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To add more batteries to solar or not?
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<blockquote data-quote="sjroberts" data-source="post: 543576" data-attributes="member: 36464"><p>Thanks for the thorough reply!</p><p>From looking at the smart meter I use around £4 or 11kw of electric from the grid before 7:30 when the house starts waking up. Around then I start generating a very small amount. </p><p>I do not export back to the grid from this solar system as I already had a 4kw on the property which exports once the solar iboost has heated the hot water tank, I have lots of room for charging more batteries from what I can see. The smart inverters stop generating when battery is full and nothing is drawing. Yesterday 1 of the systems did 20kw more than the other so the room is there for charging extra batteries. </p><p>I think I could charge 2 more batteries which would give me another 12kw of useable power, the question is- is it worth it? I’m roughly guessing that 2 batteries are going to cost £5k if I manage to charge those batteries for 200 days a year (weather dependent and probably being a bit optimistic) then I would save myself £4 a day. That looks to me like it would take around 6 years to break even on the expense. </p><p>How does that look and sound?</p></blockquote><p></p>
[QUOTE="sjroberts, post: 543576, member: 36464"] Thanks for the thorough reply! From looking at the smart meter I use around £4 or 11kw of electric from the grid before 7:30 when the house starts waking up. Around then I start generating a very small amount. I do not export back to the grid from this solar system as I already had a 4kw on the property which exports once the solar iboost has heated the hot water tank, I have lots of room for charging more batteries from what I can see. The smart inverters stop generating when battery is full and nothing is drawing. Yesterday 1 of the systems did 20kw more than the other so the room is there for charging extra batteries. I think I could charge 2 more batteries which would give me another 12kw of useable power, the question is- is it worth it? I’m roughly guessing that 2 batteries are going to cost £5k if I manage to charge those batteries for 200 days a year (weather dependent and probably being a bit optimistic) then I would save myself £4 a day. That looks to me like it would take around 6 years to break even on the expense. How does that look and sound? [/QUOTE]
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