Solar panel battery storage ensures that you can store and use the generated electricity whenever you want. What comes to look at backup power battery? A storage cell stores the power for later. It gives you freedom, and you are no longer dependent on the energy companies and government.
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A battery for the home (or office etc.) is not new at all, but in homes and buildings, you do not see it that much. But in boats and campers, it is very typical. The storage facility for house solutions is beautiful because you become more independent of energy suppliers and can store the electricity of photovoltaic panels for later.
Using generated energy directly or store in batteries for later use or feed in to the grid. You are free and no longer dependent on the grid arrangement. A grid-connected solar energy power system with storage cells usually has a control station between the panels, the electrical equipment and the home battery. It is called a hybrid grid inverter.
Fortunately, these battery technologies have another advantage that most people overlook. If there is no sunshine, charge an empty DC cell with cheap off-peak electricity. To be used later at higher rates.
This difference in tariff is small. But may become more substantial in the future, when more wind and sun is supplied to the electricity grid to make the network smarter ('smart grid').
The generated kWh electricity that you do not use will be stored and used when you need it. That is why we are now looking at how such a storage facility works exactly. What choice in brands and models you have and of course what the costs are.
There are already many people who have been storing the electricity of PV modules for a long time for later. Think of owners of campers who have a solar PV panel on the roof, boat owners who want to be able to stay anywhere and many sheds that have a small photovoltaic module and a little battery to be self-supporting even without NUTS facilities and that is beautiful? You often still need a connection.
A connection of 220V / 230V remains unfortunately also with a home battery almost always inevitable. This is due to the large seasonal differences in the generation of kWh. With a storage cell, you can store electricity for a few days; your abundant summer stream for the dark winter is not possible because it is too far away.
If you look at that as a household, you can generate enough energy with solar panel system. And keep running your entire house and also drive a electric car. Your house and all your miles a year on car batteries. That way you are 100% independent of the network and over a period of time you have earned back your investment.
You may already have calculated how much Watt-hour a day is going to need. An average household consumed about 3,300 kWh per day, which is 1204 kWh per year. If you assume a smaller need in a calculation, example: for 1 person who lives economically, we arrive at the following calculation example:
Lets take 1028 Watt-hours per day. With this, you want to know what type of battery that can store this capacity at least. The description size of a cell is in Ah. ( Ampere hour). The number of ampere-hours is the amount of power that a battery can deliver for an hour.
To convert the number of watt-hours to the number of ampere-hours of the cell, the voltage of the battery is essential. The voltage of cells is generally 12V (12 Volt), and the conversion is as follows:
The number of Watt-hour / 12V (voltage of the accu) = number of ampere hours.
We continue with the example:
So with this, we can determine what the right cell capacity should be. There is namely: 1028wh / 12V = 86 amperes hours.
It is wise to take a battery with a capacity that is at least twice as high. This way you will never be without power.
So if you take 2 times that capacity, you get: 86 x 2 = 172 Ah.
Conclusion calculation: You need a storage facility of 12V, 172 Ah for a requirement of 1028 Watts
Keep in mind that there is a different calculation for lead-acid batteries!
With a completely independent solar power panel installation, a lithium ion battery is an essential part of the whole. Not used power stores into batteries. With an average capacity, there will always be multiple batteries connected in series. Otherwise, you would need 1 large energy storage facility.
To take into account is the maintenance of the system. An independent PV system is significantly more maintenance-sensitive than a grid-connected one. Every six months the batteries must be checked and maintained. The cells must free of dust and cleaned to prevent short circuits.
Personally, I believe very much in the system of storing energy myself. You can not only connect everything in your shed that has no electricity connection but also in your own home or business. Through the batteries connected to the solar panels, you have everything you want, without the energy supplier. Saving money on the electric bills with investing.