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Replacing a 4kW transformer based inverter for a PV system

LittlePlumb
Hi All,

Can anyone assist me please? We installed a 4kW two string PV array in 2011 utilising an inverter which had a transformer and hence galvanic isolation. The inverter has broken and needs replacing, however, inverters these days all seem to be transformerless. Does anyone know where I can purchase a transformer based inverter pls?

Pete
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    Firstly, do you need the galvanic isolation?

    In most cases the main implication of the change would be that the RCD provisions upstream would need to be reviewed but that might be far easier than finding a new inverter with transformer that also has an MPPT range compatible with the stringing arrangement.

    It's also possible that the manufacturer holds replacement stock, though I'd not bank on it. More likely they could recommend a suitable replacement.

    It's worth noting that omitting the transformer makes the inverter lighter and more efficient.... hence the general move towards them now that it's workable.
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  • 0
    Firstly, do you need the galvanic isolation?

    In most cases the main implication of the change would be that the RCD provisions upstream would need to be reviewed but that might be far easier than finding a new inverter with transformer that also has an MPPT range compatible with the stringing arrangement.

    It's also possible that the manufacturer holds replacement stock, though I'd not bank on it. More likely they could recommend a suitable replacement.

    It's worth noting that omitting the transformer makes the inverter lighter and more efficient.... hence the general move towards them now that it's workable.
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