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NOCO Genius GEN4 40 Amp 4-Bank Waterproof Smart On-Board Battery Charger

4.4 out of 5 stars 677 customer reviews
| 250 answered questions

Price: $293.34 & FREE Shipping. Details
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4-Bank 40 Amp
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  • 40 Amperes (10 Amperes per bank) Smart On-Board Battery Charger for 12-volt batteries; charges and maintains all types of lead-acid batteries from 25-230Ah, including Wet, Gel, MF, and AGM
  • Designed for safety; safe for anyone to use; does not generate sparks, and protects against reverse battery hookup, short circuit, open circuit, overheat, overcurrent and does not overcharge the battery
  • 100 percent waterproof; completely sealed to protect against the most extreme environments and rated at IP68
  • Rapid Charging Technology; Charges batteries 2X faster than traditional battery chargers, and a lightweight, compact design
  • The most advanced charger ever; it features innovative and advanced technology that makes charging easy and simple; the charger makes important charging decisions so you don’t have to. It is the safest, most effective charger you may ever use
22 new from $293.34 1 used from $280.00
$293.34 & FREE Shipping. Details In Stock. Ships from and sold by Amazon.com.

Frequently bought together

  • NOCO Genius GEN4 40 Amp 4-Bank Waterproof Smart On-Board Battery Charger
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Total price: $310.29
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This item NOCO Genius GEN4 40 Amp 4-Bank Waterproof Smart On-Board Battery Charger
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Customer Rating 4 out of 5 stars (677) 4 out of 5 stars (2846) 4 out of 5 stars (415) 4 out of 5 stars (26) 3 out of 5 stars (28) 4 out of 5 stars (617)
Price $293.34 $198.95 $166.24 $557.46 $159.99 $40.99
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Sold By Amazon.com Amazon.com Amazon.com Amazon.com Amazon.com Impact Battery
Item Dimensions 9 x 18 x 12 in 13 x 25 x 13 in 6.18 x 9.29 x 2.95 in 11.5 x 15.5 x 3.5 in
Item Weight 13.5 lbs 7.7 lbs 5.25 lbs 25.81 lbs 6.75 lbs 1.6 lbs

Product information

Style:4-Bank 40 Amp

Technical Details

Additional Information

Warranty & Support

Warranty, Parts:Parts
Product Warranty: For warranty information about this product, please click here [PDF ]

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Product description

Style:4-Bank 40 Amp

The on-board battery charger offers the perfect mix of high-technology and rugged construction. With a fully-sealed, waterproof housing, the GEN1 can be mounted directly onto a variety of applications including boats, tractors and a wide range of equipment. With the intelligent NOCO VosFX processor constantly monitoring the power input, attached battery and charger itself, the GEN1 charger is capable of diagnosing, recovering, charging and maintaining batteries. Automatically adjusts itself to changing current needs. Reverse polarity, short circuit, open circuit, spark proof, overheat, overcurrent and overcharge. High-frequency, high-efficiency for a lightweight, compact charger. Charges batteries 2 times faster than traditional linear battery chargers. 100 per cent full charge even with varying A/C input voltages. Safely charges Wet, Gel, MF and AGM batteries. Automatically shuts off if charger remains in bulk charge mode for an extended period of time. 100 per cent completely sealed. Protects our units from the most extreme environments and rated at IP68. Box includes a charger, owner's manual and user guide and product registration card. 3 Year Limited Warranty and meets ISO 8846 marine standards and ignition protected (US Coast Guard 33 CFR 183.410).


From the manufacturer

marine battery charger, onboard battery charger, onboard battery charger 1 bank marine battery charger, onboard battery charger, onboard battery charger 2 bank marine battery charger, onboard battery charger, onboard battery charger 1 bank marine battery charger, onboard battery charger, onboard battery charger 2 bank marine battery charger, onboard battery charger, onboard battery charger 3 bank marine battery charger, onboard battery charger, onboard battery charger 4 bank
Model GENM1 GENM2 GEN1 GEN2 GEN3 GEN4
Banks 1 2 1 2 3 4
Amps Per Bank 4A 4A 10A 10A 10A 10A
Voltage 12V 12V 12V 12V 12V 12V
Total Amp Output 4A 8A 10A 20A 30A 40A
IP68 Waterproof

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Customer Reviews

Top Customer Reviews

on February 15, 2012
Style: 2-Bank 20 Amp|Verified Purchase
22 comments| 160 people found this helpful. Was this review helpful to you?YesNoReport abuse
on April 28, 2017
Style: 4-Bank 40 Amp|Verified Purchase
0Comment|Was this review helpful to you?YesNoReport abuse
on June 20, 2014
Style: 1-Bank 10 Amp|Verified Purchase
0Comment| One person found this helpful. Was this review helpful to you?YesNoReport abuse
on June 8, 2016
Style: 4-Bank 40 Amp|Verified Purchase
0Comment| 4 people found this helpful. Was this review helpful to you?YesNoReport abuse
on March 20, 2017
Style: 2-Bank 20 Amp|Verified Purchase
0Comment| One person found this helpful. Was this review helpful to you?YesNoReport abuse
on February 26, 2017
Style: 4-Bank 40 Amp|Verified Purchase
0Comment| One person found this helpful. Was this review helpful to you?YesNoReport abuse
on January 5, 2016
Style: 3-Bank 30 Amp|Verified Purchase
22 comments| 7 people found this helpful. Was this review helpful to you?YesNoReport abuse
on March 20, 2012
Style: 4-Bank 40 Amp|Verified Purchase
0Comment| 15 people found this helpful. Was this review helpful to you?YesNoReport abuse

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