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Question [Solved] 12000xp PV input question

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 T345
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(@t345)
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Joined: 1 month ago

Hello,

am trying to wrap my head around this, my end goal is to have about 15-20kw of solar input for my 12000xp in series.
in the document it mentioned

  1. NUMBER OF MPPTS 2
  2. MAX. USABLE INPUT CURRENT 35A/35A
  3. DC INPUT VOLTAGE RANGE 100 – 480VDC

am interested on ordering few panels, i already purchased the inverter and 2 powerwall battery, the solar panels am interested on have the following specs . more info on  https://signaturesolar.com/philadelphia-solar-400w-bifacial-solar-panel-ps-m108-hcbf-400w/

  1. Wattage:400W
  2. VOC:37.15V
  3. ISC:13.55A

so base on my image, my assumptions are:

image

 

  • 1 and 2 is one MPPT, 3 and 4 is one MPPT. which total to 2MPPTs with a total of 4 string, correct?
  • each of the MPPT can have up to 35A of solar input, correct?
  • so the 480VDC total, does it meant that, each of the 4 string can have a maximum of 480vdc of solar input?

if my above assumption is correct then,i should be able to get around 16kw based on below.

MPPT 1

  • string 1 can have : 10 panels which will give me around 4000W @371.5vdc @13.55A
  • string 2 can have : 10 panels which will give me around 4000W @371.5vdc @13.55A

MPPT 2

  • string 3 can have : 10 panels which will give me around 4000W @371.5vdc @13.55A
  • string 4 can have : 10 panels which will give me around 4000W @371.5vdc @13.55A

Thanks in advanced for all your answers.

 

 

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Jared
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(@jared)
Joined: 2 months ago

Online Support
Posts: 187

Posted by: @t345

 

image

 

  • 1 and 2 is one MPPT, 3 and 4 is one MPPT. which total to 2MPPTs with a total of 4 string, correct?
  • each of the MPPT can have up to 35A of solar input, correct?
  • so the 480VDC total, does it meant that, each of the 4 string can have a maximum of 480vdc of solar input?

This would be correct. However, feel free to use the string size calculator shared by Joel.

 

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Joel Brodeur
Posts: 121
(@joel-brodeur)
Estimable Member
Joined: 2 months ago

I would suggest you run the number through the EG4 string calculator at:

SolarPanelApp

 

It will tell you if your proposed array works and how it should be hooked up.

 

Thanks,

JB

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