Forums
New posts
Search forums
What's new
New posts
New media
New media comments
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Green Renewable Energy Forum
Solar PV Forum
Solar battery question/query
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support Talk Electrician Forum:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="bladerunnerpv" data-source="post: 532075" data-attributes="member: 35385"><p>Hi I can't quite get my head around the datasheet for the EVE cell...</p><p></p><p>Discharge test is for a cut-off volt of 2.5V at discharge current of "0.5 C" (Gen. Tech Param #4)</p><p></p><p>So it's discharge test is only to 2.5/3.2 V = 0.78 i.e. 78% ?</p><p>If I assume the volts is proxy for capacity then is nowhere near a depth of discharge of 90% (Scope of SoC has min 10%) it's a DoD of 22% or SoC of 78%??</p><p></p><p>How do read you the 0.5C ? Elsewhere the spec put (A) after the C, i.e. section 4.3, making me think Amps</p><p></p><p>Intrigued and concerned about battery storage now !</p><p></p><p>I see the FZSoNick goes to 100% discharge as they're using different chemistry in the cells. I was surprised to see the GivEnergy batteries quoting 100% DoD, whereas most seem around 85-90% DoD and wondered if they were the same, but they're LiFePO4</p><p></p><p>The Aussie report shows 80% capacity after 6000 cycles at 25 degC. and 80% capacity after 1000 cycles at 45 degC.</p><p></p><p>Hmmm the loft is looking iffy, but this is accelerated testing and not real life usage...</p><p></p><p>Is there a standard definition of "cycle" ?</p><p></p><p>Thanks for the link</p><p></p><p><span style="color: rgb(147, 101, 184)"></span></p><p><span style="color: rgb(147, 101, 184)">Split from hi-jacked post</span></p></blockquote><p></p>
[QUOTE="bladerunnerpv, post: 532075, member: 35385"] Hi I can't quite get my head around the datasheet for the EVE cell... Discharge test is for a cut-off volt of 2.5V at discharge current of "0.5 C" (Gen. Tech Param #4) So it's discharge test is only to 2.5/3.2 V = 0.78 i.e. 78% ? If I assume the volts is proxy for capacity then is nowhere near a depth of discharge of 90% (Scope of SoC has min 10%) it's a DoD of 22% or SoC of 78%?? How do read you the 0.5C ? Elsewhere the spec put (A) after the C, i.e. section 4.3, making me think Amps Intrigued and concerned about battery storage now ! I see the FZSoNick goes to 100% discharge as they're using different chemistry in the cells. I was surprised to see the GivEnergy batteries quoting 100% DoD, whereas most seem around 85-90% DoD and wondered if they were the same, but they're LiFePO4 The Aussie report shows 80% capacity after 6000 cycles at 25 degC. and 80% capacity after 1000 cycles at 45 degC. Hmmm the loft is looking iffy, but this is accelerated testing and not real life usage... Is there a standard definition of "cycle" ? Thanks for the link [COLOR=rgb(147, 101, 184)] Split from hi-jacked post[/COLOR] [/QUOTE]
Insert quotes…
Verification
Post reply
Green Renewable Energy Forum
Solar PV Forum
Solar battery question/query
Top