Since the beginning of winter in 2022, affected by the war in Russia and Ukraine, the problem of energy shortage in Europe has gradually emerged, and solar energy has become a hot energy source.
Recently, there has been a craze for balcony solar systems in Germany. This simple plug-and-play solar system requires only an AC power outlet, without a distribution box, and can be installed by non-professionals, so it has attracted much attention. At the same time, microinverters have become the first choice of many people.
What is balcony solar? Why invest in balcony solar? How to choose a balcony microinverter? Details are as follows.
Cost-effective initial investment. Simply one or two solar panels and a microinverter, usually with a cable length of 5-10 meters, can build a balcony solar system.
Referring to the general price in the Europe, a solar panel is 200-400 Euros, and a microinverter is 100 Euros. If you buy two panels, you can realize your solar energy investment plan for less than 1,000 Euros.
Preparations: First observe the condition of your balcony railings to check the stability, and then check the orientation of the balcony. Taking the northern hemisphere as an example, it is best to place solar panels facing south.
Solar panel: Install the fixing parts according to the installation manual, then carefully hang the solar panel on the railing or the prepared support to check the stability. Brackets are safer as protection because they are installed on the floor at a slope. The proportions of the panels are determined by the balcony area.
Microinverter: Pre-arrange the AC bus at the appropriate position of the microinverter, install the microinverter on the bracket or on the frame of the solar panel, closely connect the AC port with the AC bus connector. Finally insert the plug into the AC outlet to power on.
After powering on, the solar panel on the balcony generates direct current after being irradiated by sunlight. The microinverter converts direct current into alternating current, and then supplies it to household loads such as washing machines, refrigerators, and air conditioners. Excess electricity will be sent to the public grid.
In the northern hemisphere, for example, the panels are placed on balconies facing south, and in the southern hemisphere facing north.
According to the survey, placing the panels at a 45-degree angle to the horizontal line, and placing them at different directions in the morning and evening, can effectively increase the power generation.
As the temperature rises, the maximum output power of the solar panel will decrease, and the conversion efficiency of the microinverter will also decrease. In order to avoid the influence of temperature on the power generation, the panel should be kept in good ventilation conditions.
The panel is placed outdoors, and the dust on it will cause a loss of production capacity, which is about 4-6%. The balcony panels are easier to clean than the roof, and should be wiped frequently to reduce the impact of dust on the power generation.
Maximum Power Point Tracking (MPPT) is a technique used in variable power supplies to track the maximum output power point of a solar panel. The MPPT function of the on-grid system will be completed in the inverter, so it is important to select a suitable one.
Solar incentives are very substantial. You can get a 50% tax deduction on the cost of the purchase, which can be reclaimed within 10 years by tax returns, or deducted from the invoice by transferring a 50% credit to the person who installed the panels.
The less upfront cost of balcony solar system can save your electricity bill compared to a rooftop PV array, which the power cannot be stored and will mostly be used in your home’s appliances. Reasonable allocation of electricity consumption time can effectively save electricity bills.
It can be carried when moving or camping. Small solar panel and microinverter are both portable, you can put them in the trunk of your car and travel with you.
There is no need for a large roof of the self-built house, just a spacious balcony with sufficient light; no need to hire professionals to install, but realize plug-and-play by yourself, saving installation costs.
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