The internet is full of this statement and example (also in Will videos):
"Watt is instantaneous power. 1000W load running for one hour is 1kWh. "
So that means if all your loads sum up to 1000W then you need at least 1000W inverter.
All of this does not make sense to me.
If a device has rating of 1000W it means this is the average power consumed over a whole hour, right? it does not mean it will suck 1000W at any given second. because if it really a load that sucks 1000W as instantaneous power and it was running for an hour that means if we are measuring and recoding it every second it will be 1000Watt/Second which means 1000watt.sec * 3600 = 3600kWh and not 1kWh.
So why the whole internet takes the average power of appliances as base of sizing the system? a device that is rated 1000W is actually on average is just consuming 1000W/3600= 0.27W So why do I need 1000W inverter to drive such small load of 1W
Please assume the load is pure resistive load for the sake of simplicity.
"Watt is instantaneous power. 1000W load running for one hour is 1kWh. "
So that means if all your loads sum up to 1000W then you need at least 1000W inverter.
All of this does not make sense to me.
If a device has rating of 1000W it means this is the average power consumed over a whole hour, right? it does not mean it will suck 1000W at any given second. because if it really a load that sucks 1000W as instantaneous power and it was running for an hour that means if we are measuring and recoding it every second it will be 1000Watt/Second which means 1000watt.sec * 3600 = 3600kWh and not 1kWh.
So why the whole internet takes the average power of appliances as base of sizing the system? a device that is rated 1000W is actually on average is just consuming 1000W/3600= 0.27W So why do I need 1000W inverter to drive such small load of 1W
Please assume the load is pure resistive load for the sake of simplicity.
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