Posted by sotxbill on January 05, 2023 at 06:50:37 from (172.56.88.179):
In Reply to: Amps vs volts posted by rrlund on January 05, 2023 at 06:36:27:
WELL... its an ohms law situation... the resistance of the battery changes to the charger... as the voltage in the battery rises, the charger will put out less current.. when the voltage is equal, there will be no flow... voltage is the pressure of the two vessels... if one is higher it will flow to the lower pressure vessel... The more the pressure difference, the faster the flow (current). (assumes wire size is big enough) HOWEVER the source has a variable controller or regulator that can change the limit/ vary the total flow rate(current) for safety. This allow it to then charge a battery at lower voltage at a higher FIXED current rate, and then as the battery voltage comes up, it allows it to slowly equalize it...
Now add to that a controller that allows for bulk charging at a higher top voltage say about 14.7 and then switch to a float voltage later of around 13.8 to 13.6 and you have the best of all worlds. Throw in a heat sensor to allow for slightly higher voltage in cold weather vs slight less voltage in hot weather and you now start to get an intelligent system.
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