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Post by blade3609 on Nov 2, 2018 21:29:07 GMT
Here's a pic for 2 12's. I used 1/0 welding cable for all my battery interconnects and to the first fuse for pos & bus bar for neg. If you use a fine cable like that don't solder the lug on or you'll end up with a thick copper bar What lengths do you have?
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Post by blade3609 on Nov 2, 2018 21:47:41 GMT
What do you guys think ? is it ok to use 3/8 cable lugs on 5/16 bolt?
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Post by tattoo on Nov 2, 2018 23:06:17 GMT
What do you guys think ? is it ok to use 3/8 cable lugs on 5/16 bolt? It won't hurt a thing, it's not recommended but it should be just fine..... be sure and use a washer...
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v10
Solar Advocate
Posts: 81
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Post by v10 on Nov 3, 2018 0:46:50 GMT
Welding cable can often be found for sale on craiglist type sites for a fraction of the regular price.
It's extremely easy to work with and very durable.
The strands are very fine and there many of them in there so its a good idea to clean them well and solder before crimping
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Post by playersz28 on Nov 3, 2018 13:00:50 GMT
Here's a pic for 2 12's. I used 1/0 welding cable for all my battery interconnects and to the first fuse for pos & bus bar for neg. If you use a fine cable like that don't solder the lug on or you'll end up with a thick copper bar What lengths do you have? Fairly short. All in fifth wheel front bay. Tracer changed to Rover now. Attachments:
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Post by tattoo on Nov 3, 2018 13:10:05 GMT
^^^^ That is an awesome, very clean looking setup...^^^^
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Post by playersz28 on Nov 3, 2018 13:42:23 GMT
^^^^ That is an awesome, very clean looking setup...^^^^ Thanks. It'll need redoing next summer as I keep adding things in. There's now a DROK shunt in there and I need to fit in another Arduino board.
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Post by tattoo on Nov 3, 2018 15:05:56 GMT
Thanks. It'll need redoing next summer as I keep adding things in. There's now a DROK shunt in there and I need to fit in another Arduino board. Isn't it astounding that when you first get started with solar how fast you start expanding it? When I first got started I did research about solar for 2 months before I bought anything hoping to just buy what I needed only one time..... It didn't take long before I was expanding it.... Don't get me wrong it worked good but I really had to watch my usage... So bigger it had to be....
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Post by blade3609 on Nov 5, 2018 2:44:00 GMT
Thanks. It'll need redoing next summer as I keep adding things in. There's now a DROK shunt in there and I need to fit in another Arduino board. Isn't it astounding that when you first get started with solar how fast you start expanding it? When I first got started I did research about solar for 2 months before I bought anything hoping to just buy what I needed only one time..... It didn't take long before I was expanding it.... Don't get me wrong it worked good but I really had to watch my usage... So bigger it had to be.... I had the exact same experience!
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Post by blade3609 on Nov 5, 2018 19:43:21 GMT
Speaking of expanding..., i was thinking the following.
My max panel power per day according to the graphs ive seen thus far is 350 watts or less, and i have 4x 100watts = 400watt of panels. The rover 40A has a max of 550 watts input from panels at 12V.
Can I add 2 more panels making it 600watts? because due to losses and my angle the max the rover would see is probably less than 600, making it fit in the 550 max. What are your thoughts?
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Post by tattoo on Nov 5, 2018 20:40:32 GMT
Speaking of expanding..., i was thinking the following. My max panel power per day according to the graphs ive seen thus far is 350 watts or less, and i have 4x 100watts = 400watt of panels. The rover 40A has a max of 550 watts input from panels at 12V. Can I add 2 more panels making it 600watts? because due to losses and my angle the max the rover would see is probably less than 600, making it fit in the 550 max. What are your thoughts? Yes sir you can add 2 more panels with no problems at all.... That's exactly what I did in the beginning...
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Post by blade3609 on Nov 5, 2018 20:45:39 GMT
Speaking of expanding..., i was thinking the following. My max panel power per day according to the graphs ive seen thus far is 350 watts or less, and i have 4x 100watts = 400watt of panels. The rover 40A has a max of 550 watts input from panels at 12V. Can I add 2 more panels making it 600watts? because due to losses and my angle the max the rover would see is probably less than 600, making it fit in the 550 max. What are your thoughts? Yes sir you can add 2 more panels with no problems at all.... That's exactly what I did in the beginning... Perfect, how did you connect them ? 3x panels in series, and paralleling the 2 strings of 3x panels?
The losses are a damn lot. What did you get max with 4 panels? and with 6 panels?
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Post by tattoo on Nov 5, 2018 21:10:09 GMT
Perfect, how did you connect them ? 3x panels in series, and paralleling the 2 strings of 3x panels?
The losses are a damn lot. What did you get max with 4 panels? and with 6 panels?
LOL Man I don't remember the numbers that was 2 years ago.... I did have all 6 panels in series but that was in the Winter.... Then about 6 months later I went to the 8 panels I have now 4 and 2 sets in parallel..... And yes that was with my 40a CC.... Then I changed to my 60a CC I have now....
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Post by blade3609 on Nov 5, 2018 21:13:19 GMT
Perfect, how did you connect them ? 3x panels in series, and paralleling the 2 strings of 3x panels?
The losses are a damn lot. What did you get max with 4 panels? and with 6 panels?
LOL Man I don't remember the numbers that was 2 years ago.... I did have all 6 panels in series but that was in the Winter.... Then about 6 months later I went to the 8 panels I have now 4 and 2 sets in parallel..... And yes that was with my 40a CC.... Then I changed to my 60a CC I have now.... Waw, you are in this solar world a while now. whats the max power you've seen with your 8 panels? each 100 watts right? something around 700?
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Post by bupkis on Nov 5, 2018 21:21:52 GMT
most mppt controllers can be over 'loaded' to some extent, "The controller will limit the battery charging current to the maximum battery current rating. Therefore, an over-sized solar array will not operate at peak power.'
In extreme cold (do you ever get that!!!) and very low battery voltage one could see over 40A.
I'd stay with series pairs, more eff transforming 35v to 14 than 52v to 14, but do consider the voltage drop, if you add another pair the amps go up, if ya keep to 2 strings then the amps stays the same but the voltage goes up.
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