Most solar power systems require an inverter to convert the DC power generated by solar panels into usable AC power for your lights, appliances, and electronics—as well as for feeding excess power to the electrical grid. However, there are a few unique situations in which a system can operate perfectly well without an inverter. While these setups are far less common than ones with inverters, it’s worth noting these exceptions to the rule so that you can better understand the role an inverter plays in a standard solar power system. Keep reading to learn more.
DC-Only Systems
Some systems are designed to run entirely on DC power. Obviously, since the role of the inverter is to change DC to AC, it wouldn’t be necessary in this kind of system, because the electricity generated by the panels can be used as-is. In general, homes and businesses rely heavily on AC power, but there are some cases where a property owner may purposefully set up their property to only use DC, so they can avoid the need for an inverter.
Off-Grid Cabins and Outbuildings
Small, off-grid structures may be set up to rely only on DC appliances and lights. These systems might include a charge controller and battery bank for backup power, but they can still skip the inverter to save on cost and reduce the complexity of their solar power systems. For remote buildings that only need a few lights, a fan, or a water pump, relying only on DC is a distinct possibility.
DC Appliances and Lighting
Don’t assume that a DC-only system is restricted to only basic lighting. There’s actually a growing demand for DC-powered appliances, including certain fridges, fans, LED lighting, and even USB-charging devices. These kinds of appliances tend to be very efficient, so even a low-power solar installation can operate them reliably without converting the power to AC.
Direct Solar-Powered Equipment
In some cases, you might want solar power not for an entire system, but for a single device. For example, many agricultural properties and homesteads use water pumps that are built to run on DC directly from solar panels and/or batteries, with no other devices connected to the power sources. Solar chargers are another example of a DC-only setup, and can be used for charging phones and other electronics; all of these devices charge using DC power, so an inverter is not necessary.
When to Skip the Inverter
If you’re hoping to skip the inverter in your solar power system, it’s important to note that you need to ensure every single device you want to power can run on DC electricity. If not, you won’t be able to operate that device. On the other hand, if you want to power all of your electronics, appliances, and lighting without issue, you’ll need SMA solar inverters to do the job right.