me too...Hope it was his generation meter
Discuss Something does not add up.. in the Solar PV Forum | Solar Panels Forum area at ElectriciansForums.net
me too...Hope it was his generation meter
not in my world they don't.They do in a vacuum, plus terminal velocity of all items falling to earth not acted upon via other forces will be the same :tounge_smile:
Now lets get back to Ohms Law ...... lol
They do in a vacuum, plus terminal velocity of all items falling to earth not acted upon via other forces will be the same :tounge_smile:
Now lets get back to Ohms Law ...... lol
not in my world they don't.
A rock that weighs the same as a feather would be known as a pebble, not a rock, so a feather will always fall slower than a rock even in a vacuum.
Now, if we were discussing pebbles and feathers.......
One question to the OP where are you getting your voltage reading from?
Is it from the inverter or are you checking the incoming supply when the PV is not producing?
03/04/13 | 19:20 | 10.457kWh | 2.614kWh/kW | 30W | 66W | 0.016kW/kW | 23.5C | 245.5V | - | - | |
03/04/13 | 19:10 | 10.446kWh | 2.612kWh/kW | 83W | 24W | 0.006kW/kW | 24.0C | 246.5V |
Im getting my readings from the inverter but the engineer tested the incoming supply with the house disconnected and was getting 246v when he put the supply back on and the inverter started generating again it was measuring grid at 246.5v
03/04/13 19:20 10.457kWh 2.614kWh/kW 30W 66W 0.016kW/kW 23.5C 245.5V - - 03/04/13 19:10 10.446kWh 2.612kWh/kW 83W 24W 0.006kW/kW 24.0C 246.5V
IMO, this needs to be repeated at say peak generation time to see what the actual grid voltage is then... before reconnection
At least now you know its a fairly accurate reading, what you need to know now is why is goes up so high at certain times/generation periods - is it your kit and/or surrounding environment ?
30/03/13 | 06:40 | 0.036kWh | 0.009kWh/kW | 137W | 126W | 0.032kW/kW | 10.4C | 250.5V | - | - |
thats interesting, 246V is fine, but voltage spikes of 250 is going some. The previous advice of asking others in the area if they get problems with bulbs blowing a lot might be a good idea. I wouldn't make too much fuss to the DNO about your PV system as they may blame that and tell you to switch it off! are there a lot of other PV systems in the area (sorry if this has already been asked)
ok, if thats on the same transformer that could push the voltage up
Re your high voltage; What size is the AC cable to the inverter and what is the length of it from inverter to where it is connected to your supply?
01/06/13 | 19:40 | 22.980kWh | 5.745kWh/kW | 353W | 672W | 0.168kW/kW | - | 243.6V | - | - | |
01/06/13 | 19:30 | 22.868kWh | 5.717kWh/kW | 746W | 498W | 0.124kW/kW | - | 250.0V | - | - |
Agreed - I have a Landis&Gyr E110 electricity meter an although it says "rEd" it does not add export to import (neither does it go backwards like the old mechanical meters).
By chance my solar array also happens to have a Landis&Gyr E110 to measure export.
As some people have suggested: perhaps the power generated by the solar is not being efficiently used ("use it or lose it"), but on the other hand some people with solar over-estimate how much it produces and switch everything on (sometimes in a wasteful way), resulting in a lot of power being imported from the grid because the power demands are so high that the solar can only provide a small portion of it.
At the moment, I'm generating about 0.6kW (3.7kW solar array) on a "white cloud" afternoon. My computer is running (0.2kW), the central heating is running (0.2kW for pump/fan etc), my wife is watching TV in the other room (0.2kW) so we're using all it's producing. We just boiled the kettle (3kW) so during that time we were still having to import 3kW of power for five minutes. Not to mention if we were running the washing machine, power tools/garden tools etc.
Reply to Something does not add up.. in the Solar PV Forum | Solar Panels Forum area at ElectriciansForums.net
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