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Post by Jimmy on Oct 5, 2017 13:44:36 GMT -8
I bought 800 watts of solar panels and a 40 watt mppt controller from you. Can I tie another 40 watt controller in and add 600 more watts of panels? I cant pay the cost of a 60 watt mppt controller.
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Post by tattoo on Oct 5, 2017 14:50:53 GMT -8
Let me get you right.... You are running 800w of panels off of a 40w CC?  And you want to add 600 more watts for a total of 1400w and want to add just another 40w CC? Is it working at all??? |
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Post by rabird on Oct 5, 2017 15:50:31 GMT -8
You can certainly run 2 charge controller to a battery bank, each is wired separately to the battery bank!
Are these 100 watt panels? how do you plan to connect them cuz if you connect 8x 100watt panels in series you will likely exceed the input voltage limit of the controller and that leads to which 40A controller, like they are all the same or something - but i don't care to find the specs of your unknown controller.
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Post by Jimmy on Oct 14, 2017 8:02:37 GMT -8
Having trouble getting answers from renogy. Can I run 1400 or 1600 watts in series parallel with Renogys 60 amp mppt controller to a 24 volt battery bank. What inline fuse would I use. I suspect the 15 amp.
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Post by Jimmy on Oct 14, 2017 8:04:41 GMT -8
What size fuse would I use between 1500 watt inverter and a 24volt battery bank? I am using 4awg wire. Does it matter how many panels I have connected to the charge controller?
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Post by rabird on Oct 14, 2017 10:10:40 GMT -8
there is a limit, one limit is based on voltage limit imput of the controller, got a link to the manual and specs.
the other is power input limit but often they can be over powered and the controller clips excess. When ya ask how many panels, what are their specs? are they 72v panles? are they 12v panels? The manual may have all this info in it but who knows what controller you have or are talking about. ? ? ?
What inverter, link, manual. is it a 24v inverter? if it is a 1500/3000w peak you'd wire for the 3000w. How many amps is 3000w at 24v? or you can fuse for the 4 gauge wire size. IIRC 4 gauge calls for 125A fuse. gee 3000w/24v = 125A
I think page 10 of the controller manual has some good info as well at the top of 11
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Post by tattoo on Oct 14, 2017 13:41:04 GMT -8
Bird, Don't you just love when you get part of the story? I'd like to know how many batteries and at what volts are in his 24v bank? ? Where is Karnack when you need him........... |
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Post by rabird on Oct 14, 2017 16:21:59 GMT -8
tat, some folks will drink when led to water, I once posted that 10 x 10watt 12v panels in series has a Voc of over 200v. That might exceed a 150v limit, I'm not sure if 200v is greater than 150v. 10x10w = 100 watt! so it matters.
now 5 x 150v 12v panels would be have a Voc in series of 5x~22v or 110v. Again I'm not sure which is greater 110v, 150v, or 200v.
let's see 24v 60 cell panels have a voc of 34? three in series would be ~100v, they could be as small as 160w to 300w or larger!
It is common to ask the wrong question and that leads to answers that do not address the original question! so what!
others tag onto an existing thread with a different topic! not my forum but the owner is poor and non responsive, and why I have no problem recommending other's products, like the bluethooth grape solar 40A from home depot!!!! Gee it made by the same folks renogy gets some of their controllers from.
give me a accurate watch and I'll tell ya the time.
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Post by tattoo on Oct 15, 2017 5:35:15 GMT -8
tat, and why I have no problem recommending other's products, like the bluethooth grape solar 40A from home depot!!!! Gee it made by the same folks renogy gets some of their controllers from. Bird, Have you looked at solar prices on the Home Depot web site lately? Man have they really gone up in the last year...... I guess there are a lot of people that are interested in solar..... |
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Post by rabird on Oct 15, 2017 7:28:24 GMT -8
yep, my 40A BT controller has gone from $49 to $56 100 watt panels still $99 delivered free with 90 day local return policy! I find it amusing that Renogy offered the same controller, 30A no BT but in their software section they have the software APP. I've emailed a dozen times which controller works with the android app, they even have an ios wherever one gets ios apps. I talked my brother in the the 40A BT and he got the ios online and working. ios app itunes.apple.com/us/app/renogy-bt/id1251320287?mt=8 called RenogyBT, what's it for? older android play.google.com/store/apps/details?id=com.shuorigf&hl=enbest to get updated from grape support email. |
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Post by Jimmy on Oct 16, 2017 12:49:17 GMT -8
Hey, thanks for the comments. Sorry I left out so much information. I have 2 batteries Walmart 29 max wired equaling 24 volts. Ive had my 800 watts of 100 watt panels with renogys old polar solar mppt 40 amp controller for 2 years now, no problems. I have a 1500 watt aims pure sinewave. This system was great during the hurricane. Renogy says I cannot tie another 40 amp mppt controller to my battery bank and add 8 more 100 watt panels. They said I could purchase the 60 mppt commander controller and add up to a total of 15 or 16 but not 14 100 watt panels. I am going with the 15 total panels.
Problem is during the day I run everything in the house with the 800 watts except the window ac. It draws 900 watts. The toaster oven and dishwasher each take 1100 watts. During the day it blinks away with the frig ceiling fans tv lights and computer running. I want to get the rest of the stuff. I know not at the same time. Is it true the plugin inverters are only a myth?
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Post by tattoo on Oct 16, 2017 14:11:11 GMT -8
Jimmy, Let me get this right.. You have 8 100w panels going to a 40a charge controller and just 2 12v batteries wired to 24v right? If that's right your system is the way to go....
Also are you panels in series?
Oh yea I have another question.... When it's charging during the day how many volts are coming into your CC?
What is the temperature of your CC during the day?
The reason I'm asking is I have the same CC as you and only 5 panels.... I've been told that 100v max is all I can have with my CC.... And I can't do what you can do with 6, 6v batteries....
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Post by tattoo on Oct 16, 2017 18:18:07 GMT -8
Bird, do you have a thought on how he is able to run 8 panels with a 40a CC? It's got me puzzled...........
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Post by rabird on Oct 17, 2017 6:05:33 GMT -8
ain't the limit ~500w for 12v and 1000w for 24v? and then there is clipping by the controller.
they can't all be parallel cuz its 24v. They should not all be in series cuz Voc. What's the input limit?
What's wrong with having 2 chargers?
Is it true the plugin inverters are only a myth? IDK
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Post by tattoo on Oct 17, 2017 10:12:40 GMT -8
ain't the limit ~500w for 12v and 1000w for 24v? and then there is clipping by the controller. they can't all be parallel cuz its 24v. They should not all be in series cuz Voc. What's the input limit? What's wrong with having 2 chargers? Ok Bird now I understand.......... I didn't think about it being 24v and it being different. I told you I was still learning this stuff............ It sounds like 24v is the way to go next time....... Yea what's wrong with two CC? Also Jimmy how does your system do at night with just two batteries??? What can you run and not kill your batteries? |
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And you want to add 600 more watts for a total of 1400w and want to add just another 40w CC?