SKU: 48025551978

CROWN INDUSTRY 500a split charge relay for isolating 2nd battery

Sale price$72.00 Regular price$80.00
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  • CAN

Ships within 48 hours · Estimated delivery Jul 30 - Aug 4

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Description

CROWN INDUSTRY 500a split charge relay for isolating 2nd batteryThis relay Perfect for isolating one of our lithium batterys when in conjunction with the factory oem battery preventing our lithium from draining down to the float voltage of the oem factory battery. Giving a longer life span to the lithium and putting less stress on the alternator and engine when starting the vehicle. Our RLY 500 is Ideal for 2nd battery isolation, our high current relay is the most reliable and efficient way to add secondary

This relay Perfect for isolating one of our lithium battery’s when in conjunction with the factory oem battery preventing our lithium from draining down to the float voltage of the oem factory battery. Giving a longer life span to the lithium and putting less stress on the alternator and engine when starting the vehicle. 

Our RLY-500 is Ideal for 2nd battery isolation, our high current relay is the most reliable and efficient way to add secondary batteries to your system. Compatible with all types of alternators and charging systems, simply connect these relays to operate when the ignition is turned on. The battery systems remain separate while the ignition is off, preventing system drain. Water resistant black phenolic plastic, 100,000 mechanical cycle life. With a  500 amp contact rating.

  • Prevents primary battery discharge
  • Maximum current transfer 
  • Ideal for 2nd audio battery isolation from vehicle systems
  • High current relays are the most reliable and efficient way to add secondary batteries to your system
  • Compatible with all types of alternators and charging systems
  • Water resistant black phenolic plastic
  • 100,000 mechanical cycle life
  • 500A constant 900A peak current
  • Compatible with all types of LITHIUM, AGM, LEAD ACID batteries 
  • m8 input and output studs 
  • m5 studs for the energisation coil 
  • 95mm tall x 67mm wide 
  • 12 month warranty 
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 48025551978

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Dr. DeeJaye
Birmingham, US
★★★★★ 5
Just what I wanted.
Color: Black, Navy Blue, Wine Red, Size: 5X-Large
These may have just become my standard shirt to wear. Feels good whether tucked or out. Drapes well and fits well. So far, I can see it adjust to the different undershirt I may wear. Will probably order another set in other colors and a back up set of the basics because they will get worn a lot.
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Reviewed in the United States on July 17, 2025
C
Chloe
Lowell, US
★★★★★ 3
Its alright
Color: Black, Size: 5X-Large
True to size per the size chart. The fabric is soft but it it feels cheap to me. It attracts lint but you can brush it off easily so its not the cheapest material I've dealt with. Also, it is opaque (not see through). There is no front/ back indicator either which is indicative of a cheap shirt in my opinion. Would be friendly for tag sensitive people (to stay positive).
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Reviewed in the United States on April 14, 2026
A
Verified Purchase
Amazon Customer
Boise, US
★★★★★ 5
Fit and colors are perfect
Color: Black, White, Apricot, Size: Large
They fit very well, I got them for my husband and he was very excited for the style & fit i am actually going to buy him another pack
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Reviewed in the United States on October 7, 2025
C
Verified Purchase
ChilledOut
Grantham, US
★★★★★ 1
Fuzzballs get wearing once
Color: Black, Size: X-Large
Very smart to wear, but the quality is terrible so after one wash the collar start fraying and fuzzballs start forming. Very disappointing.
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Reviewed in the United States on June 2, 2026
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Verified Purchase
John
Los Angeles, US
★★★★★ 5
Size
Color: Navy Blue, Size: 3X-Large
love the shirt and they fit well for an overweight man. All the ones I got are consistent in size and you don't see that often.
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Reviewed in the United States on April 21, 2026

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