How to upgrade a Modified Sine UPS to Pure Sine? Answered
How could I upgrade an uninterruptible Power supply that has a Modified Sine Wave to Pure Sine wave?
I got a cheap 400 watt HP UPS (for a tenner) with a modified sine wave; then got to discover it would be much nicer that is was a Pure sine Wave ^^. The purpose is to use it as an inverter for most household items (in a solar set-up).
There are videos to increase wattage but I have not found yet something informative enough to upgrade to pure sine.