JS Alternators

Directions Website Contact the business

JS Alternators High Performance Custom Alternators. Powerful, Reliable. Internally Cooled, Regulated
Lifetime Warranty, 1 year parts Custom Reliable High Output Alternators

10/14/2026

Diesels ask more of the charging system than any gas truck.

Grid heaters, dual batteries, lift pumps, big audio. The draw is relentless. Our high-output alternators are built for exactly that sustained load. Cummins, Power Stroke, Duramax fitments.

👉 Shop diesel fitments. Link below 👇.

10/14/2026
10/13/2026

A big alternator needs big wire. Meet the Big 3.

The Big 3 upgrades three cables. Alternator-to-battery positive, engine-to-chassis ground, and battery-to-chassis ground. Thicker 1/0 AWG OFC wire lets all those new amps actually reach your system instead of getting choked in factory wiring. Alternator + Big 3 = the complete charging upgrade.

👉 Add the Big 3 to your build. Link below 👇.

Same vehicle. Same test. Different result.We ran a stock alternator and our high-output on the same truck, same load. St...
10/10/2026

Same vehicle. Same test. Different result.

We ran a stock alternator and our high-output on the same truck, same load. Stock browned out the lights. High-output didn't flinch. Same load, clear difference.

👉 Upgrade yours. Link below 👇.

Brandon ManisNo caption needed!
10/09/2026

Brandon Manis
No caption needed!

Brandon Manis No caption needed!
10/09/2026

Brandon Manis
No caption needed!

Address

146 W. Phillips Road Suite H
Greer, SC
29650

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Website

Alerts

Be the first to know and let us send you an email when JS Alternators posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Contact The Business

Send a message to JS Alternators:

Shortcuts

Share

Category