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Battery only storage - Worth it?
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<blockquote data-quote="johnb2713" data-source="post: 547136" data-attributes="member: 35153"><p>I have done both over the last year - solar + battery and an additional battery and inverter. The solar and battery is brilliant when the weather is good and about as much use as a chocolate teapot during winter. My standalone battery and inverter is easy to calculate the cost savings. 21kWh usable, so that gets charged from grid if you dont have solar, peak electricity is £0.38, off peak is £0.075 therefore a saving of £0.305. 21kWh @ £0.305 = £6.40 per day. Fogstar batteries are £1350 for 5kWh so 4 of those would give you 20kWh, a 5kW inverter would be circa £1000, total cost of a system like this £6400, payback 2.75 years.</p><p>Obviously the size of battery can be reduced with appropriate savings in cost, a 10kWh system would be £3700, payback would be 3.3 years based on the same figures.</p><p>If I had my time over again, I wouldn't bother with the solar PV.</p></blockquote><p></p>
[QUOTE="johnb2713, post: 547136, member: 35153"] I have done both over the last year - solar + battery and an additional battery and inverter. The solar and battery is brilliant when the weather is good and about as much use as a chocolate teapot during winter. My standalone battery and inverter is easy to calculate the cost savings. 21kWh usable, so that gets charged from grid if you dont have solar, peak electricity is £0.38, off peak is £0.075 therefore a saving of £0.305. 21kWh @ £0.305 = £6.40 per day. Fogstar batteries are £1350 for 5kWh so 4 of those would give you 20kWh, a 5kW inverter would be circa £1000, total cost of a system like this £6400, payback 2.75 years. Obviously the size of battery can be reduced with appropriate savings in cost, a 10kWh system would be £3700, payback would be 3.3 years based on the same figures. If I had my time over again, I wouldn't bother with the solar PV. [/QUOTE]
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Battery only storage - Worth it?
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