For emergency backup get an 500 W inverter that can run off a car or a PREDATOR1400 Watt SUPER QUIET Inverter Generator W/Longer runtime: Up to 7.3 hours. The equipment list is for a 150 gal reef tank. All of the numbers used were rounded up and are average taken from other websites. 1HP chiller rated at 6,000 BTU/hr Return Pump - 1200GPH 72W
AI Prime Fuge light - 25W
3x AI Prime 16HD tank lights - 85W total
Aqua Ultraviolet Light - 20W
2) of hydor koralia wave makers - 5W
Bubble Magus Protein Skimmer - 25W
Transfer pump for UV Light 4000lph - 35W
mini PC for my Seneye (dell mini) - 30W
Heater - 400 W winter month average 15W
2) of Jabeo wave makers - 20W In total 334 W per hour with lights on, with lights are off 224 the average is watts per hour average 280 over a 24 hour period.
Average Power consumption: 280W
Hours of use per day: 24h/day
Energy consumed per day: 6.72 kWh/day
1 kilowatt-hour (kWh) cost: 0.12 cents per Kw
Energy cost per day: .8064 average
Energy cost per month: $25
Energy cost per year: $300 Enter your total watts on this website
https://www.rapidtables.com/.../energy-cost-calculator.html
PS. I my home has a Tesla 7.5 solar system with a Tesla 5.8 backup battery.