Today it is the 1st of April: April Fool's Day!!!
Please take a look at the width of the PCB traces: at such power (1000W/12V) the
MEAN current will be
more than
80A.
Let's suppose their width is 30 mils and the thickness of the copper 70 um, the maximum current (with a temperature rise of 40°C) possible will be 6A!!!
Not mentioning the voltage drop for a 20cm track length: about 0.48V
With a such load the PCB tracks will vaporize in few seconds!!!!
Take also a look at the acid traps in the really POOR layout of the PCB...
And I just do not want to discuss about the schematics/components used!!!
BEWARE!!!: do not try to reproduce this "project". It is absolutely CRAP!!!!
Please remember this simple rule: with a power supply of only 12V it is almost useless to develop an inverter with more than 600W power. The losses in cables/connections/components will waste the most part of the energy in heat.
Over 600W of continuous power is ALWAYS suggested to work with at least 24V, even better 48V or more.