Energy Options > Solar Power

Small Project need help

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Johnny MAX!:
I will check out the battery site Thnx.
Anybody know what type of charge comtroller I need for the batteies. I heard Jack mention on the show how important they are, but I have not found any information on exactly what I need, or where to find one.

Pathfinder:

--- Quote from: Johnny MAX! on June 17, 2009, 07:35:26 PM ---I will check out the battery site Thnx.
Anybody know what type of charge comtroller I need for the batteies. I heard Jack mention on the show how important they are, but I have not found any information on exactly what I need, or where to find one.

--- End quote ---

The controller regulates the current to the batteries, so you need one capable of handling the current from the solar panel to the batteries. If you have a 1.2A panel like the Coleman 18W one I have, then you need a controller that can handle at least 1.2A, preferably more for a safety factor. The Coleman controller I bought with the panel can handle 4A, meaning I can link 3 panels through the one controller (3 panels x 1.2A per panel = 3.6A). 4A gives a 10% safety margin for this controller.

Bigger amperage panels, or more panels per controller, requires a bigger controller. And get a spare too.

Good luck with the project.

Mr. Blank:
Johhny,
Sorry to leave you hanging so long on this one. :) The meter that you have is a great start. The first thing you should do is measure the draw that your appliances is pulling, in AMPS. The reading the meter will give you will be the AC draw of the appliances. DO NOT confuse this with the amount of DC power that they will draw. The DC draw will be approximately 10 times what the AC draw is. I know this sounds crazy, but it is true.
Think of it this way...

110 volt pulling 2 amps = 220 watts
12 volts pulling 2 amps = 24 watts

Do you see a BIG difference in the amount of total watts being used?

12 volts pulling 20 amps = 240 watts. Looks a little closer to the AC draw.

Did I confuse you? Hope not. Just think of the appliances using 'X' amount of energy, be it AC or DC, that 'X' will be an approximate amount of watts.
If it takes 220 watts of AC to run it, and it was drawing 24 watts of DC, where does the extra energy come from? :P

So why am I confusing you with all this crap? You will need a rough estimate of how much DC wattage you will be pulling to know which batteries to start with.

What is your rough budget for this project? Let me know and I'll try to get you some sources for parts. :)

Johnny MAX!:
I think I know how to step into this one Purchase at a time.
I am going to buy One battery and the inverter and get it working and time how long the battery will last, then order twice the batteries I calculate to run for 24 hours.
Next step, the solar panels and charge regulator.

I am going to do all of this off the radar and not take a penny from the gubment.
I don't want them to one day tax me for having solar, TRUST ME it WILL Happen!
Let me see, you are evading the taxes we have added on th eutility bill, so we will tax you r solar energy intake, or it damages the environment to produce solar panels so you will be taxed, or what ever bull crap they can conjure up.

If the gubment can give money to GM and then fire people and then tell them what they can and cannot do, they have set a precidence. so if you take money from them they can tell you what you can and cannot do in your homestead! I better stop, this is the wrong board....
I don't wan't a damn penny from them. I will work to support my family!.... I better stop, the homebrew is kicking in....

danielle89506:
Hey Johnny Max get in touch with the guy we used he really is an off-grid specialist, he has quite a reputation for over the top service design and support  people say here he is one of the best designers of alt-energy on the West coast.

We ended up going with his recommendation of  a dc/frig and freezer no inverter or batteries needed.

He also has right now a good used Xantrex 5500watt sinewave inverter power panel for sale if you were set on getting started on a system.

his site Universalenergyonline.biz

cheers

Dani

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