SKU: 48025551978

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

Sale price$72.00 Regular price$80.00
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Ships within 48 hours · Estimated delivery Jul 29 - Aug 3

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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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4.5 ★★★★★
Based on 27 reviews
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Product Reviews
K
Verified Purchase
Katt Marie Limpus
Fort Morgan, US
★★★★★ 5
Perfect OEM Fit in Seconds!
Style: Gloss Black Single Slat, Size: E46(1999-2002)2-Door, Style: Gloss Black Single Slat, Size: E46(1999-2002)2-Door
Perfect OEM Fit in 2 seconds!! I’m surprised and Happy and it looks Perfect on my BMW 2002 330ci
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 14, 2026
I
Verified Purchase
Ian H
Alexandria, US
★★★★★ 3
Check engine light
Style: Gloss Black Single Slat, Size: G20(2019-2022), Style: Gloss Black Single Slat, Size: G20(2019-2022)
Looks good but will throw a check engine light on your car. The fitment isn’t perfect causing the adaptive vents to show that they are failing even though they are not
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
W
Verified Purchase
Works great and a better price than others. Works well in the 16” oven.
Lowell, US
★★★★★ 5
Quick fix
Style: Gloss Black Single Slat, Size: E46(2002-2005)4-Door
Easily Installed with no modification in under a minute. The finish was a little glossier, then OE.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 28, 2026
C
Verified Purchase
Carlos M. Ortiz
Lowell, US
★★★★★ 5
Exact Fit for 2001 BMW 325CI Convertible
Style: Gloss Black Single Slat, Size: E46(1999-2002)2-Door, Style: Gloss Black Single Slat, Size: E46(1999-2002)2-Door
Perfect fit for a 2001 BMW 325CI convertible.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 8, 2026
M
Verified Purchase
mtn rider
Battle Creek, US
★★★★★ 5
Fits nicely and matte looks much better than gloss IMO
I previously purchased a gloss kit that had a very poor fit so I had to return it. I got this which has an excellent fit and I actually like the matte finish much better (everything else which is black on the car is also matte: weather seals, door frame etc)
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 9, 2024

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