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Furstrated- Unable to get rated solar Amperage
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Sorry for the delayed update. I had a heated talk with the Dealer and He is finally giving me MPPT. He already tried various PWM and max i got was 550W out of a 1000W worth of 4 Panels.
The MPPT he's giving me is-
Problem is, the model is rated only upto 20A. 40A model is not available.
Is it okay to use two MPPT in parallel to generate 40A for batteries? (By putting 2 panels per controller)
However this MPPT is on Non-refundable basis, so if I get less output, damage is mine. What ya say folks? Jump the gun?Comment
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I know nothing about the quality of the controllers you mention, but given that your installer has proven himself to be unqualified, why do you trust him to sell you a controller that he has never used or installed?
--mapmakerob 3524, FM60, ePanel, 4 L16, 4 x 235 watt panelsComment
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Yes, you can use 2 controllers on the same battery. Each controller will need its own array... that means each array will need its own cable to its own controller.
I know nothing about the quality of the controllers you mention, but given that your installer has proven himself to be unqualified, why do you trust him to sell you a controller that he has never used or installed?
--mapmaker
as I have paid advance cash for lump sum project to him, I will be for a loss if I leave him. that's why it's mandatory to get the project done from said person.
that aside ,reading the pdf spec and manual makes me feel that these are absolute high end controllers one can have in India. actually it's me who found these controllers but he will be buying them on my behalf.
I will report back once they land up here. thanksComment
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Same holds for MPPT. I could design a system where the PWM would be more efficient than the MPPT.
--mapmakerob 3524, FM60, ePanel, 4 L16, 4 x 235 watt panelsComment
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bad news
I bring in a Bit of bad news folks,
One of the Battery in the system seems to be giving up.
Battery-
Flood Lead Acid Tubular Deep cycle (exide branded)
12v Nominal
165 AH
Of late the battery feels hot to touch. Assuming ambient near 35.C, be battery temperature stays around 42~43.C Irrespective of Charge or Floating voltage or Discharging load. Similar battries in other units do no exhibit such behaviour.
What could be the issue? Why is Battery heating up?
P.s- My Clamp meter says that battery is continuously eating about 6 amps from neighboring batteries or charger.Comment
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I bring in a Bit of bad news folks,
One of the Battery in the system seems to be giving up.
Battery-
Flood Lead Acid Tubular Deep cycle (exide branded)
12v Nominal
165 AH
Of late the battery feels hot to touch. Assuming ambient near 35.C, be battery temperature stays around 42~43.C Irrespective of Charge or Floating voltage or Discharging load. Similar battries in other units do no exhibit such behaviour.
What could be the issue? Why is Battery heating up?
P.s- My Clamp meter says that battery is continuously eating about 6 amps from neighboring batteries or charger.
--mapmakerob 3524, FM60, ePanel, 4 L16, 4 x 235 watt panelsComment
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Thanks for the blazing fast reply. I have removed the battery promptly. It appears to be around 50.C. even after removal.
As an upgrade, I am thinking to Parallel 2x 150AH batteries for total 300AH.
How many batteries can be charged using a 20A MPPT charge controller? One? two?
Some people say single battery should not be charged more than 10A? How true is that?
Reason is, The new MPPT charge controller is only rated at 20A. I am thinking to get 2 Charge controllers, and Hooking each one to its own battery system. The batteries will be finally paralleled before sending to the inverter.
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I have 2 batteries in my 24v system 150AH
and Single battery in a separate 12v system 165AH
Both the Systems are in the que for MPPT charge controller upgrade. The MPPT in question is auto select 12 or 24v, with 4 stage temperature compensated charging but rated at only 20A.Comment
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Previously you wrote:
Originally posted by bhvmMy Clamp meter says that battery is continuously eating about 6 amps from neighboring batteries or charger.
--mapmakerob 3524, FM60, ePanel, 4 L16, 4 x 235 watt panelsComment
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1) I tried shufling the battery to troubleshoot any issue with chargers or Location, But the battery stays hot even after shuffling. As a result i have marked it as bad battery
2)My batteries are Flooded lead acid, tall Tublar ones. AGMs do not suceed in India due to Heavy heat and poor power conditions.
3) I have placed order for amaron 150AH x 2 Tall tublar units. As a result I won't be mixing new and old battery.Comment
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Sorry to tell you the MPPT charge controller you listed won't work with your system. The maximum input voltage is 70volts and one of your panel VOC is 36volt which will be 72 volt when you put them in series. So that is no no. hope you didn't buy them yet.Comment
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