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MPPT recomendations
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Quick math of Sunking's recommendation of 48v system 400ah bats looks like about $4K, I'm not sure how this helps when the budget is closer to $1100.. So, my idea at this point is try and find a midnite solar 150 for less than $500, buy 8 new batteries, wire the panels in 3S3P. Then stick with 24v until I have more money. Hopefully I can get 3 years out of the 24v system.Leave a comment:
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Can't find max Voc. on any of them.Leave a comment:
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Because Sunking... Someone sold me all this garbage as a kit, a guy in Phoenix. I had no idea what I was getting and trusted the dude.. ooops
But, in his defense his name was Budget and the price was right. I just had no idea that meant the whole thing would be toast in 6 months... again ooops
Next get rid of that nightmare foolish 9 panels in parallel to 3S3P arrangement.
As for batteries use 8 x 6-volt 400 to 500 AH batteries.Leave a comment:
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I have never heard of a Mablestar CC before. The pictures on the website does not give me a lot of confidence that it is an MPPT type.
I would be careful to determine if it is a true MPPT type CC before you purchase it.Leave a comment:
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Anyone used the Mablestar 80A MPPT from Amazon?Leave a comment:
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OK Suprasoup.. I'm obviously looking for the best controller at the best price.. Ebay has a few in the $200-$400 range. Anyone used the Mablestar from Amazon. I could afford that and it doesn't look like junk....
Find many great new & used options and get the best deals for MPPT 80a Solar Charge Controller 12v/24v/36/48v Auto Work 150v Heatsink Cooling at the best online prices at eBay! Free shipping for many products!
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Now that I read back my first statement is a bit confusing, unless you were reading my MIND as well. Oops! My bad.,
Thanks for the catch.Leave a comment:
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Voltage isn't what charges your batteries, current is. If you series wire your panels the voltage will increase but the current will remain the same. End result you wont get any more charging than you would from a single panel with a PWM controller. In the meantime you need to keep the panels in parallel. Once you get an MPPT controller , then series wire the panels.Last edited by littleharbor; 05-25-2018, 12:11 PM.Leave a comment:
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Last stupid question. If the 20v nominal panels are not supplying enough current to charge my batteries correctly, should the PWM CC be maxed out at 30V? I have to use what I've got until I can replace the batteries and get an MPPT CC. That could be a month or more. ThxLeave a comment:
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Because Sunking... Someone sold me all this garbage as a kit, a guy in Phoenix. I had no idea what I was getting and trusted the dude.. ooops
But, in his defense his name was Budget and the price was right. I just had no idea that meant the whole thing would be toast in 6 months... again ooops
Last edited by douglasjett; 05-23-2018, 11:28 AM.Leave a comment:
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Another person stuck inside a 12 volt toy box. Why are you using 24 volts? At 48 volt only requires a 40 amp controller saving you big bucks and uses much smaller wire saving you more money.
At 2000 watts requires roughly 800 AH battery and at 48 volts 400 AH battery.Last edited by Sunking; 05-23-2018, 09:38 AM.Leave a comment:
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Ditto on the 6V 208ah golf cart batteries. 4 in series gives you 24V @ 208ah. paralleled with another batch of 4 in series, doubles the amp hr to 416ah @ 24V $ 8x140 = $1120 Ouch. So no 48V inverter this year. So you need at least 40amps to charge that string, what does your existing controller put out to the batteries ?Leave a comment:
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