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Getting the right cable specifications is important to ensuring your MultiPlus-II 230V operates safely and efficiently.
Here’s what you need to know based on the product’s specifications:
Battery Capacity: The battery capacity should be chosen according to the model of your MultiPlus-II. For example, a 12/3000/120 model requires a battery capacity ranging from 400-1200 Ah.
DC Fuse: The recommended DC fuse size is related to the inverter model. For instance, the same 12/3000/120 model should have a 400 A fuse.
Cable Cross-Section:
- For cable runs between 0 – 5 meters, a cross-section of 2x 50 mm² is recommended for a 12/3000/120 model, while a 24/5000/120 model would require 2x 50 mm² as well.
- For cable runs between 5 – 10 meters, you should increase the cross-section to 2x 70 mm² for the 12/3000/120 model and to 2x 70 mm² for the 24/5000/120 model.
Cable Material and Rating: The DC cables should be made of copper and rated for 90ºC (194ºF) to withstand high temperatures.
Connection Terminals: Ensure that the cables are properly attached to the + and – connection terminals, with secure and clean connections to prevent any resistance or power loss.
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Here’s a detailed list of battery cable specifications for various MultiPlus-II models as per the table from the manual:
Victron Multiplus II – 12/3000/120:
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Recommended battery capacity: 400-1200 Ah
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Recommended DC fuse: 400 A
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Recommended cable cross-section for 0 – 5 m: 2x 50 mm²
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Recommended cable cross-section for 5 – 10 m: 2x 70 mm²
Victron Multiplus II – 24/3000/70:
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Recommended battery capacity: 200-700 Ah
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Recommended DC fuse: 300 A
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Recommended cable cross-section for 0 – 5 m: 50 mm²
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Recommended cable cross-section for 5 – 10 m: 95 mm²
Victron Multiplus II – 48/3000/35:
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Recommended battery capacity: 100-400 Ah
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Recommended DC fuse: 125 A
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Recommended cable cross-section for 0 – 5 m: 35 mm²
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Recommended cable cross-section for 5 – 10 m: 70 mm²
Victron Multiplus II – 24/5000/120:
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Recommended battery capacity: 400-1400 Ah
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Recommended DC fuse: 400 A
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Recommended cable cross-section for 0 – 5 m: 2x 50 mm²
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Recommended cable cross-section for 5 – 10 m: 2x 70 mm²
Victron Multiplus II – 48/5000/70:
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Recommended battery capacity: 200-800 Ah
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Recommended DC fuse: 300 A
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Recommended cable cross-section for 0 – 5 m: 70 mm²
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Recommended cable cross-section for 5 – 10 m: 120 mm²
Victron Multiplus II – 48/8000/110:
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Recommended battery capacity: 200-800 Ah
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Recommended DC fuse: 300 A
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Recommended cable cross-section for 0 – 5 m: 2x 50 mm²
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Recommended cable cross-section for 5 – 10 m: 2x 70 mm²
Victron Multiplus II – 48/10000/140:
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Recommended battery capacity: 250-1000 Ah
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Recommended DC fuse: 400 A
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Recommended cable cross-section for 0 – 5 m: 2x 50 mm²
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Recommended cable cross-section for 5 – 10 m: 2x 70 mm²
NOTES:
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“2x” means two positive and two negative cables.
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Do not locate battery cables in a closed conduit.
Make sure to select the specifications corresponding to the exact model of your MultiPlus-II. Proper sizing and fusing of battery cables are crucial for safety and performance.
Always ensure connections are secure and use the recommended cable gauge to support the required current draw.
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