HOME / what is a solar inverter and why is it important to solar panels
To wire solar panels in series, connect the positive terminal on the first panel to the negative terminal on the next, and so on. The resulting voltage will be the sum of all of the panel voltages in the series. However, the total current will be equal to the output current of a single panel.
So, if you connect two solar panels with a rated voltage of 40 volts and a rated amperage of 5 amps in series, the voltage of the series would be 80 volts, while the amperage would remain at 5 amps. Putting panels in series makes it so the voltage of the array increases.
Definition: In a series connection, solar panels are linked end-to-end, where the positive terminal of one panel connects to the negative of the next. Effect on Voltage: Adds up (e.g., two 12V panels = 24V total). Effect on Current (Amps): Stays the same as a single panel. Best for increasing system voltage.
The output voltage is 54 volts (18V + 18V + 18V = 54V), yet the output current is still 6 amps. Solar panels in series are optimal in unshaded conditions. If shade covers a single panel of your series array, it will bring down the whole system's power output. Each panel in a series connection is critical.
The grid-connected solar inverter operates according to a simple basic electrical theory. From a higher potential to a lower potential, the current flows. The grid-connected solar inverter attempts to keep its output voltage greater than the grid voltage. Net current flow from solar to the grid is the result of this.
Grid-connected PV inverters have traditionally been thought as active power sources with an emphasis on maximizing power extraction from the PV modules. While maximizing power transfer remains a top priority, utility grid stability is now widely acknowledged to benefit from several auxiliary services that grid-connected PV inverters may offer.
In order to provide grid services, inverters need to have sources of power that they can control. This could be either generation, such as a solar panel that is currently producing electricity, or storage, like a battery system that can be used to provide power that was previously stored.
A grid-tied inverter, also known as a grid-connected or on-grid inverter, is the linchpin that connects your solar panels to the utility grid. Its primary function is to convert the direct current (DC) electricity generated by your solar panels into alternating current (AC) electricity that can be used to power your home or business.
The input specifications of an inverter concern the DC power originating from the solar panels and how effectively the inverter can handle it. The maximum DC input voltage is all about the peak voltage the inverter can handle from the connected panels. The value resonates with the safety limit for the inverter.
Maximum Input Short Circuit Current DC (A). This indicates the maximum short circuit current that can be input on the DC side of the inverter. Minimum/Nominal Input Voltage DC (V). This indicates the minimum voltage that can be input on the DC side of the inverter. Maximum Operating Current in DC (A).
Aside from the operating voltage range, another main parameter is the start-up voltage. It is the lowest acceptable voltage that is needed for the inverter to kick on. Each inverter has a minimum input voltage value that cannot trigger the inverter to operate if the PV voltage is lower than what is listed in the specification sheet.
Some solar inverters support multiple DC inputs, allowing you to connect several strings or arrays of solar panels. The maximum number of DC inputs specification informs you of the inverter's capacity to accommodate multiple inputs, which can benefit larger solar panel installations.
Get technical specifications, product datasheets, and installation guides for our PV-ESS container solutions.
Porto Sarti, Sarti Beach Road, 25
63072 Sarti, Greece
+30 23750 24100
Monday - Saturday: 8:00 AM - 6:00 PM EET