As we all know, solar batteries , although not essential, are a great element of a photovoltaic installation. These increase savings on electricity bills, since they store the energy produced by solar panels . The energy can be self-consumed instead of being fed into the electrical network, which leads to a lower consumption of energy from the network. Are batteries for solar panels the panacea to disconnect from the electricity grid and obtain energy independence? In this article we inform you everything concerning solar accumulators:
how do solar battery work.
sorts of batteries for solar panels.
How to choose the optimal battery for a self-consumption system.
The financial savings they stand for and how to maximize them.
Solar panel or collectors: What are they and also just how do they work?
The solar panel are a vital part of a self-consumption system that enable the intake of solar energy after its generation. Like any power accumulator, they are tools where the solar energy created by the photovoltaic or pv system is kept. These accumulators are charged throughout the hrs of solar manufacturing and also make that power available throughout the hours when the sun is not radiating or when it is easier to consume one’s very own power rather than supplying it from the electrical power grid. The link in between the solar components and the batteries for solar panels is made through the solar inverter（For example, 12v inverter is is the most common inverter type), the brain of the installation, or through a fee regulator. Later on we will discuss the compatibility between these 2 devices.
Solar panel batteries: how many types?
Solar accumulators are divided into several types, depending on the technology used by battery manufacturers for solar panels. To make the appropriate choice of batteries, it is convenient to understand all the distinctions, given that not all photovoltaic setups need the exact same type of energy accumulators. According to the technology used to manufacture the batteries, they are divided into these primary categories:
Open Lead Acid Batteries.
lithium batteries.(lithium phosphate)
Open up lead acid batteries are of substandard modern technology. These have a lifespan of 300 fee cycles, which implies that if you charge and also release once daily, the battery will last less than a year. They are planned for small consumption, such as motorhomes as well as can be released approximately 60%, while batteries manufactured with advanced technology are completely released. These batteries need upkeep.
Second on the listing are AGM batteries. Like the open acid ones, they have a short life process, although more than the previous ones presented: 500 cost as well as discharge cycles. They are also used for campers and release as much as 60%. The benefit they have more than open acid ones is that they do not require maintenance.
On the other hand, gel battery, can be made use of in residences also, yet as long as they have a really low usage. These have a longer useful life, withstanding 1,200 cycles. Additionally, they download up to 60%. Stationary solar panels have remarkable modern technology and also deal 3,000 cost as well as discharge cycles. Also, you can download and install approximately 80%. These are useful for big residences or houses that are separated from the power grid.
Finally, the lithium batteries, the ones we use at Otovo, offer up to 6,000 fee and discharge cycles, this being virtually 100%. They are developed for homes with big or separated consumption. Another benefit is their lowered weight.
Just how to choose the very best solar batteries for a home?
The option of batteries (Take 12 volt lithium battery for eample) for a photovoltaic panel system for self-consumption depends upon the energy consumption of the residence and the dimension of the photovoltaic or pv installation. Allow’s state we have a home with a consumption of 6000 kWh/year that has a setup of 10 380W panels.
It is advised to mount a battery with 5 kW of power (5 kWh of energy). If the installation is 14 380W panels, a battery with 10 kW of power (10 kWh of energy) is advised. It is common practice to oversize the system relative to the battery charging power in order to bill batteries as well as self-consumption at the same time. Concerning costs, the rate of some batteries differs. A 5 kW battery is around EUR3,000, while the highest power can reach EUR5,000. As a standard rule, we normally look for a battery that helps us shop as much energy as we are mosting likely to need until the following day. This does not imply that we will always have power in the battery, however it aids to stabilize financial investment and success of the photovoltaic or pv system when picking its capacity.
Solar batteries and also the savings generated.
Batteries make the cost of a solar system extra pricey, consequently its success is less than in the case of systems without collectors. Nevertheless, a system with integrated batteries offers better financial savings on the electricity costs. The battery is the best alternative for those looking for optimum savings on their power bill. If we think about an average system, less than 4 kWp installed, with a 5 kWh battery, it is possible to self-consume approximately 85% of the energy created, thereby releasing less into the electricity grid.
This can decrease the electrical power expense by as much as 80%, because the kWh bought from the electricity grid is far more pricey than the kWh offered, which is around EUR0.06.
On top of that, in the context of power tolls with 3 time slots, the battery (12 volt deep cycle battery) is particularly beneficial in between 7:00 p.m. as well as 10:00 p.m. Between these hours, photovoltaic or pv production is reduced, especially in the cold weather, because it obtains dark early. Also in the summertime, it is reduced due to reduced solar irradiation. Additionally, in between 6:00 p.m. and 10:00 p.m., the cost of kWh skyrockets, being the most pricey time port of the day, heavy traffic.
Conclusion on solar batteries
In a sense, solar generator is also a special type of solar battery, having solar batteries for solar panels has its advantages as well as disadvantages. The major advantage is the disconnection from the electric network. Numerous residences intend to be energy independent and also in other cases they are homes in separated locations where attaching to the network can be a lot more complicated. Nevertheless, this requires an extremely important risk on the occasion that days pass without the sun, leaving your house without light, in the 19th century. On the other hand, a off-grid solar system with batteries is much more pricey than one without them and it have to be taken into consideration that solar components have a longer valuable life than batteries. Likewise, some of them require upkeep.