Researchers found that the extra power drawn to recharge batteries in backup power setups without solar power generation could undermine the very thing load-shedding means achieve.
Researchers found that the extra power drawn to recharge batteries in backup power setups without solar power generation negated the very thing load-shedding was set up to achieve.
“All a battery does is to store electricity at times when electricity is available to it, and then uses up that same electricity when the power supply is no longer there ,” said Winkler. “In practice, what happens is that when power cuts set in, the battery starts discharging, but the moment the power comes back on, the use of electricity goes up well above what it would otherwise be because the battery is no longer full, and extra electricity is needed to charge it,” said Winkler.
“The ideal is if the battery is only charged by the solar panels, as that then does not draw more electricity from Eskom,” said Winkler. The researchers tested the extent of the problem by simulating a group of 12,000 residential households to determine the impact of inverter and battery setups on load-shedding.
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