The the SC745TQ-920 chassis, may I buy another power module PWS-920P-1R to make it redundant? May I also buy two 1200 watt power modules PWS-1K21P-1R to make it 1200 watt redundant? Any 1400 watt redundant solutions available?
Yes, you can use two 920 modules to make it redundant. You can also use two 1200 watt modules to make it 1200 watt redundant. No solution available for 1400 watt redundant.