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Saturday, February 14, 2015

What if it rains and I've got a solar electric photovoltaic (PV) system?

What if it rains and I've got a photovoltaic (PV) (solar electric) system?

A question I get all the time!!!

Well it's raining now (13th February at 11.15am) and my 1 KW PV system is generating 190 Watts.

We are currently using less than 190 Watts in the house, therefore we have excess energy being used to recharge the batteries. If we have a power failure now or Load Shedding, we won't use our batteries.

One should also note that Germany is the world's biggest PV installer and they've been installing in a big way since 1991. They only have 40% of the solar irradiation of South Africa and therefore for the same capital cost, South African PV users get 2.5 times the output as compared with German PV users.

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