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ls13 avatar image
ls13 asked

how to 12v 1200w Phoenix inverter wire and fuse sizing ?

The manual says maximum gauge wire is 35mm2 or 2awg ? Send a little small for peak power 2400w ? The manual also doesn't have any info on wire fuse size? Do I fuse the wire with 200A (for 2400w) or 100A (for continuous 1200w) ? I emailed Victron North America distributor but did not get any response.

inverter current draw
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3 Answers
basil katakuzinos avatar image
basil katakuzinos answered ·

I am sorry your distributor did not get back to you! That is very dissapointing and something that i think you should make victron aware of!

Your inverter has a 200A internal fuse BUT you are required (where i live by law) to install a second fuse close to your battery. I would go for a 150 Amp fuse installed next to your battery on the positive. this should handle your short peaks fine. fuses take about a second to blow at 200% load.

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electrokid avatar image electrokid commented ·

1000W cont. power / 12V * 1,25 = 83,33A

83,33 * 1,25 = 104A, nearest fuse size could be 120A

Victron Phoenix Inverter VE.Direct 250VA - 1200VA

The max amp in a 2 AWG (nearly 35mm2) is 115A according to this site

https://learnmetrics.com/wire-gauge-chart-amp-wire-sizes

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learner101 avatar image
learner101 answered ·

Follow-up question. Shouldn't you be using 1/0 Awg on a continuous 150A load? is 2 awg the largest size that will fit into the 12/1200?

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electrokid avatar image electrokid commented ·
Yes 2 AWG (about 35mm2) is the largest cable size fittong into the terminals of the Victron Phoenix inverter 12/1200VA
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philippem avatar image
philippem answered ·

concerning the fuse calibration I always try to go to the lowest AMP possible. I would start with a 100A and see if it is working. I also always check weekly the temperature of the cbles, connections....The solar installations need a lot of maintenance and checking.

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