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Justifying adding batteries ????????
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<blockquote data-quote="Murdoch" data-source="post: 549910" data-attributes="member: 24445"><p>So we have have had PV for nearly 4 years and a immersion divertor - all works well.</p><p></p><p>So I've been pondering about adding battery storage - which will mean changing the inverter and adding the batteries - approx cost £3000</p><p></p><p>Current lecky cost is about £0.30 per kwh</p><p></p><p>If I do this and work the calculations on ONLY charging from the spare PV and setting the priority to the batteries it'll be about 10k kwh hours to break even. Realistically I don't think there is enough sun in the winter to charge the batteries unless there is a really sunny day or 2!</p><p></p><p>Our imported consumption is about 3000 kwh per year</p><p></p><p>So even if I could "assume" I'd get enough battery charge for 1/2 the year it would take about 7 years to break even if I don't take into account the "loss" of the free hot water we are currently getting.</p><p></p><p>So why are so many people rushing to install this kit ? and a lot of them using off peak lecky to charge their batteries?</p><p></p><p></p><p>Are my assumptions way off or am I missing something?</p></blockquote><p></p>
[QUOTE="Murdoch, post: 549910, member: 24445"] So we have have had PV for nearly 4 years and a immersion divertor - all works well. So I've been pondering about adding battery storage - which will mean changing the inverter and adding the batteries - approx cost £3000 Current lecky cost is about £0.30 per kwh If I do this and work the calculations on ONLY charging from the spare PV and setting the priority to the batteries it'll be about 10k kwh hours to break even. Realistically I don't think there is enough sun in the winter to charge the batteries unless there is a really sunny day or 2! Our imported consumption is about 3000 kwh per year So even if I could "assume" I'd get enough battery charge for 1/2 the year it would take about 7 years to break even if I don't take into account the "loss" of the free hot water we are currently getting. So why are so many people rushing to install this kit ? and a lot of them using off peak lecky to charge their batteries? Are my assumptions way off or am I missing something? [/QUOTE]
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Justifying adding batteries ????????
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