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Newmar NS-12-20 StartGuard

MPN: NS-12-20
SKU: CW102320

Newmar NS-12-20 StartGuard

MPN: NS-12-20

SKU: CW102320

3 in stock


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NS-12-20 StartGuard

The abrupt DC system voltage drop that accompanies engine starting can cause micro-processor-driven electronics aboard vehicles or vessels to “dump” programmed memory. StartGuard solves these problems by providing supplemental power to sensitive electronics while the engines are cranking. Newmar’s NS-12-20 StartGuard supplies backup power for electronics during engine start. 


Mount the StartGuard in any convenient location, such as under the dash or console, using the four mounting screws provided or #10 bolts.


Input from the power source to the electronics must be routed through the StartGuard.


  • Input Voltage: 13.8-14.8 VDC nominal, 15.5 VDC Max
  • Relay Activation Input Voltage: 7-15 VDC
  • Output: 20 Amps Max
  • Battery: 12 VDC, 4.0 Amp/Hour, Sealed Rechargeable, 3-5 Year Life (Typical)
  • Backup Capacity (Fully Charged): 20 Amps for one minute/18 Amps for 2 minutes
  • Operating Temperature Range: 0-40 degrees Celsius
  • Winter Storage Temperature Range: -20 degrees to +40 degrees Celsius
  • Dimensions: 8.25″ x 4.9″ x 3.5″
  • Weight: 5.5 lbs

This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.
Manufacturer : Newmar Power
Manufacturer Part No : NS-12-20

Additional information

Weight 6.30 lbs
Dimensions 10.00 × 10.00 × 9.00 in


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Newmar NS-12-20 StartGuard

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Wayne JonesWayne Jones
17:39 20 May 24
I ordered the wrong part first time. In 2 days they sent the correct switch . Very fast and knowledgeable.
Ilya DubinaIlya Dubina
16:19 13 May 24
been my go to spot for my GLS cruiser, won't let you down
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12:50 13 May 24
Super fast shipping.Great people to deal with, highly recommend... Thank you.
Evgenii TurushevEvgenii Turushev
15:25 01 May 24
I'm getting the parts for my boat in Tampa on time and every time with no issues. The service is definitely on point!
Jason WebreJason Webre
18:13 04 Apr 24
When I order my bracket, I put the wrong mailing address. So the post office returned it to Fast Boat Parts. Armen the rep. For Fast Boat Parts, Immediately returned my call & has been doing a great job of watching for the returned bracket, keeping me informed of the status. The first bracket was delivered quickly & Armen has been very nice & thoughtful in assisting me with getting another bracket mailed to my correct address.
Safety RestoreSafety Restore
19:32 02 Mar 24
The ultimate place for your boat parts. Incredibly up to date with the tracking and searching within their database which makes a huge difference when browsing through a ton of sites these days. Also an extensive collection of all makes & models, so it’s a one stop shop!
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21:46 28 Feb 24
Super easy website experience with fast shipping! Would order from them again
Jonathan CookeJonathan Cooke
15:48 24 Feb 24
Great customer service. Helped me promptly when I had a problem.
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00:53 20 Feb 24
Got what I needed, very friendly personnel and easy process. Highly recommend.
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00:20 04 Feb 24
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20:25 03 Feb 24
Awesome buying experience! The selection and availability is vast! I mistakenly ordered a wrong part and they easily processed my return and refunded the $$. Great service and experience. Highly recommended!
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Ivana GrossIvana Gross
04:38 07 Oct 23
Very helpful and friendly staff! Would definitely recommend.
Donna TerzianDonna Terzian
17:27 24 Aug 23
I am very pleased with the outstanding customer service I received with Fast Boats. They went out of their way personally to communicate with me and ensure a product, price, and delivery I would be happy with. Customer service rep Armen showed what good customer relations is all about.Donna