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Steptoe, I appreciate you taking the time to respond, but I thought the idea of the forum was to share knowledge, not just snipe from the sidelines. I think the issue of separation and earthing is very pertinent to Solar installations, particularly as these issues are not covered explicitly...

Larnacaman, I am interested in dc as many low power appliances actually run on ELV dc, having to convert from mains ac. Solar PV generates dc, so if we can harvest sufficient solar energy for our low energy devices we can eliminate the need for an inverter and keep voltages to ELV. Electronic...

Sidewinder, Thanks for the reply. You are correct of course. I was hoping someone might have had some experience of ac/dc systems that would be applicable. Cheers Matt

Your reply is a bit too cryptic for me, if you think I've missed the point or something please tell me, but I am studying the requirements closely. Cheers Matt

Thanks for the replies. Not referencing the dc supply to earth seems to be a debatable issue. The Regs for ELV dc are mainly aimed at caravans (Annex A), the best they offer is to warn against mutual, detrimental influence- which does point to the issue of ELV dc getting into the ac system and...

Although there shouldn't be any connection between the ELV dc and the mains ac circuits, under fault conditions, particularly if the negative of the battery is bonded to ac earth, dc may find its way onto the ac circuits and cause malfunction of ac protection devices. I am also interested for...

Hi Folks, I am considering re-using existing ac mains lighting circuits to distribute 24v dc to led lights, supplied by a stand alone solar battery system. Each light has its own SELV rated driver. I have considered the voltage drop issue already and the need for dc rated switches. What I am...