Off Peak electricity as an alternative to Solar

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Originally Posted by EchiDna

JD has it - buy a junked server room UPS for your charger - all the transformers etc will be fine, the batteries you have already - as long as the voltages for the transformer's secondary fit to your battery backup system, you are home and hosed...

there is a great article on Dan's dataon a very similar topic: The DIY (or, if you must, "Ghetto") UPS

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Was thinking of that page myself.

Simon

Thanks for all the great replies and keep them coming.

As to the regulations, there are no Fed or state regulations but the regulations are set by each power provider and each provider has there own rules so I will have to sort out what my provider will or won’t allow.

Long way off installing anything yet.

I have 2kw grid connected solar system. Solar powers the house + excess into the during the day as you probably know. So no blackouts during the daytime.

In S.A. "off peak" is only allowed for hot water and heating.

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... permanently installed storage water heaters with a rated delivery of not less than 125 litres, storage space heaters and other approved thermal storage applications