Ever been stranded with a dead battery because your sound system was cranking too loud? Or maybe your winch drained everything while you were trying to pull your buddy's truck out of the mud? A high output alternator can be a lifesaver. It's designed to deliver more power than your stock alternator, keeping your battery charged even when you're running a ton of accessories. If you are an overlander, bass head, or just want to make sure you don't get stuck, upgrading your alternator might be the solution.
Product Overview / Quick Summary
- DC Engineering High Output Alternator: Best overall for high amperage and reliability.
- Mechman Alternator: Ideal for extreme audio systems.
- PowerBastards Alternator: Good balance of price and performance.
- Singer Alternators: Premium choice for custom builds.
- Remy High Output Alternator: Economical option for moderate upgrades.
Top 5 Best High Output Alternators
1. DC Engineering High Output Alternator
DC Engineering is known for building alternators that can handle serious power demands. These alternators are designed for reliability and high amperage output, making them a top choice for demanding applications.
Pros:
- ✅ Extremely high amperage output.
- ✅ Built with quality components for long-term reliability.
- ✅ Excellent customer support and customization options.
Cons:
- ❌ Can be more expensive than other options.
- ❌ May require a larger gauge charging wire.
- ❌ Installation might be complex for some vehicles.
Verdict: If you need maximum power and reliability, and you're willing to pay a premium, DC Engineering is the way to go.
2. Mechman Alternator
Mechman alternators are popular in the car audio world. They're engineered to handle the intense power demands of high-end sound systems, providing a stable voltage supply to prevent dimming lights and drained batteries.
Pros:
- ✅ Specifically designed for high-powered audio systems.
- ✅ Excellent voltage regulation.
- ✅ Wide range of amperage options available.
Cons:
- ❌ Can be overkill if you don't have a massive sound system.
- ❌ Some models might require modifications to fit.
- ❌ Higher price point compared to standard alternators.
Verdict: For serious audiophiles who need consistent power for their amps, Mechman is a top contender.
3. PowerBastards Alternator
PowerBastards offers a good balance between price and performance. These alternators provide a significant upgrade over stock units without breaking the bank, making them a popular choice for a variety of applications.
Pros:
- ✅ More affordable than some other high output options.
- ✅ Decent amperage output for the price.
- ✅ Good for general upgrades, not just audio.
Cons:
- ❌ May not be as robust as higher-end brands.
- ❌ Limited customization options.
- ❌ Some users report inconsistent performance.
Verdict: A solid choice if you're looking for a noticeable upgrade without spending a fortune. Good for general use.
4. Singer Alternators
Singer Alternators are known for their premium quality and custom builds. These alternators are hand-built to exact specifications, ensuring optimal performance and a perfect fit for your vehicle.
Pros:
- ✅ Custom-built to your specific needs.
- ✅ High-quality components and construction.
- ✅ Excellent performance and reliability.
Cons:
- ❌ Very expensive compared to other brands.
- ❌ Longer lead times due to custom build process.
- ❌ Might be overkill for basic applications.
Verdict: If you want the best of the best and are willing to pay for it, Singer Alternators offer unmatched quality and customization.
5. Remy High Output Alternator
Remy is a well-known brand in the automotive aftermarket. Their high output alternators offer a reliable and cost-effective way to increase your vehicle's charging capacity without a huge investment.
Pros:
- ✅ More affordable than specialized high output brands.
- ✅ Readily available from various retailers.
- ✅ Decent upgrade over stock alternator.
Cons:
- ❌ Not as high amperage as other options on this list.
- ❌ May not be suitable for extreme power demands.
- ❌ Reliability can vary.
Verdict: A good entry-level high output alternator for those who need a moderate increase in power without breaking the bank.
Buying Guide
Choosing the right high output alternator can seem daunting, but here are a few key things to consider:
- Amperage Requirements: First, figure out how much extra power you need. Add up the wattage of all your accessories (lights, sound system, winch, etc.) and divide by 12 (or 14.4 for a more accurate estimate) to get the amperage draw. Add a buffer for future upgrades.
- Vehicle Compatibility: Make sure the alternator is designed to fit your specific year, make, and model. Some alternators require modifications to fit, so check the product description carefully.
- Wiring Upgrades: A high output alternator can put a strain on your existing wiring. It's often recommended to upgrade your charging wire to a larger gauge to handle the increased current. This prevents voltage drop and ensures efficient power delivery.
- Voltage Regulation: Look for an alternator with good voltage regulation. This ensures a stable voltage supply, which is crucial for sensitive electronics.
- Brand Reputation and Reviews: Research the brand and read reviews from other users. This can give you valuable insights into the alternator's performance and reliability.
- Installation: Consider whether you can install the alternator yourself or if you'll need to hire a professional. Some installations are straightforward, while others can be more complex.
- Warranty: Check the warranty offered by the manufacturer. A longer warranty indicates that the manufacturer has confidence in their product.
- Pulley Size: The pulley size affects the alternator's charging speed at different engine RPMs. Consider a smaller pulley if you spend a lot of time at lower speeds.
FAQs
Q: Will a high output alternator drain my battery if I'm not using the extra power?
A: No, a high output alternator only provides the power that's demanded by your vehicle's electrical system. It won't drain your battery if you're not using the extra capacity.
Q: Do I need a special battery for a high output alternator?
A: Not necessarily, but a deep cycle battery is often recommended. Deep cycle batteries are designed to handle the repeated charge and discharge cycles associated with high power demands.
Q: Can I install a high output alternator myself?
A: It depends on your mechanical skills and the specific alternator. Some installations are straightforward, while others require more expertise. If you're not comfortable working on your car's electrical system, it's best to hire a professional.
Q: What size wire should I use for the charging wire upgrade?
A: The appropriate wire size depends on the amperage of your alternator and the length of the wire run. Generally, 4 gauge or 0 gauge wire is recommended for high output alternators.
Q: How do I know if my alternator is failing?
A: Common signs of a failing alternator include dimming headlights, a dead battery, a warning light on your dashboard, and unusual noises coming from the alternator.
Conclusion
A high output alternator can be a game-changer if you're running a lot of accessories or need more reliable power. Whether you're a car audio enthusiast, an off-roader, or just want some extra peace of mind, there's an alternator out there that's right for you. Consider your specific needs, budget, and vehicle compatibility to make the best choice.
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