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Post by classhd on Nov 26, 2017 6:42:00 GMT -8
Hi!
My system now:
1) 2 Renogy Monocrystalline 100w solar panels
2) Renogy Wanderer - 30A PWM Charge Controller
3) UB121000 100ah battery
4) Wagan ELITE™ 400W Pro Pure Sine
Questions:
1) Wich wire gauge from solar panel to controller?
- actually I'm using
those who came with the
starter kit the.
2) Wich wire gauge from controller to battery/battery bank?
- actually I have only
one 100ah battery but I
bought another one
cause I read I can
connect it to the old
one before 3 months of
use.
- When the new one
arrives, wich wire
gauge to make a
parallel connection
between batteries?
3) Wich wire gauge from battery/battery bank to power inverter?
- actually I'm using
those who came with the
power inverter without
the alligator clips.
Thanks in advance
Please help a newbie without no much solar knowledge)
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Post by rabird on Nov 26, 2017 7:31:15 GMT -8
10g panel to controller, limited length 30'
10g controller to batt,, keep short.
8g short wires batt to inverter and batt interconnect.
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Post by tattoo on Nov 26, 2017 7:31:47 GMT -8
1 those wires will be just fine..
2 at least #4 wire or what ever is largest that will fit in your CC..
3 #4 wire if it will work with the inverter.
4 #4 from battery to battery..
Bird here is a chance for you to post a graph...
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Post by classhd on Nov 26, 2017 7:41:54 GMT -8
Thanks for your quick response. I would like to see the graph.
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Post by tattoo on Nov 26, 2017 9:13:39 GMT -8
Thanks for your quick response. I would like to see the graph. LOL You'll get to see one I'm sure.... I can't believe he isn't posting them much lately.. |
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Post by classhd on Nov 26, 2017 17:58:57 GMT -8
1 those wires will be just fine.. 2 at least #4 wire or what ever is largest that will fit in your CC.. 3 #4 wire if it will work with the inverter. 4 #4 from battery to battery.. Bird here is a chance for you to post a graph... Why rabird recommend 8awg for battery interconnect and from battery bank to inverter and you recommend 4awg? |
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Post by classhd on Nov 26, 2017 18:29:45 GMT -8
rabird tattooIf I take a decision by letting myself be guided by what you recommend, I would opt for: Panel to CC = those who came with the starter kit, Renogy 10awg 20 feet. CC to battery bank = those who came with the starter kit, Renogy 10awg 8 feet. Battery interconnect = 4awg Battery bank to inverter = 8awg In fact I'm thinking to use the type of cable that electricians use when make a home installation. I will not use the welded wire that is used for sound equipment installations in cars. What do you think? I want a trust installation, I don't want to make a fire in my home lol... I depend on your answer, tomorrow I will make the purchase of the wires and copper terminals.
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Post by tattoo on Nov 26, 2017 18:48:36 GMT -8
1 those wires will be just fine.. 2 at least #4 wire or what ever is largest that will fit in your CC.. 3 #4 wire if it will work with the inverter. 4 #4 from battery to battery.. Bird here is a chance for you to post a graph... Why rabird recommend 8awg for battery interconnect and from battery bank to inverter and you recommend 4awg? Did you read all of what I said did you stop with the first two words?? I also said what ever would be the largest wire that would fit.. Bird is correct but the bigger the wire the better.. |
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Post by tattoo on Nov 26, 2017 18:55:22 GMT -8
rabird tattoo If I take a decision by letting myself be guided by what you recommend, I would opt for: Panel to CC = those who came with the starter kit, Renogy 10awg 20 feet. CC to battery bank = those who came with the starter kit, Renogy 10awg 8 feet. Battery interconnect = 4awg Battery bank to inverter = 8awg In fact I'm thinking to use the type of cable that electricians use when make a home installation. I will not use the welded wire that is used for sound equipment installations in cars. What do you think? I want a trust installation, I don't want to make a fire in my home lol... I depend on your answer, tomorrow I will make the purchase of the wires and copper terminals. Yes everything above will work great all but the cable you mentioned I'm not familiar with it.. Bird might know of it?? You shouldn't have any problems... Be sure you use fuses and main shutoffs in every run.. a total of 3 shutoffs and 3 fuses... |
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Post by classhd on Nov 27, 2017 2:19:51 GMT -8
tattooCan you give me an example or a link to view/buy the fuses and shutoff?
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Post by tattoo on Nov 27, 2017 5:23:27 GMT -8
tattoo Can you give me an example or a link to view/buy the fuses and shutoff? Sorry I don't have a link but I used the inline fuses like Renogy sells.. You can get them on line or a high end radio supply or local box store. On the shut off I bought them at Cabelas they are for a boat the ones I bought are red.. Hope this helps |
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Post by rabird on Nov 27, 2017 5:24:39 GMT -8
Panel to controller, panels come with 10g and that is generally OK, panel generally has extra voltage with PWM controller. controller to battery, short and big for the amount of current. 8' of 10g @8 amps is ~1% loss, acceptable, bigger would be better 8g is good for 50 amps so that is minimal for 400w inverter if very short, your load is <200 watts IIRC. If the system does not change then 8g interconnect, again very short will handle 50A. going bigger on both is a plus, premade versions are 4g or bigger www.renogy.com/renogy-battery-interconnect-cables/Connections and wire terminations are critical, clean and tight. another source of resistance like small long wire. If ya add cut offs and/or fuse/circuit breakers these connection are just as important, no help from me on locating these. wire size chart bdfuses.com/fusesnwires.phpif ya look at that chart, 8g max 50A, if ya keep it short then you limit the voltage drop, staying short and going with the next size is a plus. One foot of 8g @ 40A is .5v loss or ~0.5% loss. Know nothing about the wire you mentioned. |
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Post by tattoo on Nov 27, 2017 5:29:10 GMT -8
Like Bird said above... Also on the wire, since he doesn't know about the wire you want to use either I would go to a battery store or a place that sells copper braided wire..
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Post by rabird on Nov 27, 2017 10:34:43 GMT -8
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Post by tattoo on Nov 27, 2017 12:46:11 GMT -8
^^^ Yes sir if he's talking about romex or 12 2 with a ground damn right that's to small... I wouldn't use anything smaller than #4 from battery to battery and at least a #6 from the batteries to the inverter but #4 would be much better...
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