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
Campers, Vans & 4WD's
Motorhome Solar Power System Issue
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="blisters" data-source="post: 242893" data-attributes="member: 4992"><p>I'm not following this bit as resistance is in ohms, resistances in parallel decreases the overall resistance which at any voltage will increase the respective overall current as resistors (batteries) are added in parallel.</p><p></p><p>The combined resistance of three identical batteries in parallel will be one third the resistance of one of the batteries.</p><p></p><p>In regards to the algorithm I think we are saying the same thing as follows?</p><p></p><p>I haven't dealt with the latest chargers but the ones I built did the following:</p><p>BULK</p><p>Constant current until the threshold voltage is reached e.g 15v. Then it changes to absorption.</p><p>ABSORPTION</p><p>Constant voltage e.g 15v until the current reduces to a predefined level and it switches to float.</p><p>FLOAT</p><p>Float keeps the battery at a voltage to maintain charge e.g 13.8v</p><p></p><p>The thing is a battery is a variable resistor. As it charges the resistance increases so in bulk mode at a constant charging current the battery voltage increases proportionally to the increase in battery resistance. In absorption mode the voltage is kept constant so as the battery resistance increases the charging current decreases. In float mode the charging voltage is constant to maintain charge.</p><p></p><p>Jon</p></blockquote><p></p>
[QUOTE="blisters, post: 242893, member: 4992"] I'm not following this bit as resistance is in ohms, resistances in parallel decreases the overall resistance which at any voltage will increase the respective overall current as resistors (batteries) are added in parallel. The combined resistance of three identical batteries in parallel will be one third the resistance of one of the batteries. In regards to the algorithm I think we are saying the same thing as follows? I haven't dealt with the latest chargers but the ones I built did the following: BULK Constant current until the threshold voltage is reached e.g 15v. Then it changes to absorption. ABSORPTION Constant voltage e.g 15v until the current reduces to a predefined level and it switches to float. FLOAT Float keeps the battery at a voltage to maintain charge e.g 13.8v The thing is a battery is a variable resistor. As it charges the resistance increases so in bulk mode at a constant charging current the battery voltage increases proportionally to the increase in battery resistance. In absorption mode the voltage is kept constant so as the battery resistance increases the charging current decreases. In float mode the charging voltage is constant to maintain charge. Jon [/QUOTE]
Verification
Post reply
Outdoor & Recreation
Campers, Vans & 4WD's
Motorhome Solar Power System Issue
Top