In recent years, the evolution of portable power has led to the rise of a new generation of devices that combine the best features of traditional portable generators and modern inverter technology. These units, known as open-frame inverters, are quickly becoming popular for those who need reliable, efficient power on the go. These units offer a compelling mix of features that make them ideal for various applications, from camping trips and outdoor events to emergency backup power.
Let’s start with the basics. An open-frame inverter is essentially a hybrid between a traditional portable generator and an inverter. Like traditional generators, open-frame inverters have a gasoline engine that powers an alternator, but they also incorporate the advanced technology typically found in smaller, more compact inverter generators. The result is a unit that offers the versatility and durability of a portable generator while benefiting from improved fuel efficiency, quieter operation, and cleaner power output for which inverters are known.
A key advantage of open-frame inverters is they combine the ruggedness and power output of a standard generator with an inverter’s innovative technology. Inverters are typically known for producing clean, stable power with less harmonic distortion, making them ideal for powering sensitive electronics like laptops, phones, and televisions. However, they also tend to be more costly and heavier due to the need for a plastic enclosure, insulation, and higher assembly costs.
Open-frame inverters eliminate the need for these additional features by operating in an open-frame configuration, meaning they lack the heavy plastic casing found in traditional inverter generators. This simple yet effective design makes them significantly lighter and more fuel-efficient compared to their encased counterparts.
Another standout feature of open-frame inverters is their low idle mode, where the engine RPM (revolutions per minute) adjusts dynamically based on the power demand. This means that when the unit is not being heavily used, it operates at a lower RPM, consuming less fuel and producing less noise. When demand increases, the engine adjusts accordingly to provide the necessary power. This adaptive operation ensures better fuel economy but contributes to quieter operation, as the engine isn't constantly running at full speed.
Compared to a traditional portable generator, which typically runs at a constant high RPM, an open-frame inverter provides better fuel economy and a more pleasant noise level, especially when only light power demands are needed. In fact, they are only slightly louder than their encased inverter counterparts, making them a solid choice for those who want efficiency without sacrificing too much in terms of noise.
Because open-frame inverters don’t require the bulky alternators and enclosures of traditional portable generators or inverter units, they tend to be significantly lighter. This makes them easier to transport and store, which is a key benefit for people on the move or those with limited space for storage. You get the convenience of a portable power solution without the added weight.
In addition to being lightweight, open-frame inverters also offer a lower cost per watt compared to traditional suitcase-style inverters. This is because they forego the added cost of the plastic casing and complex assembly processes, resulting in a more affordable option for those who want the clean power and portability of an inverter without breaking the bank.
Open-frame inverters can also be paralleled with another unit. This is particularly useful for those who need more power than a single unit can provide. By linking two units together, users can double their available output without investing in a larger, more expensive generator. This versatility makes open-frame inverters a great choice for both small-scale and larger power needs.
A-iPower is at the forefront of this technology with open-frame inverters that offer portable and reliable power solutions for numerous applications. For example, our SUA4600iF generates 4,600 starting watts and 3,600 running watts, providing ample power for various RV appliances and equipment. The clean, stable source of power is perfect for sensitive electronics such as laptops, TVs, and phone chargers. It also has five power outlets, a CO sensor with automatic shutdown technology, a three-year warranty, and weighs in at just 56 pounds. Overall, A-iPower’s open-frame inverters offer a unique combination of performance, convenience, and safety to meet a user’s diverse power needs.