SKU: 69874519011

Automotive 12V Battery Isolator (50A)

Sale price$245.25 Regular price$272.50
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Description

Automotive 12V Battery Isolator (50A)Automotive 12V Battery Isolator (50A) Item: 50 amp battery isolator Cut out Voltage: 12. 8V Cut in Voltage: 13. 2V Current Draw Charging: 250mA Wide application: Universal for all cars Operating voltage: 12V Size: 85x45x40mm (LxWxH) cut in voltage: 13. 3V cut out voltage: 12. 8V Fit for: Car Marine Caravan Cars Vehicles, ATVs, UTVs etc. Name: Aftermarket 12V Battery Isolator (50A) Voltage: Operates on 12 DC only Continuous Max Current: 50A Current

Automotive 12V Battery Isolator (50A)

Item: 50 amp battery isolator
Cut-out Voltage: 12.8V
Cut-in Voltage: 13.2V
Current Draw - Charging: 250mA
Wide application: Universal for all cars
Operating voltage: 12V
Size: 85x45x40mm (LxWxH)
cut in voltage: 13.3V
cut out voltage: 12.8V
Fit for: Car /Marine /Caravan/ Cars Vehicles, ATVs, UTVs etc.
Name: Aftermarket 12V Battery Isolator (50A)

Voltage: Operates on 12 DC only
Continuous Max Current: 50A
Current Draw - Standby: 10mA
Delay: Cut In 15 Seconds / Disconnect 15 Seconds
Recommended Fuse: 50Amp
Power Studs: M6 brass with tin plate
Nuts brass with Nickel plate
Surge Protection: Built-in

How does it work: When the vehicle's engine is running, the alternator will charge the Start Battery. Once the Start Battery has reached 13.20V the isolator will wait 15 seconds then connect the Start and Auxiliary Batteries enabling them to charge simultaneously. When the vehicle's engine is not running, the alternator is no longer charging so the Start Battery voltage will drop. Once the Start Battery voltage is below 12.8V after 15 seconds the VSR will disconnect the Start Battery from the Auxiliary Battery. This means the Auxiliary Battery can NOT drain the Start Battery.

Installing the VSR 1: Connect the (+) positive wire from the Start Battery to the terminal on the VSR marked Main. 2. Connect the (+) positive wire going to the Auxiliary Battery's positive terminal to the other terminal on the VSR. 3. Connect the thin black earth wire to either the vehicle chassis or the Start Battery's negative terminal. 4. Secure the VSR in place.

Important: It is recommended that a 50 Amp fuse is installed between the Starter Battery and the VSR. The negative wire will run from the Starter Battery terminal through to the Auxiliary Battery either directly or via the vehicle chassis. There is a delay built into the VSR which means it can take up to 15 seconds for the VSR to connect or disconnect. The VSR has a light built in which will illuminate when the VSR is engaged (both batteries are connected). If the VSR does not disconnect when you switch the vehicle engine off try turning your high beam lights on for a few minutes

Aftermarket 12V Battery Isolator (50A)

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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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]
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SKU: 69874519011

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4.2 ★★★★★
Based on 23 reviews
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W
Verified Purchase
W. Biggs
Belleville, US
★★★★★ 4
Good value for the money
Size: For BMW E46 2002-2005
The matte is flawless and looks pristine & super easy to install. It does fit and it’s a good enough fit for a daily driver; however, it’s not a flawless fit. It’s off by maybe a 1/16th on the inside corners. It’s amazingly close despite the price point…would definitely recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 28, 2022
S
Verified Purchase
Slow Walk
Grantham, US
★★★★★ 1
VERY poor materials and fit for E46, WILL FALL OUT
Size: For BMW E46 2002-2005, Size: For BMW E46 2002-2005
This part resembles the original, but not enough. It is both too big AND too small, depending on the dimensions. It's too small from top to bottom, and too big from side to side. The locking tabs don't get close enough to lock (see pics) because there is too little clearance. Viewing from the front, the outer top corner is so far out (see pics) that the most important tab cannot properly lock in, causing the grill to drop out into my hand (or the ground, if I wasn't there to catch it). The grill also is missing some important curves to follow the shape it is supposed to fit into. It also wasn't matte black as ordered. It looks like it was spray-painted, but I can't be sure. it is made of VERY brittle plastic, and the locking tabs are VERY small and flimsy. I wouldn't expect this part to survive a month or two before blowing away in a medium breeze. One positive is that there is a relief cut to allow the hood safety catch handle to move fully upward without interfering with the plastic grille. That one positive has a lot of making up to do, and there's no way it can do it. Add to that that the seller included instructions for a car fifteen years newer than the model advertised on the item page, and we have a complete failure. But don't worry! I'm sure the seller will probably delete the listing and make a new one so they don't have to have this honest review attached to it.
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Reviewed in the United States on March 6, 2025
W
Verified Purchase
Will Gonzalez
Bozeman, US
★★★★★ 5
Quality grills for e46 BMW
Size: For BMW E46 2002-2005
No reason to buy replacement grills at the dealer or even at an auto parts store. These are great quality for a fraction of the price...and you get both sides. Highly recommended if you have an e46 and the grill plastic has deteriorated and is loose. These grills are thick and robust. I like them better than the original. Fit is snug but they look great.
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Reviewed in the United States on October 18, 2025
K
Verified Purchase
kyaw zin
Carnegie, US
★★★★★ 3
Fit but needs works
Size: For BMW E46 1998-2001
It fits but you have to cut some plastic to have room for hood latch
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Reviewed in the United States on June 27, 2025
A
Verified Purchase
Alan M.
Cuba, US
★★★★★ 5
Good fit, looks good
Size: For BMW E46 2002-2005
Easy to install in a few minutes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2025

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