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Fronius Wiring


KKDJC

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Silly question, but I am about to install a Fronius inverter. The manual does not state anywhere the 240V single phase 2 wire connection option (L+N). So do I just wire L to L1 and N to L2?, What about the neutral connection? Do I just leave it open?

Thanks. 

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8 hours ago, KKDJC said:

So do I just wire L to L1 and N to L2?, What about the neutral connection? Do I just leave it open?

Just for interest sake, where are you based? If you are in SA, where did you buy this Inverter? Does it look like the one in this picture?

Fronius..JPG.44f686092a0137ee06480dbd1d90b1f7.JPG

I suspect your inverter was designed for a "Split Phase" setup, but unless you are staying in a country with a Split Phase supply, you wont be able to use this inverter.  Please see attached diagram. 

Example.JPG.07cf7ea8529788dcb162c7909989c2d0.JPG

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ahh. If it is designed for a split-phase supply then you could possibly use it with the addition of a transformer. You would need a transformer with a 230V winding and then a center tapped 460V winding (Or just 2 more 230V windings that you connect in series, but you need to make sure they are the correct way around) Then you can connect the center tap to neutral and the other two connections to L1 and L2. (This may be quite an expensive transformer though)

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I've seen single-phase Fronius 240V inverters installed in a split-phase manner before. In those inverters, there is an L1 and L2 connection, but no neutral. Instead there is just a terminal marked "sense". An inverter like that can (to my knowledge) be used in a single phase 230V setup. But in your case you have a neutral connection, so that's off.

You could put one of these in the middle. It has jumpers for configuring 230V/115V, which means the center tap on the input side is exposed. But it's a 500 Euro aka 10k ZAR piece of equipment..

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