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:
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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]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 85844954327

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4.1 ★★★★★
Based on 14 reviews
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Product Reviews
R
Verified Purchase
Rayven Z
Charlottesville, US
★★★★★ 5
Great quality and perfect for home workouts!
Style: Rack with 3 Pairs (3, 5, and 8 Pound)
I’m really happy with this dumbbell set. The weights are clearly labeled (3 lb, 5 lb, and 8 lb), which makes it super convenient to switch between exercises. The neoprene coating feels comfortable in hand and provides a good grip, even during longer workouts. The storage stand is a big plus—it keeps everything organized and saves space, which is perfect for a small home gym. The colors are also nice and make it easy to quickly grab the weight you need. Overall, this is a great set for beginners or anyone looking to add light strength training to their routine. Highly recommend!
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Reviewed in the United States on April 13, 2026
D
Verified Purchase
DCat
Phoenix, US
★★★★★ 5
I’m A PT AND USING THEM IN MY CLINIC. PLS READ HONEST AND THOROUGH REVIEW.
Style: 15 Pound, Pair
I have been a PHYSICAL THERAPIST FOR 30 YEARS and I BOUGHT THESE FOR MY CLINIC. THESE WEIGHTS ARE COVERED IN A GRIPPING MATERIAL, NEOPRENE, MAKING IT COMFORTABLE and EASIER TO USE, ALLOWS YOU TO NOT LOSE YOUR GRIP, and IT IMPROVES THE SAFETY OF THE USER. I WILL BE BUYING THE 12&20 lb sets! THE VALUE FOR YOUR MONEY IS WONDERFUL!! AMAZON BASICS REALLY CAME THROUGH. It DID NOT INCLUDE AN INSTRUCTION GUIDE TO USE WEIGHTS SAFELY AND EFFECTIVELY. STELLAR FORM IS ALWAYS ESSENTIAL. MY WEIGHTS WENT UP TO 10 POUNDS, SO I DEFINITELY NEEDED ADDITIONAL WEIGHTS for those who can SAFELY TRANSITION . I MAINLY WORK AS A MANUAL THERAPIST …USING ONLY MY HANDS, AND MY BRAIN. TO DIAGNOSE AND TREAT ACCORDINGLY. (**ANYONE WHO HAS BEEN TO PT KNOWS THIS KIND OF ONE ON ONE TREATMENT IS UNHEARD OF**) I IMPLEMENTED MYOFASCIAL RELEASE, TRIGGER POINT THERAPY, DEEP TISSUE MASSAGE, AND APPROPRIATE STRETCHING AND EXERCISE . ONCE PATIENTS WERE ABLE, I INITIATED THERAPEUTIC EXERCISE. I WAS GETTING SO MANY REFERRALS THAT I MOVED FROM MY SMALL SPACE AND GOT A LARGER SPACE THAT LOOKS LIKE A TYPICAL PT CLINIC. I STILL EMPLOY ONE ON ONE TREATMENT, NO JUGGLING SEVERAL PATIENTS IN AN HOUR. I HAVE HIRED HELP TO ASSIST PATIENTS WITH EXERCISE AND STRETCHING. I PURCHASED TWO ADDITIONAL SETS ITHE SET IT I DID TO FIRST CHECK THEM OUT. I ADORE THESE AND HAVE SINCE ORDERED OTHER SETS. I LOVE TO WORKOUT AND I NEEDED TO USE THESE WEIGHTS MYSELF!! THERE ARE ALSO PATIENTS OF MINE WHO WILL PROGRESS TO THESE AS WELL. I AM SUPER IMPRESSED WITH THESE WEIGHTS AND CANNOT WAIT TO RECEIVE MY TWO OTHER SETS!! YOU WILL NOT BE DISAPPOINTED. EVEN IF YOU SWEAT, YOU ARE STILL ABLE TO HOLD ONTO THESE WEIGHTS COMFORTABLY AND SAFELY. SAFETY IS KEY, ALWAYS. I WAS EXTREMELY DELIGHTED THAT THEY ARE SOLD AS A SET BECAUSE MANY ARE SOLD SEPARATELY. THEY FIT PROPERLY ON A UNIVERSAL WEIGHT STAND, SO THEY ARE VERY EASY TO STORE. I CANT WAIT TO GET MY OTHER SETS! IT IS REALLY SAFE AND COMFORTABLE TO USE THESE WEIGHTS. THEY DID NOT GIVE OFF AN ODD ODOR, which is A HUGE PLUS because SOME OTHER BRANDS SMELL HEAVILY OF PLASTIC OR A CHEMICAL TYPE ODOR. THERE WAS NO ODOR AT ALL. THIS IS A HUGE PLUS. I AM COMFORTABLE SAYING THAT THESE WEIGHTS WILL LAST A LONG TIME BECAUSE OF HOW WELL THEY ARE MADE. YOU CANNOT BEAT THE PRICE EITHER!! THESE ARE ABSOLUTELY APPROPRIATE FOR PROFESSIONAL USE, AND, THEY ARE MEANT FOR PERSONAL USE AS WELL. SOMETIMES YOU JUST CANNOT GET TO THE GYM SO THIS IS WHERE THEY ARE KEY. HAND WEIGHTS HAVE THE ABILITY TO EXERCISE EACH MUSCLE OF THE TORSO AND ARMS. THERE ARE SOME EXCELLENT WEIGHT CHARTS OUT THERE TO SHOW YOU HOW TO DO THAT. IF YOU ARE GOING TO PHYSICAL THERAPY, THEN YOUR THERAPIST CAN INSTRUCT YOU AND KEEP YOU IN GOOD FORM. YOU COULD POSSIBLY HURT YOURSELF IF YOU WORKOUT INCORRECTLY. AS FAR AS THE LOWER EXTREMITIES, YOU CAN DO GROSS MOTOR EXERCISES BY HOLDING THESE WEIGHTS TO GET YOUR LEG MUSCLES BY DOING SQUATS, WALKING LUNGES, TOE RAISES, AND MORE. I DONT BELIEVE THAT MANY PEOPLE REALIZE JUST HOW MUCH YOU CAN DO FULL BODY EXERCISES WITH JUST TWO HAND WEIGHTS. IN CONCLUSION , THESE ARE EXCELLENT WEIGHTS THAT I WOULD RECOMMEND TO MY PATIENTS OR FRIENDS. THIS IS A HIGH QUALITY PRODUCT THAT WONT BREAK YOUR PIGGY BANK. I HIGHLY RECOMMEND VERY HIGHLY!. BUY WITHOUT RESERVATION!! A+++
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Reviewed in the United States on March 23, 2025
A
Verified Purchase
Aimee C.
Waukegan, US
★★★★★ 4
Perfect size and weight with compact size
Style: Rack with 3 Pairs (3, 5, and 8 Pound)
I purchased the Amazon Basics Neoprene Dumbbell Hand Weights specifically for Pilates, and they’ve been a great addition to my routine. The size and weight are perfect for controlled movements, helping with muscle toning without feeling too bulky or awkward. The neoprene coating gives them a comfortable, non-slip grip, which is especially important during longer sessions or when your hands get a little sweaty. They feel secure and easy to hold through a full workout. I also like the shape—they don’t roll around on the floor, which makes transitions between exercises smoother and less frustrating. They’re compact enough to store easily but still feel durable and well-made. Overall, these are a simple, affordable, and effective option for Pilates or light strength training. I’d definitely recommend them for anyone looking to add a little resistance to their workouts without overcomplicating things.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 20, 2026
J
Verified Purchase
J. saroukhan
Pawtucket, US
★★★★★ 5
Well made , gym quality
Style: 10 Pound, Pair
Color is nice and bright . The weights grips are good they do not slip . Prices reflect quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
K
Verified Purchase
Kim Wood
New York, US
★★★★★ 5
Good purchase
Style: 3 Pound, Pair
These are just the right weight for me to start gaining muscle back in my arms, after a large weight loss. They are of good quality, they are covered in a nice rubber like coating that is soft to the touch. They are small enough that i can take them with me when I travel. My dog has got hold of them a couple times and played with them, and they held up just fine without any damage.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026

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