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Adding an AC coupled battery inverter to existing Grid Tied PV system
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<blockquote data-quote="Bob Minchin" data-source="post: 547508" data-attributes="member: 37123"><p>I'm a retired electrical engineer who hopefully has not lost all his marbles!</p><p>I have a mature Grid Tied Solar PV system all MCS approved and collecting FIT.</p><p>I want to explore the pros and cons of adding AC coupled battery storage.</p><p></p><p>I don't want to lose my MCS/FIT contract</p><p>I don't want battery generated power to be exported to the grid.</p><p></p><p>I do want the batteries to charge automatically from surplus PV power</p><p>I do want the batteries to supply power to the home making the grid "supplier of last resort"</p><p></p><p>I'd hope that the above would be automatically provided by the AC coupled inverter. Is this correct or will only some inverters do this?</p><p></p><p>A very useful added feature in the event of a power cut would be if the battery inverter would satisfy the anti islanding system in the grid tie inverter allowings the PV panels to contribute power to the home. Obviously this would need the grid power to be isolated for all the usual safety requirements. </p><p></p><p>Sorry if these are all obvious questions but It's 10 years plus since I researched PV and I need to play catch up when it comes to battery storage.</p><p>If anyone can point me to background reading then I'd be very grateful.</p><p></p><p>Thank,</p><p>Bob</p></blockquote><p></p>
[QUOTE="Bob Minchin, post: 547508, member: 37123"] I'm a retired electrical engineer who hopefully has not lost all his marbles! I have a mature Grid Tied Solar PV system all MCS approved and collecting FIT. I want to explore the pros and cons of adding AC coupled battery storage. I don't want to lose my MCS/FIT contract I don't want battery generated power to be exported to the grid. I do want the batteries to charge automatically from surplus PV power I do want the batteries to supply power to the home making the grid "supplier of last resort" I'd hope that the above would be automatically provided by the AC coupled inverter. Is this correct or will only some inverters do this? A very useful added feature in the event of a power cut would be if the battery inverter would satisfy the anti islanding system in the grid tie inverter allowings the PV panels to contribute power to the home. Obviously this would need the grid power to be isolated for all the usual safety requirements. Sorry if these are all obvious questions but It's 10 years plus since I researched PV and I need to play catch up when it comes to battery storage. If anyone can point me to background reading then I'd be very grateful. Thank, Bob [/QUOTE]
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Adding an AC coupled battery inverter to existing Grid Tied PV system
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