Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 07-26-2009, 04:21 PM   #1
Newbie
 
Join Date: Jul 2009
Posts: 4
Rewards Points: 0
Share |
Default

Solar Cell connection to grid


I am interested in building solar panels. I would like to connect them to my electric panel. I know when you run a generator you have to keep the generator power seperate from the line power. How can you connect the power from the solar cells to the panel. Will there not be a problem with power coming in from another source?

Thank for response,
Rox

Roxelectric is offline   Reply With Quote
Old 07-26-2009, 04:33 PM   #2
Member
 
Join Date: Jul 2008
Location: NW of D.C.
Posts: 5,990
Rewards Points: 0
Default

Solar Cell connection to grid


Line power = AC
solar panel power = DC
AC ≠ DC

Yoyizit is offline   Reply With Quote
Old 07-26-2009, 04:53 PM   #3
Newbie
 
Join Date: Jul 2009
Posts: 4
Rewards Points: 0
Default

Solar Cell connection to grid


[quote=Roxelectric;307033]I am interested in building solar panels. I would like to connect them to my electric panel. I know when you run a generator you have to keep the generator power seperate from the line power. How can you connect the power from the solar cells to the panel. Will there not be a problem with power coming in from another source?

Thank for response,
Rox
Roxelectric is offline   Reply With Quote
Old 07-26-2009, 04:56 PM   #4
Newbie
 
Join Date: Jul 2009
Posts: 4
Rewards Points: 0
Default

Solar Cell connection to grid


Solar panel would go through an inverter before going to the panel.
Rox
Roxelectric is offline   Reply With Quote
Old 07-26-2009, 04:56 PM   #5
Tool Geek
 
PaliBob's Avatar
 
Join Date: Jun 2008
Location: Pacific Palisades CA
Posts: 2,510
Rewards Points: 4
Default

Solar Cell connection to grid


Quote:
Originally Posted by Roxelectric View Post
...... How can you connect the power from the solar cells to the panel......Rox
In a lot of places, (e.g. here in LA) You can do it and feed the excess power back to the power grid (meter runs backwards) and get credit for it.

Complication, because of the interface requirements this is not a typical DIY project. Call your Power Co and ask them what's required.

Commercial companies are anxious to help
http://www.solardirect.com/pv/pv.htm
.
__________________
Disclaimer
& Stay Safe
.....Bob Lavery
PaliBob is offline   Reply With Quote
Old 07-26-2009, 05:07 PM   #6
Newbie
 
Join Date: Jul 2009
Posts: 4
Rewards Points: 0
Default

Solar Cell connection to grid


PaliBob,
Thanks for your response.
Rox
Roxelectric is offline   Reply With Quote
Old 07-26-2009, 05:31 PM   #7
Wire Chewer
 
Red Squirrel's Avatar
 
Join Date: Jun 2009
Location: Ontario, Canada
Posts: 3,211
Rewards Points: 0
Default

Solar Cell connection to grid


Like mentioned you'll want an inverter for this. You may also want to setup a battery bank as I'm not sure how good solar panels are current wise. Also to connect to the grid you'd need to somehow make sure the inverted AC phase is 100% in sync with the incoming power service. So lets assume you have 120v AC coming out of your inverter you'll want to connect the same poles together.
Red Squirrel is offline   Reply With Quote
Old 07-26-2009, 05:55 PM   #8
Member
 
Join Date: Sep 2008
Location: Oregon
Posts: 1,497
Rewards Points: 0
Default

Solar Cell connection to grid


This is called "Net Metering".

You would use a "Grid Tie Inverter".

Like these (Single Phase 60 Hz in U.S.)...
http://www.xantrex.com/web/id/13/type.asp
Billy_Bob is offline   Reply With Quote
Old 07-26-2009, 06:06 PM   #9
Idiot Emeritus
 
Join Date: Mar 2008
Location: Fernley, Nevada (near Reno)
Posts: 1,603
Rewards Points: 0
Default

Solar Cell connection to grid


Grid-interactive inverters are readily available. The DC side connects to the solar panels, and the AC side connects to the electrical panel. These are permanent connections.

When the solar panels receive enough sunlight to be effective, the inverter makes AC out of the DC, and synchronizes its output to the electrical panel. It then backfeeds everything the solar panels can produce into the grid. Most of them even adjust the DC input for the maximum solar panel efficiency. Typical DC voltages range from about 200 to about 600.

In the event of a grid power failure, the inverter automatically shuts down. Thus, no power is backfed into a dead power line. After grid power is restored, it'll wait about 5 minutes, then begin backfeeding again.

Most utilities require the inverters to be UL listed and IEEE 929 approved. I've yet to see a grid-interactive inverter that didn't meet both of these. They also require a lockable disconnect somewhere near their meter.

You'll need approval from the local utility for this type of installation. A solar system is a generating station, and each system must be commissioned by the serving utility. This is federal law, not state or local. Most utilities require a building permit for the installation. This can be a very simple process, or an absolute roadblock. Most larger building departments are well versed in these installations, and very easy to deal with. Some of the smaller ones haven't a clue, and are more obstructionist gestapos than anything else. Like the one where I live.

Ask your local utility about 'net metering'. This is where your system basically turns your meter backward when its generating, and the meter turns forward at night. Most utilities have such a program, but it varies state to state. Some states offer rebates based on the actual output of the system.

Rob
micromind is offline   Reply With Quote
Old 07-27-2009, 05:04 PM   #10
WFO
Member
 
Join Date: Nov 2008
Posts: 89
Rewards Points: 0
Default

Solar Cell connection to grid


Quote:
Originally Posted by micromind View Post

Most utilities require the inverters to be UL listed and IEEE 929 approved. I've yet to see a grid-interactive inverter that didn't meet both of these. They also require a lockable disconnect somewhere near their meter.


Rob
I believe the way the law is worded, if the inverter is UL listed, the Utility cannot require an engineering analysis of the unit.....it is assumed to meet all requirements. If you put the system together yourself, the Utility can rightly require you to prove that it will meet all the standards on islanding, frequency, overload protection, harmonic distortion, etc.

WFO is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
closed cell vs open cell foam insulation amonalisa Building & Construction 1 11-06-2008 09:39 PM
Solar Charged Brushless Lawn Mower Educator Electrical 2 04-20-2008 12:43 PM
solar cell neslaf Electrical 3 12-10-2006 10:51 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.