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  1. D

    Is there a electrical reason for two+ PowerWall 2s vs PV system size?

    going back to the OP, the concept of inverter 'clipping' is explained here What is solar inverter clipping? the picture about half way down the article speaks a thousand words.
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    Solar panels over clay tile

    There's no need to drill clay tiles to mount solar panels. in the UK most roofing is clay tiles of some description. there are various mounting systems that involve removing a tile, mounting a plate with a U shaped arm to the roof and then reinstalling the tile. the mounting arm sticks out from...
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    [EU] Powerwall and 3-phase 400VAC

    it seems I was wrong. Residential supplies measure the total usage over each phase. IET Forums - Metering - 3 Phase the datacentre I worked at did it the way I described, and that appears to be a special arrangement for larger supplies (ours was several MW)
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    [EU] Powerwall and 3-phase 400VAC

    As I recall it was down to the way that the power is generated via a giant 3-phase turbine. it was explained to me by our facilities manager when going through a phase balancing exercise. We paid about £0.35 per KWh when a retail power price was about £0.12-0.16, and I had to develop a...
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    [EU] Powerwall and 3-phase 400VAC

    I am note quite sure that this is the case, well at least not in the UK. Here we are billed on the peak phase at any point in time. so for example L1 - 100W L2 - 200W L3 - 100W would be a billing value of 200W. This is one of the reasons that it is so important to keep the phases balanced...