RV and vandwellers wiki

User Tools

Site Tools

Trace:
electrical:12v:directcharginglfp

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision 		Previous revision
Next revision Both sides next revision
electrical:12v:directcharginglfp [2022/09/17 18:24]
frater_secessus [assessing your own setup for direct alternator charging] 		electrical:12v:directcharginglfp [2022/09/17 18:25]
frater_secessus [assessing your own setup for direct alternator charging]
Line 183: Line 183:
  
   * you **already own a DC-DC**    * you **already own a DC-DC** 
-  * you **need consistent, predictable charging**, like 40A over the next hour.  DC-DC will provide this((barring interference from big chassis loads, BMS protections, high ambients, etc));  isolator charging starts out high and drops linearly.  You might learn its behavior over time, but it will never be as easy as "40A for 1.5 hours = 60Ah". +  * you **need consistent, predictable charging**, like 40A over the next hour.  DC-DC will provide this((barring interference from big chassis loads, BMS protections, high ambients, etc));  isolator charging starts out high and drops as battery voltage rises.  You might learn its behavior over time, but it will never be as easy as "40A for 1.5 hours = 60Ah". 
   * you **don't want to think about the battery**.  DC-DC will either stop charging (Renogy) or drop to float (all others) when charging is complete.  Isolators need to be switched off after charging, if you are driving long enough to fully charge the bank.   * you **don't want to think about the battery**.  DC-DC will either stop charging (Renogy) or drop to float (all others) when charging is complete.  Isolators need to be switched off after charging, if you are driving long enough to fully charge the bank.
-  * choosing wiring can require some effort+  * **choosing wiring** can require some research
     * [[electrical:12v:alternator#wiring_for_the_isolator|with DC-DC chargers wire sizing is straightforward]]:  charger output rating + 20% to account for DC-DC conversion overhead     * [[electrical:12v:alternator#wiring_for_the_isolator|with DC-DC chargers wire sizing is straightforward]]:  charger output rating + 20% to account for DC-DC conversion overhead
     * **if isolator wiring is already present** from a previous bank, test it while using a monitor or BMS info to watch actual current.  You may want to decrease fusing to equal the actual wire rating((rather thant he usual rating + 20%)) during testing.     * **if isolator wiring is already present** from a previous bank, test it while using a monitor or BMS info to watch actual current.  You may want to decrease fusing to equal the actual wire rating((rather thant he usual rating + 20%)) during testing.
electrical/12v/directcharginglfp.txt ยท Last modified: 2024/06/20 18:12 by frater_secessus

Page Tools

affilliate disclosure | the RVwiki runs on a virtual server from Phanes

Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Noncommercial-Share Alike 4.0 International
CC Attribution-Noncommercial-Share Alike 4.0 International Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki