Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
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Description
Hulk 4x4 DC-DC Dual Battery Charger 12/24V 40AHulk 4x4 DC DC Dual Battery Charger 12 24V 40A (HU6540) Hulk Professional DC DC Battery Charger 12 24V 40amp Automatically selects the input: Alternator, Solar, DC based on active input with no manual switching required Ignition connection allows low input selection and Solar MPPT regulator allows to work with 12V, 18V or 24V Solar Panels 7 Stage Multi Chemistry Switchmode charging provides charging for all standard Lead acid, GEL, AGM, Calcium and
Hulk 4x4 DC-DC Dual Battery Charger 12/24V 40A (HU6540)
Hulk Professional DC - DC Battery Charger 12/24V 40amp
- Automatically selects the input: Alternator, Solar, DC based on active input with no manual switching required
- Ignition connection allows low input selection and Solar MPPT regulator allows to work with 12V, 18V or 24V Solar Panels
- 7 Stage Multi-Chemistry Switchmode charging provides charging for all standard Lead-acid, GEL, AGM, Calcium and Lithium auxillary batteries
- Dual charging modes enables to work with fixed voltage (standard 12V or 24V alternators) and variable voltage alternators (smart)
- Wide voltage input of between 9 - 42 Volt provides an option of charging from both 12V and 24V vehicle systems
- Using the temperature sensor, continually adjusts its charge rate to suit battery temperature protecting it against over-charging and over-heating
- Can be connected in parallel to provide more output when using high output alternators
- IP67 Rated, sealed against dust or water ingress and safe to operate in -20°C to +85°C
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
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
4.0 ★★★★★
Based on 2390 reviews
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Product Reviews
★★★★★ 5
Very good quality
Size: 2-pack
Good quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
★★★★★ 5
As advertised
Size: 2-pack
Worked great on a replacement headliner for my 99 Jeep Grand Cherokee
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 22, 2025
★★★★★ 3
Ight
Size: 2-pack
Just get the Permatex for a better "spray on", both cans I bought required way too much effort in shaking between spraying. I did shake the can well before use.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 6, 2025
★★★★★ 5
Best choice! Absolutely necessary for anything above basic stock bass.
Bonded to services well, completely removed panel reverberation in my tacoma. Also really made the doors so much quieter even when closing. Very happy with the result.
Used only one set on my 01 tacoma 4 door. Installed inside doors on exterior skin panel, over interior door panel access holes (sealing the door to provide backpressure to door speakers (left drains open)), roof panel, and back wall of cab. Achieved about 70% coverage and am very happy.
2 8in SKAR SVR8 at 1oh on walmart power acustic 2500 (only rated to ~800rms at 2oh, forum showed testing at 1oh worked about 1kw) in 6th order with blow through into cab. With cab gain, im over 130db between ~30 and ~50hz. This was a necessary addition!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 13, 2026
★★★★★ 5
Nice and sticky
Works as it should. No complaints.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
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