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Solis 3kW AC coupled Inverter & Fogstar 5.12kWh Rack Battery ?
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<blockquote data-quote="Oldman22" data-source="post: 549807" data-attributes="member: 36003"><p>So 2 months have gone by since my last post on my installation and its benefits. Octopus Flux export was enabled and in July I imported 56kWh and exported 92kWh with just 1 day when there was so little sun I needed to charge at 2-5am to top up the batteries. July's total cost including the standing charge was just £4</p><p></p><p>August started badly with no sun for the first few days I had to import 2-5am to charge the batteries for 6 days then it perked up some and I ended up with 28kWh imported and 100kWh exported and my bill for August was nothing, they owe me £3. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p><p> </p><p>Now winter is on its way and I will need to find my way around low PV generation so need to consider daily 2-5am imports at cheap rate rather than occasional ones.</p><p></p><p>I did try setting the inverter for 2-5am 50A charge (around 3kW) with the batteries at 67% at midnight. By 4.10am the batteries were full 100% but as the inverter was set to charge until 5am the grid covered the house for the remaining period when usually the batteries would have that covered. So there are 2 penalties to pay when grid charging batteries, 1 is the initial hourly rate per kWh and second is the house background usage is going to be fed by the grid for the time set for charging. Luckily the grid charge is lowest cost/unit in this period. </p><p></p><p>IF the sun shines enough during winter days the batteries should be 100% charged by lunchtime and some export will take place to claw back some of the charging costs and on some days I hope to clear the 46p standing charge too.</p><p></p><p>Not played with it enough yet to see of its really useful or not but this utility was brought to my attention by [USER=26649]@Ronski[/USER] </p><p>[URL unfurl="true"]https://garydoessolar.com/utilities/dailymodellingutility/[/URL]</p></blockquote><p></p>
[QUOTE="Oldman22, post: 549807, member: 36003"] So 2 months have gone by since my last post on my installation and its benefits. Octopus Flux export was enabled and in July I imported 56kWh and exported 92kWh with just 1 day when there was so little sun I needed to charge at 2-5am to top up the batteries. July's total cost including the standing charge was just £4 August started badly with no sun for the first few days I had to import 2-5am to charge the batteries for 6 days then it perked up some and I ended up with 28kWh imported and 100kWh exported and my bill for August was nothing, they owe me £3. ;) Now winter is on its way and I will need to find my way around low PV generation so need to consider daily 2-5am imports at cheap rate rather than occasional ones. I did try setting the inverter for 2-5am 50A charge (around 3kW) with the batteries at 67% at midnight. By 4.10am the batteries were full 100% but as the inverter was set to charge until 5am the grid covered the house for the remaining period when usually the batteries would have that covered. So there are 2 penalties to pay when grid charging batteries, 1 is the initial hourly rate per kWh and second is the house background usage is going to be fed by the grid for the time set for charging. Luckily the grid charge is lowest cost/unit in this period. IF the sun shines enough during winter days the batteries should be 100% charged by lunchtime and some export will take place to claw back some of the charging costs and on some days I hope to clear the 46p standing charge too. Not played with it enough yet to see of its really useful or not but this utility was brought to my attention by [USER=26649]@Ronski[/USER] [URL unfurl="true"]https://garydoessolar.com/utilities/dailymodellingutility/[/URL] [/QUOTE]
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Solis 3kW AC coupled Inverter & Fogstar 5.12kWh Rack Battery ?
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