animalfarm
Power Conserver
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- Jan 20, 2011
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I AM NOT net metering (feeding into the grid to save for later) I am only taking from the grid if I need extra. I do have a master switch on the outside of the house so that if I were to do net metering, hydro personel could shut off the power coming from my house but at that point it is very unlikely that there would be any excess power going back to the grid. This stuff is pretty much all automatic since one could not guarantee they would be home when the power went off.Nifty said:Interesting! What is the make / model of your inverter?
Not sure if you are asking me, so apologies if you are not.
Xantrex inverter.
One thing I'm still not wrapping my head around with your setup: If the grid goes down in the middle of the day, are your solar panels still providing power to the inverter and then to the house? Does your system auto-disconnect from the grid before kicking on?
If the grid goes down, solar and/or wind are still charging the batteries. I don't even know the grid is down which is why I must know what my load is at all times. (inverter can only handle <6000 kw at a time and it is best to stay under 5000 kw) Also the higher the load, the quicker the batteries drain if the grid is down, so ideally it is best to maintain under 2000 kw load.
We are grid tied only because propane for generator is more expensive the electricity and we have to learn and fine tune the system before going off grid completely.
The inverter takes DC power from the batteries and converts it to AC for the house. That is all it does. There is a little control box attached, like a thermostat control for your heater, which lets you program what you want your system to do, but it is not the inverter itself which does this.
My buddy works for PG&E (utility out here) and said that they require that inverters shut off when the grid is down because they don't want 4 Kw + being fed into the grid when their guys are up working on the lines that are suppose to be "dead".
So, I'm guessing any system that is grid tied and has batteries, etc. would legally have to disconnect from the grid if the grid goes down to protect the linemen.
There is a switch in my breaker box which lets me go from straight hydro to hybrid/off grid or vice/versa. All very easy.