What will a ‘modified’ inverter power?
QI am a little confused over what equipment can be used with a modified sine wave inverter. With a true sine wave inverter, I assume that any 240v equipment can be used.
Things seem, however, a little sketchy on a modified sine wave. In some places people say they are fine to run pretty much anything. While other places say they cannot be used with inductive loads.
Unfortunately, the answer is far from clear cut. The term MSW (modified sine wave) seems to be applied to inverters that provide from an almost square wave through to a trapezoidal wave form, so one may operate certain equipment without a problem while another could destroy equipment.
As an example, it has been reported that some expensive electric toothbrushes and hair stylers have been destroyed by MSW inverters while cheaper versions have seemed to work fine. Likewise, it also seems that some MSW inverters appear to run mains laptop power supplies well but it is reported that, in some cases, the power supplies run hot and the electrical consumption is more than expected. It is well known that items with electronic timers are likely to have problems with MSW inverters so that rules out most microwaves and washing machines etc. Drills and sanders will probably run well enough but might be noisier than usual and run hot, especially if they have speed controls. My view is that, if you want an inverter for more than very light and occasional power use, you would be better off paying the extra for a pure sine wave inverter because that should run anything you or visitors require it to (within its power rating).