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Solar and battery storage option


I have had a few quotes, and as much as I like the Tesla (or similar) battery solution, I cannot see enough advantages for this as it significantly increases the ROI. I have a west-east-facing roof with a little shade from surrounding trees. One quote that I am interested in is 12x 435 Jinko Panels with 12 tigos, 2x 5.12 SunSync batteries, and a SunSync 5kw invertor. This includes relevant certification, scaffolding and bird barriers. I use around 4000kw a year. The estimate is for around £10500.
My questions are around the SunSync solution – there are so many to consider? How do you feel about the cost of this system? Thank you for any feedback you might offer over this.
Comments
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I'm considering a Sunsynk hybrid inverter because you can power-cut proofing, with the addition of a suitable contactor and additional earth.
A cheaper alternative, but with virtually identical spec to the Powerwall, is the Givenergy All-in-One and Gateway.0
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