high temperatures and deep discharges. Similarly, in place of the water and acid solution found in the open lead battery, the structure of the AGM battery electrolyte is based on fiber sheet. It’s very expensive, but it is worth it. First, its energy output relative to its weight is good. It can produce an electric charge corresponding to 250 Ah.
• LITHIUM-ION BATTERIES This new technology, whose estimated lifespan is 5000 cycles at 50% (more than 10 years normally), is more expensive and more complex to install. They are reserved for portable photovoltaic systems where their large discharge capacity (six times better than lead batteries) is of great interest. A lithium battery contains series-welded cells, and an electronic card, or BMS (acronym for Battery Management System), present to manage the charging and discharging thereof. This very young technology looks promising and is in constant development. Lithium-Ion batteries can be classified into different categories, but above all, into two main branches, which are lithium metal, and lithium-ion. One of the best and cheapest lithium-ion batteries for the solar system is LiFePO4. This battery can be used in 12V, 24V, 36V or 48V systems at just 29 lbs. and lasts 10 times longer.