SKU: 85844954327

Balmar 12V Alternator Protection Module

Sale price$148.74 Regular price$165.27
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Description

Balmar 12V Alternator Protection ModuleBalmar Alternator Protection Module: Solid State Defence Against Voltage Spikes and Load Dumps Safeguard Your Alternator from Lithium BMS Disconnects, Switch Interruptions, and Inductive Surges The Balmar Alternator Protection Module (APM) provides robust, solid state protection for your alternators diodes and internal regulator. Designed to clamp high energy voltage spikes and absorb sustained over voltage conditions, the APM is essential for any

Balmar Alternator Protection Module: Solid-State Defence Against Voltage Spikes and Load Dumps

Safeguard Your Alternator from Lithium BMS Disconnects, Switch Interruptions, and Inductive Surges

The Balmar Alternator Protection Module (APM) provides robust, solid-state protection for your alternator’s diodes and internal regulator. Designed to clamp high-energy voltage spikes and absorb sustained over-voltage conditions, the APM is essential for any charging system exposed to lithium battery BMS disconnects, battery switch interruptions, or surges from solenoids, combiners, and starter motors. Without protection, these events can instantly destroy an alternator—the APM eliminates that risk.

Engineered to meet stringent international standards, the APM mounts directly at the rear of the alternator between the B+ and B- terminals, ensuring the shortest possible path for surge diversion. Its compact, sealed design withstands harsh marine and automotive environments, including salt spray and fog, making it ideal for marine alternator protection, RV electrical systems, and off-grid power setups.

How the APM Protects Your Alternator

Voltage spikes occur when a load is suddenly removed from the alternator—such as a lithium battery’s BMS opening under full charge. The resulting load dump can generate spikes well above the alternator’s rating, puncturing diodes and frying regulators. The Balmar APM instantly clamps these transients, absorbing surge currents in excess of 200 A without failure. It also handles sustained over-voltage conditions, shunting excess energy away from sensitive electronics.

Unlike sacrificial devices that fail after a single event, the APM is designed for repeated surges. A green LED indicates active protection; if the module is ever compromised, a red LED and audible alarm alert you to replace it—providing clear, immediate status without guesswork.

Key Features

  • Solid-state surge protection clamps voltage spikes and absorbs load-dump energy
  • Protects against lithium BMS disconnects, battery switch interruptions, and inductive surges
  • Surge absorption in excess of 200 A for repeated events without failure
  • Visual and audible failure indication: green LED = protecting; red LED + beep = replace
  • Compact, direct-mount design installs at alternator B+ and B- terminals
  • Meets ISO 16750-2, ISO 7637-2, SAE J1171, and ASTM B117 for load dump, surge, ignition protection, and salt spray
  • Compatible with all alternator brands and isolated or case-grounded configurations

Built for Harsh Environments

The APM’s sealed electronics and corrosion-resistant construction meet ASTM B117 salt spray/fog standards, ensuring reliable operation in coastal and marine applications. SAE J1171 ignition protection makes it safe for installation in engine rooms and other hazardous areas. Whether you’re powering a marine alternator on a bluewater cruiser, a 12V alternator in a mining vehicle, or a 12V alternator in an off-grid solar system, the APM delivers consistent, maintenance-free defence.

Simple Installation, Immediate Protection

Installation is straightforward: connect the red lead to the alternator’s B+ post and the black lead to B- (isolated ground alternators) or to a case mounting bolt (case ground alternators). The module’s small footprint fits neatly behind the alternator, requiring no additional brackets or wiring runs. Once connected, the APM begins protecting immediately—no configuration needed.

Clamping up to 60 V for 12 V systems, with sustained over-voltage protection beginning around 20 V

Protect Your Investment Today

Don’t leave your alternator vulnerable to a single disconnect event. Install the Balmar Alternator Protection Module and gain peace of mind knowing your charging system is shielded against the most common and destructive electrical faults. Order now to safeguard your alternator and keep your power system running reliably.

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: 85844954327

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Angela C
Draper, US
★★★★★ 5
My teeth look 20 years younger!
Wow, this is the first toothpaste that has actually worked in whitening my teeth. For reference, they were mildly yellow, I'm a daily coffee with creamer drinker. I feel like this toothpaste has taken the color of my teeth back to how they were in my 20s. I like the fresh taste and smooth texture. The tube is smaller than regular toothpaste, but I believe in quality over quantity. I'd rather pay a little more for a quality product with better end results!
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Reviewed in the United States on June 2, 2026
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Patty
Houston, US
★★★★★ 5
You need to read this....A+ stuff!
Ok, I have to give my honest opinion here.... I had (yes past tense) two teeth that had small stains on them and the last time I had my teeth cleaned at my Dentists office he stated he could not remove the stains... So, I read the reviews on this toothpaste, did some more research on Google and got it today. After lunch, I brushed my teeth and looked and the stains and they seemed to look lighter. I thought hummm.? Really? Then after dinner, I brushed my teeth again and just looked into the mirror out of curiosity (been a few hours) and I don't see either stain at all ... completely GONE! I am being very honest and so surprised that both stains were gone... Yeah, I know what you're thinking when you are reading this...B.S. right? Well, I am so surprised myself that I ordered two more tubes since they're on sale and I plan on giving one of them to a friend that has some coffee stains on her teeth and see if it works for her too... So, I would have to say that by purchasing the two tubes that I did, was way cheaper than going to my Dentist that stated they couldn't get rid of the stains. I'm totally 100% impressed with this Crest 3D White .. my new go toooooo forever! P.S. I am a ice tea drinker by heart and sometimes coffee too. Signed: So impressed by this stuff and it actually taste good and made my mouth feel fresh and my breath was fresh for a long time too....A+++++ toothpaste! Quick Shipping as well.....
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Reviewed in the United States on May 29, 2026
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Anna Michelle
Fort Morgan, US
★★★★★ 5
Beautiful white teeth
This works great. I always keep my teeth, nice and clean and bright and white and usually I have to buy Dental whitening, but this is the first time I found a product that you can just brush your teeth a few times a week and it keeps your teeth, nice and white.
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Reviewed in the United States on June 5, 2026
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Scientific Baking
Battle Creek, US
★★★★★ 4
Refreshing toothpaste that helps to deep clean your teeth.
Good tasting toothpaste that cleans my teeth well. It seems to have a tiny bit of grit to it to help remove stains on your teeth. The tube is quite small. So, you do not get a lot of toothpaste. But a little goes a long way. I think that it did make my teeth a bit whiter. I did not have any sensitivity to it at all.
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Reviewed in the United States on May 26, 2026
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Dave
Grantham, US
★★★★★ 5
Works!
This is an updated review changed from 4 stars to 5 stars after using it for a week. This toothpaste actually removed Matcha Green Tea stains that were between my teeth and other tight areas my hygienist couldn't get into. I'd say this is a product for stubborn stains and I wouldn't use it more than maybe a week at a time because it's expensive for the small size you get and I'm not entirely sure what the long term effect is on the teeth.
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Reviewed in the United States on May 24, 2026

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