Battery Battery is a device that stores energy for further use. It is a device that can convert chemical energy. Direct electricity is generated by the use of galvanic cells containing anode and cathode. Along with solution An electrolyte solution. The battery may consist of one or more cells of galvanic cells. The battery is a device for storing electricity only. Not electricity Can recharge (Recharge) many. The times and efficiency will not be 100% to around 80% because some of the energy lost in the form of heat and Chemical reaction from charging / discharging itself. Batteries are expensive devices. And easily damaged. If not treated well. Sufficient or misuse, including the lifetime of each battery, will vary. Due to its use, maintenance, temperature and temperature, etc. The battery suitable for use with most solar power systems is Deep discharge battery because it is designed to be able to. Spend more or less energy for a long time. Without damage We will be able to use up to 80% The battery is not damaged. Unlike a car battery designed to power high A short time If more than 20-30% of the stored energy Will shorten the life. Most of the batteries used in the solar system. It looks like the top cover is open. To be able to check the cell And add water at the time. The necessary is called open cell or unsealed or flooded cell battery. Some types are closed and require no maintenance. Maintenance free batteries (Sealed battery), both types that are rare and very expensive. Battery suitable and easy to find in our home. I recommend a Deep Cycle type refill water tank. Today, many companies that produce batteries have been sold out, such as YUSA, 3K, TROJAN. The Deep Cycle battery is about 2 times more expensive than a car battery, but it lasts longer. Car battery Chart is easier. More power If you compare the amount of electricity with the battery price. We pay Deep Cycle batteries will last longer. Multi-car battery And best value In order to use the battery size to suit the solar cell size, consult with the installer. Solar cell system Because there are many variables that need to be designed to suit each job and client. Or each user has a style of use. Different jobs Left: open cell battery Right: Battery without maintenance If you choose to use car batteries because it is cheaper or easier to find. It is necessary to introduce. Should choose a battery suitable for the system is the size. Battery and solar panel size Should balance Because many car batteries have low charging currents, it means that if you use solar panels that produce electricity It is low, such as amorphous type solar cells, it should not use the car battery. Too big Because it will not charge. For example, some car batteries 12V 150Ah. Requires charging current of more than 5 A to charge the battery. If you want to bring this battery to use in solar cells. Ensure that solar cells produce electricity. Electricity more than 5 A The power of the solar panel. The power (current and difference) that it is. It depends on the quality of solar or the amount of sunlight. Between 6.00-9.00 and 16.00-18.00 hours, the power will be less than 10.00-15.00 hours if your system battery is a large car battery, such as 12V 120Ah. Up to 6.00-9.00 am and 16.00-18.00 am, the power may not be charged at all. Have to wait for the sun before. And that is why we should choose Deep Cycel battery. This type of battery can be charged even if the charging current is low. That means we will have instant power. Sunny