Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Registered members
Current visitors
Charts
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Outdoor & Recreation
Camping
Connecting panel and appliance to battery gator clamps
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 Prospecting Australia:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="condor22" data-source="post: 626415" data-attributes="member: 1932"><p>The biggest issue charging a LiFePo4 from solar is voltage!</p><p></p><p>First thing in the morning or on a really overcast day, the panel/s output voltage may not reach the minimum voltage required to charge. Yes, the battery has an internal BMS which regulates the battery's charge/discharge. Protecting the battery from over discharge and over charging are it's primary function.</p><p></p><p>So, if you are all connected up with solar going in and fridge drawing power out, you won't really know the state of charge (SOC) without a battery monitor, which measures power in and out, then calculates the net SOC.</p><p></p><p>Unlike an AGM, a Lithium has a relatively constant voltage between approx. 10% SOC and 90% SOC, so a simple voltmeter won't be of much use until your battery is getting pretty low.</p><p></p><p>A few Lithium batteries have a LED indicator that has 4 lights showing 100%, 75%, 50% and 25% SOC. Even that is only a guide, but better than nothing.</p><p></p><p>Bottom line, know what you are using (fridge) and replacing (solar) and keep tabs - More solar is better than just enough - MPPT will maximise voltage, PWM won't. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="condor22, post: 626415, member: 1932"] The biggest issue charging a LiFePo4 from solar is voltage! First thing in the morning or on a really overcast day, the panel/s output voltage may not reach the minimum voltage required to charge. Yes, the battery has an internal BMS which regulates the battery's charge/discharge. Protecting the battery from over discharge and over charging are it's primary function. So, if you are all connected up with solar going in and fridge drawing power out, you won't really know the state of charge (SOC) without a battery monitor, which measures power in and out, then calculates the net SOC. Unlike an AGM, a Lithium has a relatively constant voltage between approx. 10% SOC and 90% SOC, so a simple voltmeter won't be of much use until your battery is getting pretty low. A few Lithium batteries have a LED indicator that has 4 lights showing 100%, 75%, 50% and 25% SOC. Even that is only a guide, but better than nothing. Bottom line, know what you are using (fridge) and replacing (solar) and keep tabs - More solar is better than just enough - MPPT will maximise voltage, PWM won't. :) [/QUOTE]
Verification
Post reply
Outdoor & Recreation
Camping
Connecting panel and appliance to battery gator clamps
Top