question

seamus asked Oct 19, '23

Adding a 230v Multiplus to a Quattro 120v marine system

We want to add 230VAC 50Hz to our existing 120VAC 60hz boat. The 120 Quattro and 230 multi both have neutral to chassis therefore to ground, I anticipate issues having the two voltages and frequencies tied to the same ground? I know boat are using this system anyone have input on this issue?

TIA

Seamus

[moderator note: edited voltages for accuracy and clarity]

MultiPlus Quattro Inverter Charger

2 |3000

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Mike Dorsett commented · Oct 19, 2023 at 06:31 PM

The biggest issue here is any leakage from the live (active) lines. Bear in mind that due to the different frequencies, the 230V system, which has a peak instantaneous voltage of 352V, and the 120V system with peak instantaneous voltage of ~170V will be out of phase every 0.1 seconds. This gives a peak instantaneous voltage of 495V. as well as using RCCD's on both systems, all AC wiring will need to be carefully segregated.

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