The alternator I bought from you doesn't work.

Each alternator is bench-tested before shipping. Apparent failure is usually due to ordering the wrong unit, shipping damage, or installation mistakes. Verify the part number, inspect for damage, and review the proper installation steps (Technical Tip TT-648) before contacting support.

The alternator I bought from you doesn't "put out".

Low-output symptoms are often caused by factors outside the alternator. Measure voltage directly at the rear of the unit with a digital meter; if readings seem low, check the common issues listed below or return the alternator for a free bench test.

High-output alternators ship with an overdrive pulley that may require a belt about 1 inch shorter than stock. Use a quality, oil-free belt to prevent slip and ensure full output.

Regulator plug not plugged in, not seated properly or pinched wire

Make sure the small regulator plug on the alternator is fully seated and oriented correctly. A pinched or missing connection will prevent charging. Self-exciting models (e.g., Fitzall 220A+) do not use this plug.

Battery warning light bulb in dash missing, blown or bad connection

Some vehicles rely on the dash battery-warning bulb to excite the alternator. A blown, missing, or poorly connected bulb can cause a no-charge condition.

Customer changed alternator pulley

Replacing the supplied overdrive pulley with a larger-diameter pulley slows the alternator and decreases charge output.

Vehicle crankshaft pulley diameter too small

Aftermarket under-drive crank pulleys spin accessories more slowly and can severely reduce alternator output. Ensure the crank pulley is at least OEM size.

Main vehicle charge wire too small or not upgraded

Factory charge wiring is sized for OE amperage. When loads rise, upgrade to a heavier-gauge cable such as the Big Zero kit to avoid voltage drop and false low-output symptoms.

Too many grounds, insufficient grounds, or just bad wiring

Improper, corroded, or excessive grounds-as well as undersized or poorly crimped wires-can cripple alternator performance. Have a qualified technician inspect and correct wiring.

Bad, old, weak, damaged or cheap battery

Weak or inexpensive batteries-especially some gel-cell types-may not accept the alternator's current. Use a healthy wet-cell battery with sufficient cold-cranking amps.

Alternator possibly damaged during installation

High-output units contain sensitive electronics. Skipping the recommended battery-disconnect procedure or other steps in Technical Tip TT-648 can damage the regulator and cause no-charge conditions.

The alternator I bought from you doesn't fit.

Direct-fit models require no hardware changes. Universal Fitzall 220A+ units need custom brackets and may require a shorter belt.

Do you sell brackets, spacers or hardware to mount the Fitzall on my particular application?

Due to the vast number of vehicles, PowerBastards does not supply custom mounting hardware. Most customers fabricate brackets themselves or hire a qualified shop.

I tested my alternator and it only makes 30A.

Alternators supply only the amperage the system demands. Clip-on amp meters can be inaccurate; 30 amps may be normal at low load. Send the unit in for a free certified output test if in doubt.

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370A High Output Alternator for GMC Sierra 3500 HD, 2024 6.6L V8 (401c.i.) GAS

1 of 3

Product ID 87842530-370-HD1-9

370A High Output Alternator for GMC Sierra 3500 HD, 2024 6.6L V8 (401c.i.) GAS

370A HD SERIES Direct Fit Alternator for GMC Sierra 3500 HD, 2024 6.6L V8 (401c.i.) Specifications:

Idle Output: 185+ AMPS
Full Output: 370+ AMPS @ 1200 Engine RPM
Total Output: 370+ AMPS

Powder Coat

List Price: $789.00

Price$595.00

Product ID article_crankpulley

Underdrive Crank Pulley

INSTALLING AN UNDERDRIVE CRANK PULLEY WILL DECREASE YOUR ALTERNATOR OUTPUT.
Is it worth the $$$ and decreased alternator performance? The dyno told us what we already knew...

Price$0.00

Product ID BIG_ZERO_Wire_Kit

The BIG ZERO Wire Kit Explained and Why You Need It

Don’t settle for stock—upgrade your main charge cable for unmatched power and reliability. A true companion to our high output alternator. Perfect for vehicles running aftermarket audio, lighting, or accessories that demand more than the factory system can handle. Built tough. Charges strong.

Price$0.00

Product ID High_Output_Alternator_for_Overlanding

Why Every Overlander Should Upgrade to a High-Output Alternator

Tackle the wild with confidence—our high output alternators are built for overlanding rigs, boondocking, camping vans and 4x4 freaks that demand serious off-grid power. Whether you’re running fridges, winches, lights, or comms, this upgrade keeps your batteries charged and your adventures uninterrupted.

Price$0.00

370A High Output Alternator for Ford F-150, 2021 - 2023 3.3L V6 (204c.i.)

1 of 4

Product ID ML3T-10300-BB-370-HD1-2

370A High Output Alternator for Ford F-150, 2021 - 2023 3.3L V6 (204c.i.)

370A HD SERIES Direct Fit Alternator for Ford F-150, 2021 - 2023 3.3L V6 (204c.i.) Specifications:

Idle Output: 185+ AMPS
Full Output: 370+ AMPS @ 1200 Engine RPM
Total Output: 370+ AMPS

Powder Coat

List Price: $729.00

Price$595.00

Product ID Toyota-RAV4-Alternator

Toyota RAV4 Alternator

Price$0.00

Product ID Why_High_Output_Alternators_Matter_for_Your_Build

Do I Need a High Output Alternator?

Any alternator will work, right? Think again. Understand the significance of a high-output alternator and how it can significantly impact performance and reliability of your entire vehicle.

Price$0.00

250A High Output Alternator for Volkswagen Beetle, 2012 - 2014 2.5L L5 (151c.i.)

1 of 4

Product ID 11460-250-HD1-2

250A High Output Alternator for Volkswagen Beetle, 2012 - 2014 2.5L L5 (151c.i.)

250A HD SERIES Direct Fit Alternator for Volkswagen BEETLE Specifications:

Total Output: 250+ AMPS
Idle Output: 125+ AMPS
Full Output: 250+ AMPS @ 1200 Engine RPM

Powder Coat

List Price: $589.00

Price$465.00

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