While there are a number of products that may still cause problems working with a quasi sine inverter, there are many more that are able to work alongside one without any problems. A quasi sine inverter is able to be smaller and lower cost than pure sine wave inverters. While there still are products that do not work well with a quasi sine wave inverters, given their cost they are more than adequate for most jobs. 

The Sterling Pro Power Quasi Sine Wave Inverter is ideal for running 95% of 230V AC equipment such as microwaves, hair dryers, kettles, fridges, freezers, power tools, laptops and more from your 12V battery. Able to operate the majority of 240V electrical products, except for anything controlled by a thyristor. The Sterling Pro Power Quasi Sine Wave Inverter is suitable for use on any boat with a 12V system. 

Features:
Aluminium housing for superior heat transfer and durability.
Automatic shut-down on low battery voltage.
Automatic shut-down on overload.
Automatic shut-down on over-heating.
British and European 240V sockets. 
Compact size.
High surge capacity.
LED power status indicators.
Master on and off switch.
Quasi/ modified sine waveform output.

Specifications: