With vast advancements in the energy sector, solar power systems are no longer a new concept. In fact, solar generation went up by a whopping 36% only in the first two months of 2022.

This significant increase in installation with each passing day can be attributed to increased savings from the electric bill. Also, the overall solar panel cost has been reduced by 70% since 2010. Given such factors, more people are actively trying to switch from conventional electricity generation sources.

However, you must know the solar system’s working process before moving ahead. Is it AC or DC? Will it work well with devices in your home? If not, how can you use the battery storage to your advantage?

If your AC/DC knowledge is limited to the music band, continue reading further to learn more about this concept!

AC and DC – Basics

The late 1870s and early 1880s witnessed a science battle, now popularly termed the “War of Currents.” Here, Thomas Edison and Nikola Tesla were embroiled in AC or DC propagation.

Edison introduced the world to DC (Direct Current). It runs in a single direction and was initially hailed as the standard form of electricity in the US. If you visualize the flow of DC, you will observe a straight-line graph.

However, multiple shortcomings were faced while using DC on a large scale. First, the current didn’t convert into a low or high voltage value conveniently. Additionally, transporting it across a long distance resulted in huge electricity losses.

To overcome such drawbacks, Tesla introduced Alternating Current (AC). It is a form of electricity where electrons run back and forth in both directions. If you visualize the graph, it looks like a sinusoidal wave or a vibration.

What Electric Charge Do Solar Panels Generate?

Solar panels consist of photovoltaic cells. Here, when the sun rays fall on the panel surface, some electrons are knocked loose from the atoms of the semiconductor surface like silicon. As these electrons flow in the same direction, the solar energy generated is in the form of DC.

However, this resulting power is unregulated and cannot be used to operate any appliances directly. Therefore, you require some electric circuits to make it properly usable. That’s where solar inverters come in.

Solar or PV inverters help convert the DC generated from the solar panel to AC voltage. The resulting AC charge is acceptable by the electric grid and can be further utilized to use electric motors, refrigerators, televisions, or other home appliances.

Rooftop Solar Panels

How Do Inverters Convert DC into AC?

Inverters first originated in the 19th century and worked on mechanical phenomena. However, things have significantly changed in the past two centuries. Initially, inverters converted DC power to AC power by quickly switching the output current’s polarity from positive to negative.

The resulting motion resembles a square wave and gives an increased voltage value with the decreased current. However, there is a significant disadvantage to this process. The square waves are often abrupt and can end up causing substantial harm to electric appliances in your household.

To overcome this issue, manufacturers have now started working with rectification devices that produce modified sine waves (MSW). They are gentler for a household system and less likely to cause irreversible damages.

Therefore, when multiple solar panels are installed on a rooftop in a fixed pattern, output power lines are connected to the DC input for the inverter. Usually, the DC voltage range for smaller installations does not cross 1,000 volts. However, the DC power value can be as much as 1,500 volts for large-scale industrial installations.

What are AC Solar Panels?

On hearing the term AC solar panel, one might assume that such devices are perfectly capable of generating AC power directly. But that’s not the entire truth.

The basic process of electricity generation remains the same in this solar system as well. However, instead of connecting all panels in a line and then attaching an inverter, each panel here comes attached with a microinverter.

AC solar panels are more expensive than their conventional counterparts. Nonetheless, the increased price brings along some essential benefits like:

  • The installation process gets much smoother and requires less time as there is no need to establish a central inverter connection.
  • In a conventional setting, the inverter works like an Achilles heel. It prevents other panels from performing at their maximum capacity if one device is faulty.
  • With AC solar modules, you can install panels anywhere without worrying about the design orientation and distance from the inverter.
  • You can easily track the performance of each panel and how much power it generates.

Domestic Solar Panels

Is DC Power Generated by Solar Panels Still Beneficial?

Even though most appliances use AC, new power supplies in the market rapidly propagate the usage of DC power. Some standard DC applications you must know of are renewable energies, electric vehicles, power electronics, HVDC transmission systems, etc.

DC conversion to AC can result in high electricity costs and is often more expensive. Therefore, new technological inventions are focused on making the household load compatible with direct current flow.

Wrapping Up

The solar field is rapidly progressing and offering the world a chance to utilize a non-exhaustive energy source for daily electricity requirements. Instead of a power plant, consumers can simply set up photovoltaic panels on their roofs and harness the current generated by sun radiations.

However, this resulting electricity is in the form of a direct current where the electrons only flow in a single direction. Most household appliances are not compatible with DC. Therefore, power supplies like a solar inverter must be installed to convert DC into AC.

The energy stored in the battery is in the form of DC. When needed, the charge passes through the inverter and reaches the electric devices in the form of AC. Simultaneously, multiple changes are happening in the solar field, propagating the usage of hybrid DC and AC systems.