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-   -   Grid Tie Solar Panel Manual Transfer Switch Possible? (http://www.diychatroom.com/f18/grid-tie-solar-panel-manual-transfer-switch-possible-73900/)

tomguy 06-16-2010 06:05 PM

Grid Tie Solar Panel Manual Transfer Switch Possible?
 
I have a Grid Tied Solar Panel on my house. I am thinking that in an event of a power outage or disaster, my solar panels are pretty much useless if there is no grid power coming into the house. Would it be possible to hook up a manual transfer switch to the inverter so that it would cut the grid connection and run the power for the times the house has sunlight? I know the grid tie inverter requires a voltage detection to run due to safety, but I was also thinking if I could tie that in to a portable generator to power the inverter.

Is something like this possible and if so how can I achieve it?

Thanks

Yoyizit 06-16-2010 08:34 PM

Quote:

Originally Posted by tomguy (Post 457281)
I have a Grid Tied Solar Panel on my house. I am thinking that in an event of a power outage or disaster, my solar panels are pretty much useless if there is no grid power coming into the house. Would it be possible to hook up a manual transfer switch to the inverter so that it would cut the grid connection and run the power for the times the house has sunlight? I know the grid tie inverter requires a voltage detection to run due to safety, but I was also thinking if I could tie that in to a portable generator to power the inverter.

Is something like this possible and if so how can I achieve it?

Thanks

The system I saw was pretty complex due to failsafes and various time delays.

Is it

IF no PoCo
THEN
disconnect PoCo
AND
run house on solar.

Also,
IF
no solar
AND
no PoCo
THEN
run house on generator

?

LyonsElecSupply 06-16-2010 10:46 PM

Im with YoY....These systems are very complex and such....There are quite a few ways to destroy sensitive equipment here man.....Better spend the cash and get it done right.

tomguy 06-19-2010 12:49 AM

First of all, does a system exist? I'm just looking for something that will automatically disconnect the PoCo and then run off the solar power. I don't care about having power at night, but at least when the solar is functional I would like to get some electricity into the house.

Any ideas? I don't need to have a battery backup since I wouldn't care about having it run at night.

THanks

Yoyizit 06-19-2010 12:38 PM

Quote:

Originally Posted by tomguy (Post 458428)
that will automatically disconnect the PoCo and then run off the solar power.
when the solar is functional I would like to get some electricity into the house.

Any ideas? I don't need to have a battery backup since I wouldn't care about having it run at night.

That should be easy.

When the panels produce enough voltage from the inverter the setup drives a large relay that switches the house from the PoCo to solar.
For temporary cloudiness, though, without a battery, the unit might then switch back to PoCo. This kind of cycling is probably undesirable.

goacom 04-08-2011 04:55 PM

tomguy,
I was wondering if you were able to make any progress on this front. I have a grid tied system and yes, if the grid were to die, my panels would be useless. I'm looking for a way to power my solar panel inverters in the event of a power failure. I thought there may be an option for powering the inverters with a small generator.


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