Product Description
Generac 10000020426 Battery Charger: Official OEM Replacement for 0G5744
Keep your portable generator ready for the next power outage with the official Generac 10000020426 Battery Charger. If you own a Generac portable generator manufactured before 2019, you likely have the original 0G5744 transformer-based charger. Photo #1 shows the original 0G5744 charger, and photo #2 shows the replacement 10000020426 battery charger. Since 2019, Generac has phased out that heavy, outdated model in favor of the high-efficiency 10000020426 SMPS charger. This genuine OEM part is the direct, plug-and-play replacement designed to maintain your battery’s health and ensure your generator starts every time.
In 2019, Generac upgraded its charging technology. The older 0G5744 utilized a heavy iron-core transformer, which was prone to generating excess heat and wasting energy. The new 10000020426 uses SMPS (Switch Mode Power Supply) technology.
Key Improvements include:
- Superior Energy Efficiency: Uses significantly less power while maintaining a steady 14V charge.
- Cooler Operation: Unlike the old transformer models that could get hot to the touch, the SMPS version runs cool, extending the life of the charger and your battery.
- Lightweight & Compact: A modern, streamlined design that is much easier to handle and store.
- Better Voltage Stability: Provides a more consistent charge, preventing the "Charger Missing AC" or "Low Battery" warnings common with failing older units.
Product Specifications:
- Part Number: 10000020426 (Replaces 0G5744)
- Output: 14V DC Adapter
- Connection: Standard 2-prong plug-and-play connector
- Type: SMPS (Switch Mode Power Supply)
- Certification: Genuine Generac OEM Part
Compatibility List: (not inclusive)
This charger is universal for most Generac-built portable generators equipped with an electric start. It is compatible with a wide range of brands manufactured by Generac, including:Generac Models: GP6500E, GP7500E, GP8000E, XT8000EFI, XT8500EFI, RS7000E, and more. If you have any questions on what battery charger is proper for your generator, fill out our What Generac Part Do I need? form and a trained Generac tech will send you a link to the proper equipment.
Frequently Asked Questions (FAQ)
1. Is this compatible with my older generator?
Yes. If your generator originally came with the 0G5744 charger, the 10000020426 is the official factory-recommended replacement. It uses the same plug and provides the exact 14V output required.
2. Why should I buy the Genuine OEM charger instead of a cheap knock-off?
Aftermarket chargers often lack UL Certification and proper voltage regulation. A "cheap" charger can overcharge and "cook" your battery or fail to provide enough current to clear a "Charger Missing AC" warning on your control panel.
3. Will this fix the "Low Battery" light on my generator?
If your battery is still healthy but isn't receiving a charge, this charger will resolve the issue. However, if your battery is more than 3–5 years old, we recommend testing the battery itself, as it may no longer be able to hold the charge provided by the new adapter.
Why Buy From Generator Magic?
We specialize in genuine Generac parts. When you buy the 10000020426 from us, you are guaranteed a brand-new, factory-sealed OEM component.
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WORKS
NEW CHARGER WAS LIGHTER THAN I REMEMBER MY OLD LOST CHARGER - CALLED AND THEY SAID THIS IS THE NEW ORIGINAL REPLACEMENT PART - SEEMED FISHY - CALLED GENERAX AND THEY CONFIRMED THIS IS THE REAL DEAL - WORKING GREAT BUT ALSO HAD TO REPLACE OLD BATTERY DUE TO MISSING CHARGER FOR MANY YEARS - VERY HAPPY
