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Discussion Starter · #1 ·
Does anyone know the actual fact of how many miles or how much time it takes to recharge the battery after starting the vehicle that has a fully charged battery before the start.

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Too many variables here. When the vehicle is being driven, are the lights on? The rear window defroster? The a/c? Wipers? All of that affects the outcome you are looking for.

Honda's have a variable-output alternator. Using a thing called an electrical load detector (ELD), the alternator varies the output based on need. If all of those things are on, the ELD senses a drop in current so it tells the alternator to provide maximum output. If none of them are on, it calls for minimum output. All to give you .001 more MPGs.
 

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2017 CRV Touring - Pearl White w Black Interior
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As already noted by others here.. it is not possible to answer your question. Simply too many variables at play.. including ambient temperature.

Thing is.. you can answer this question yourself if you simply plug one of those low cost voltage displays into the 12vdc power socket. Here is the one I use, but there are many to choose from: https://www.amazon.com/LIHAN-Charge...ug+in+12v+battery+meter&qid=1586978827&sr=8-4 This one has the side benefit of giving you two 2.4A smart charging USB ports as well. :)

This way.. you can monitor your actual voltage on the battery in real time as you drive. When the battery is charging, it will read 14.2-14.5 vdc. When the battery is fully charged, the charging system drops down into low charge mode (which is actually.. small discharge mode.. to get a little better fuel economy) and will read 12.4.12.6 vdc. As you drive, you will see the voltage cycle back and forth between these two readings.. as the charging system constantly adjusts to the needs of the battery needing to be topped up.

This way, you can profile and characterize your specific vehicle and driving conditions to arrive at a real answer for your particular vehicle. :)

Note: you can only detect battery voltage through the 12 plug when your vehicle is powered on... because Honda shuts down the voltage to the plug when you turn off your vehicle. So.. you can not use it for a spot check of battery voltage level with the vehicle off.
 

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Discussion Starter · #5 ·
As already noted by others here.. it is not possible to answer your question. Simply too many variables at play.. including ambient temperature.

Thing is.. you can answer this question yourself if you simply plug one of those low cost voltage displays into the 12vdc power socket. Here is the one I use, but there are many to choose from: https://www.amazon.com/LIHAN-Charge...ug+in+12v+battery+meter&qid=1586978827&sr=8-4 This one has the side benefit of giving you two 2.4A smart charging USB ports as well. :)

This way.. you can monitor your actual voltage on the battery in real time as you drive. When the battery is charging, it will read 14.2-14.5 vdc. When the battery is fully charged, the charging system drops down into low charge mode (which is actually.. small discharge mode.. to get a little better fuel economy) and will read 12.4.12.6 vdc. As you drive, you will see the voltage cycle back and forth between these two readings.. as the charging system constantly adjusts to the needs of the battery needing to be topped up.

This way, you can profile and characterize your specific vehicle and driving conditions to arrive at a real answer for your particular vehicle. :)

Note: you can only detect battery voltage through the 12 plug when your vehicle is powered on... because Honda shuts down the voltage to the plug when you turn off your vehicle. So.. you can not use it for a spot check of battery voltage level with the vehicle off.
Thanks, this is great info

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