To whom is that addressed ?
KWH TO KW- generator sizing
- Thread starter Jacob Gerstner
- Start date
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
- Occupation
- Electrician
Yes you, sorry I thought I quoted you.
Then no, I do not mean kWh instead of kVA
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
- Occupation
- Electrician
Okay well you said KVA at first, and I must have quoted you before you edited it and corrected it.
- Location
- Connecticut
- Occupation
- Engineer
If you read what he wrote...he's not correct.
- Location
- Connecticut
- Occupation
- Engineer
It still says kva. And you are correct, it is still wrong.
Think of it as rate - not energy.
winnie
Senior Member
- Location
- Springfield, MA, USA
- Occupation
- Electric motor research
Please don't get caught up in the typo. See post 3 vs post 10. Beo clearly understands the difference between kW, kVA, and kWh.
- Location
- Connecticut
- Occupation
- Engineer
Kva doesn't have a "rate"
- Location
- Connecticut
- Occupation
- Engineer
Typo? He's insisted in post #23 that he meant kva, not kwh.
Thank you kindly, Mr Winnie. Now I have done with this topic.
- Location
- Connecticut
- Occupation
- Engineer
So, your are saying electrofelon was correct that you were mistaken?
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
- Occupation
- Electrician
Yeah strange. I thought it was a typo at first, I scrolled back and thought it had been edited to "KWh" but I must have been looking at a different post. He definitely seems to be insisting that KVA is energy.
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
Without quoting reference posts it is easy to get confused.
Post 3 uses the terms KWn and KW
Post 10 uses the terms KW and KVA.
I would have thought this was a simple typo issue except for post 23 which also says KVA.
I have not seen any editing of any posts, where terms were changed.
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
- Occupation
- Electrician
Ok I think I hope we all can agree:
KWh is energy
KWn is "kilowatt nanoseconds" used to measure large amounts of energy
KW is power
KVA is close enough power
KWh is energy
KWn is "kilowatt nanoseconds" used to measure large amounts of energy
KW is power
KVA is close enough power
Well, might as well get my two cents in..
KVA and resistance are DC
KW and impedance are AC..
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
- Occupation
- Electrician
KVA can be energy. I had to mount a 25 KVA transformer to the ceiling once, and another time unload (2) 25 KVA transformers from the back of my truck without equipment. That took some energy!
Birken Vogt
Senior Member
- Location
- Grass Valley, Ca
We don't really take LRA into account on residential like this. Well pumps and scroll ACs are not that hard to start and the load calc is so oversized and larger generators have plenty of excess short term capacity to start these things anyway.
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
This can depend on the prime mover of the generator to a certain extent as well.
I have a portable generator that is rated 8000 watts, but also has a starting capacity rating of something like 12,000 watts. It will start my 3 ton heat pump that suggests MOCP of 45 amp breaker. It won't start it rather instantly like utility power does, it takes a couple seconds. The generator breaker will not hold trying to start this if there is much of anything else for load at the time of starting, but once running you can add other loads .
jaggedben
Senior Member
- Location
- Northern California
- Occupation
- Solar and Energy Storage Installer
We do when our backup generators are inverter based.