Daddy's Barn [Outback FlexPower One (VFXR3524A-01) Battle Born BBGC2H]

[31ectr0nicb0b]

My kids and I are building a barn since the pandemic and its at a stage where its ready for some power. I'll be getting a standing seam metal roof installed soon so I need to address the PV DC input and array size.

I am planning on doing a series-parallel connection for [4] 24V banks with 100Ah capacity each using the batteries listed below. This should equate to [4] 24V banks with 400Ah total.

This is what I have so far (everything comes bundled and mounted as seen in pic above):

• [8] Battle Born 12V 100Ah BBGC2H
  • I am in the middle of charging all of them via the Victron charger below
  • https://battlebornbatteries.com/product/12v-gc2-lifepo4-heated-battery-kit/
• Victron IP65 15A charger
  • https://www.victronenergy.com/chargers/blue-smart-ip65-charger
  • https://www.amazon.com/gp/product/B07DWJD84N/ref=ox_sc_act_title_1?smid=ALRPFGEN62HZC&psc=1
• Midnite MNPVHV8-DLTL NEMA 4X-PSB Disconnecting Combiner
  • The MNPV8HV-DLTL allows you to take 4 strings in and combine them into 2 strings out. Strings 1 and 2 go
    to channel A out and Strings 3 and 4 go to channel B, allowing for two MPPT channels out to a transformerless
    inverter.
  • https://www.midnitesolar.com/documents.php?productCat_ID=26&model=MNPV8HV-DLTL 4X&product_ID=573&act=
  • https://www.midnitesolar.com/pdfs/10-065-1_REV_M_Combiner_Manual_10-16-19.pdf
  • https://www.invertersupply.com/index.php?main_page=product_info&products_id=200189
• Midnite Rapid Shutdown Power Supply Board MNDISCOPSB
  • https://www.midnitesolar.com/pdfs/10-219-1_REV_E_MNDISCOPSB_Installation.pdf
• [Placeholder] Midnite Birdhouse
  • 
    
  • https://www.midnitesolar.com/pdfs/MNBirdHouse-REVA.pdf
• [2] Surge Protection Device MNSPD600
  • https://www.midnitesolar.com/productPhoto.php?product_ID=285&productCat_ID=23&sortOrder=3
  • https://www.midnitesolar.com/pdfs/SPD_Installation_Manual.pdf
  • https://www.midnitesolar.com/pdfs/howLightningProtectionWorks.pdf

• Outback FlexPower one FXR
  • VFXR3524A-01
  • https://www.outbackpower.com/products/integrated-systems/flexpower-one-fxr
  • https://www.outbackpower.com/downlo...expower_one_fxr/flexpoweronefxr_datasheet.pdf
• FlexMax 80 Charge Controller
  • https://www.outbackpower.com/downlo...controllers/flexmax_6080/fm6080_datasheet.pdf
• Mate 3s System Display and Controller
  • https://www.outbackpower.com/products/system-management/mate3s
• FlexNet DC Battery Monitor
  • https://www.outbackpower.com/downloads/documents/system_management/flexnet_dc/user_guide.pdf
• HUB Communications Manager
  • https://www.outbackpower.com/products/system-management/hub
• [Placeholder] Lacking PV array
• [Placeholder] Lacking PVRSS PV Rapid Shutdown System

This is a link to a quick start guide of the entire system:

• https://www.outbackpower.com/downloads/documents/integrated_systems/flexpower_one_fxr/fp1_qsg_na.pdf

 

[31ectr0nicb0b]

My main questions:

• What is the best way to wire the series-parallel using the shortest cabling as possible for the batteries above?
  • Will attach image of my drawing soon
• Need help identifying PV array size
  • Will attach image of how I calculate the PV array size and hopefully someone will throw stones at it
• Need help identifying a type of PV RSS
  • Does each panel require a RSS device which are daisy chained together?

 

[31ectr0nicb0b]

I am showing the top down view of 4 out of the [8] BBGC2H batteries and this is how I think is the best way to series-parallel the batteries using the least amount of cabling and most efficient.

• Using 1/0 size, I need to double the voltage to 24V so the yellow vertical lines between the + and - depict the series connection between 2 batteries making this a 24V bank
• The yellow/blue connection from the + to + depict the parallel connection between the 24V banks and then it moves off the page onto the next 24V bank, that should be total of [4] 24V banks. Some say to keep the number of banks as minimum as possible, to avoid having the various bank discharge and charge and different rates, but this is what I have to play with.
• Is this done correct? Also, where would the main connection to the charge controller come off? I'm confused about that.