UPS, PWM Sine wave or True Sine wave

[theokie]

Some more searching and I came across this image


A few diodes and this would do it, just have to sell the other half on this, pretty picture might help. As with the cost of this type of setup, I could get a DC pump to lower the power consumption, and have the backup, for the cost of just buying the backup. I guess its time for the hard sell to the other half