We mentioned that solar power inverters make DC ->AC voltage conversion. Inverters' output voltages are the same with the necessary input voltage values for the electronic devices that are sold to work. Their intended use is to take the DC voltage which is found in solar panels or batteries and convert it into AC voltage that these devices can use.
Power Inverter Output Voltages: City grid voltages have values such as 110V, 115V, 120V, 220V and 240V around the world. That's why the power inverters that are produced have AC outputs which have these voltage values.
According to Power Inverter production technologies, solar power inverters can include many different protection systems. The most well known protection systems are;
Over temperature shutdown: They are also known as thermal protection systems. When a power inverter converts power over the capacity it has or at values very close to this capacity it may overheat and break down. Electronic parts generally start to break down over 90oC. In order to prevent this from happening, heat sensitive sensors are placed inside the power inverters, and this enables shutdowns at high temperatures or decrease of the power transmitted. These parts called PTC or NTC send the necessary temperature information to the central processing unit when high temperatures are reached and this activates the protection.
Automatic Overload Protection: Overload protection which is another protection system, works in order to prevent breakdowns caused by burns of the parts which are caused by power load which exceeds the capacity of the device. For example, if an inverter which has 4000W capacity is loaded with 4300W power, the protection system is activated and gives the necessary warning to the user such as closing the device and decreasing the transferred power.
Ground Fault Protection: In high capacity solar cell power inverters, grounding systems are essential. In order to protect the devices that are connected to the system and in order for the inverter to work more efficiently, the grounding should be done properly. If a high capacity power inverter has not been grounded properly, by means of the protection system that it has inside, it will warn the user and carry out the necessary processes. If grounding is not done properly, ground, not short circuit connection is carried out automatically and thus the system is protected.
Short Circuit Protection: By means of this protection system, the short circuit problem which is caused by the output cables touching one another due to user misuse is prevented. During short circuit, the device is immediately put on passive condition and is shut down. Other names for this protection system are known as AC Overcurrent protection and DC Overcurrent protection.
How to wire Solar Panels to Inverter? We mentioned that solar power inverters have certain input values. For example, an inverter which has 24V input value works properly between the 22 – 28 V range. In order for solar panel blocks to be properly connected to inverters, the solar panel output voltage should be compatible with the power inverter input voltage. We have written other articles about solar panels and parallel and series connections of solar cell systems.
Example: How can we wire 10 solar panels with 24V output capacity to a solar power inverter which has a 48V input value? Here the important point is to make the solar panel connections the same as the solar power inverter input. That's why we have a solar panel block which has the power of 48V and 5I and is comprised of 5 X parallel and 2 X series connections, and this block is wired to the inverter.
How Much Power Do You Need? You have to specify where and how you will use the inverter. For example, if you are going to use it at your house, you should know for how long you are going to use the device and the power of this device. For example, if you have 2000W washing machine, 1000W dishwasher, 200W television and 500W lighting system, assuming that those devices work at the same time, you should get an inverter with the power of 3700W. It would be more suitable to get an inverter that has a power a little higher than this power however, for example 4000W.
What is your Total Solar Panel System Power? The total power of the solar panels that you have will be what determines the power inverter that you will require. If you are providing the power that you obtain from the solar panels through the solar inverter directly to the grid without storing it, the total inverter power should be close to the value of the solar panel system power. For example, if you have 10KW solar panel system power, it would be suitable for you to use an inverter with 10KW power. If you are storing the power that is obtained from the solar panels in accumulators, you can use an inverter with a lower power.
Where to use the Solar Power Inverter? Solar power inverters can be used in many areas. We mentioned that there are power inverters according to their output wave form types.
If you the power inverter is going to be used on simpler electronic devices or lighting systems, you should choose inverters with modified sine or pure sine output. You can use this type of inverter in vehicles such as cars, boats or recreational vehicles.
Some power inverters have special software which allows them to be monitored and controlled remotely. Over the internet or broadband network and via computers or smart phones, the data on the power inverter can be read and the inverter can be controlled. Much data such as total power, input voltage, output voltage, working time, malfunctions or faults can be monitored remotely. Wellsee new energy company is specially dealing with various inverter,welcome to contact!