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"Certainly not a solar expert, but I know batteries have a fairly short life cycle for their relatively high unit cost, which is why some people have looked at using an air compressor for energy storage. Solar power runs a special compressor through the day and then it's released to drive a genny after dark. You'll have to dig round for how well this system works though. If you're looking for efficient heating/cooling as your main saving, look at the air source heat pump systems. Rather pricey to install so you need to be in a house that you'll stay in long term or that will support the higher sale cost to recoup the investment at sale time but the efficiency is in the 90% window last time I looked into them (assuming you have a well insulated house) and the running cost for the average 3 bed was less than £100 pa" We looked into this however at the time if you were on gas mains then you didn't get the right grants to make it worth while. Not sure if those grants still exist. The main problem we found was not only would we be buying the system it was the difficulties fitting into a house with no water tank as on gas central heating etc. However we are looking at changing the boiler in a couple of years anyway... so at that point we would revisit this and see if it was worth it for our heating system. I'm going to guess not as we mainly heat through the multi fuel stove so our gas usage is low anyway. I really want this to be worth while though. Much prefer the idea of almost off grid... almost | |||
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"Hi guys After some advice / feedback We are looking @ putting in a 4kw solar panel system We have been surveyed and all is good south facing roof no shading etc The company is offering a battery back up system so that we can use free power in the evenings when the panels are not generating any power So in essence let's say we generate 4kw per hour in good conditions average day light in summer approx 10 equates to 40kwh Some will be exported back to the grid after the 5kw batteries have been topped up then in the evening we use the electric stored in the battery any guys know anything ref solar & lion batteries ? Appreciate any help / advice " . I've got a 12 kW system that I installed myself about 6 years ago, works great, never had any problems,i think I've only paid for electric twice in those 6 years. Didn't bother with the battery system for various reasons from cost, cycle life, storage capacity... Never felt it worth it! But they've come on a bit since I did mine. I've also got grey water system, source pumps, solar water... initial cost was quite high but we were completely rebuilding the house at the time and we've never had a utility bill in six years. And that's a great selling point to if we ever decide to sell | |||
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"The air source pump lives outside and is usually about the size of an aircon unit or small fridge and works in a similar way to a fridge using heat exchange- with the added bonus of being able to reverse the flow so you can swap hot for cold in the 2 days of British summer " . I've got mine in the loft, well insulated to the house and lots of air vents, works brilliant | |||
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"Hi guys After some advice / feedback We are looking @ putting in a 4kw solar panel system We have been surveyed and all is good south facing roof no shading etc The company is offering a battery back up system so that we can use free power in the evenings when the panels are not generating any power So in essence let's say we generate 4kw per hour in good conditions average day light in summer approx 10 equates to 40kwh Some will be exported back to the grid after the 5kw batteries have been topped up then in the evening we use the electric stored in the battery any guys know anything ref solar & lion batteries ? Appreciate any help / advice " Search for some books by a guy called Mike Boxwell. He has written plenty of information about solar power. I used to work with this bloke and he is mad but a bloody genius when it comes to this stuff. | |||
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