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The Mastervolt product warranty covers this product for the first two years after the 

purchase date. The warranty is limited to the cost of repair and/or replacement of the 

product. Costs of labor or shipping are not covered by this warranty.

Mastervolt cannot accept liability for damage due to the misuse of the product.

Warranty

EUROPE, MIDDLE EAST & 

AFRICA

Snijdersbergweg 93 

1105 AN AMSTERDAM

The Netherlands

+31 (0)20 34 22 100

[email protected]

ASIA/PACIFIC

42 Apollo Drive, Rosedale

AUCKLAND 0632

New Zealand

+ 64 9 415 7261

[email protected]

AMERICAS & CARIBBEAN

N86 W12500 Westbrook Crossing 

Menomonee Falls, WISCONSIN 

53051 

USA

+1 800 307 6702

[email protected]

Contact your local waste disposal department 

to properly dispose of the unit.

Correct Disposal

MLI Ultra Relay and Fuse Connect Kit 

QuickStart Installation Guide

10000017403_00

Specifications

Product code: 

Safety relay: 

Compatible with:

Current rating:

Nominal voltage:

Dimensions:

Weight: 

Operating temperature:

79007712

12V DC 500A

MLI Ultra 12-2750 & 12-5500

300A

48V

total height increases by 65 mm/2.5"

total weight increases by 2 kg/4.4 lb

–25 to 50ºC / –13 to 122ºF

79007724

24V DC 500A

MLI Ultra 24-5500

Carefully read the safety instructions that come with the used 

products, before starting!

If you are not knowledgeable about electrical systems, have an 

electrical professional install this kit.

WARNING

The T-fuse itself is not included in the kit

Model 24V

Model 12V

  

If the current exceeds 

300A, the busbar 

conductor gets hot!

WARNING

Fuse

 

rating

 

Continuous

current

 

5 minutes 

overload current

 

400A

 

300A

 

400A

 

350A

 

260A

 

350A

 

300A

 

225A

 

300A

 

250A

 

185A

 

250A

 

225A

 

170A

 

225A

 

Bracket holes

ML Switch

T-Fuse holder

Busbar conductor

Fuse cover

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