Do I Need an External Alternator Voltage Regulator if I Have Battery Isolator on My Boat ?

Question:

Hi Jeff, love your videos - thanks! I am curious, do I need an external alternator voltage regulator If I have battery isolator on my boat? - Amir

Answer:

A battery isolator only shares a battery voltage and the internal or external regulator controls the alternator output voltage. You always need a regulator (either internal “dumb” or external “smart) for your alternator. - Jeff

Can I Use an External Regulator With Any Marine Alternator?

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Can I Use an External Regulator With Any Marine Alternator?

How To: Marine Electrical Seminar – External Regulator - Episode 6

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How To: Marine Electrical Seminar – External Regulator - Episode 6

How To: Marine Electrical Seminar - External Regulator Troubleshooting - Episode 23

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How To: Marine Electrical Seminar - External Regulator Troubleshooting - Episode 23

External Regulator Explained: Marine Alternator Control & Battery Charging - PYS Tech Talk

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External Regulator Explained: Marine Alternator Control & Battery Charging - PYS Tech Talk

Tips - Installing an External Regulator on a Boat

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Tips - Installing an External Regulator on a Boat

Improve your Alternator Charging with an External Regulator

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Improve your Alternator Charging with an External Regulator

Can I Use One Alternator to Charge an Flooded Lead Acid Starter Battery and an AGM House Battery?

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Can I Use One Alternator to Charge an Flooded Lead Acid Starter Battery and an AGM House Battery?

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How Do I Charge Two Separate Batteries With One Alternator?

Live Stream with Jeff Cote - March 21, 2021

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Live Stream with Jeff Cote - March 21, 2021

How To: Marine Electrical Seminar - Alternator Troubleshooting - Episode 22

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How To: Marine Electrical Seminar - Alternator Troubleshooting - Episode 22

How To: Marine Electrical Seminar - Troubleshooting Alternators & External Regulators - Episode 11 of 12

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How To: Marine Electrical Seminar - Troubleshooting Alternators & External Regulators - Episode 11 of 12

How Do I Increase My Alternator Output to Charge My Batteries Faster?

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How Do I Increase My Alternator Output to Charge My Batteries Faster?

Your Alternator is OVERHEATING Because of Your Lithium Batteries! | PYS TECH TALK

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Your Alternator is OVERHEATING Because of Your Lithium Batteries! | PYS TECH TALK

Is a Lithium Battery Upgrade a Weekend Project for Your Boat?

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Is a Lithium Battery Upgrade a Weekend Project for Your Boat?

How To: Marine Electrical Seminar - Battery Isolator Troubleshooting - Episode 28

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How To: Marine Electrical Seminar - Battery Isolator Troubleshooting - Episode 28

How To: Marine Electrical Seminar - Batteries Continued – Episode 2 of 12

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How To: Marine Electrical Seminar - Batteries Continued – Episode 2 of 12

Charging Lithium Batteries with My Boat's Alternator

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Charging Lithium Batteries with My Boat's Alternator

I Am Upgrading My Alternator, How Will This Affect My AGM Batteries?

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I Am Upgrading My Alternator, How Will This Affect My AGM Batteries?

What Is the Best Setup for Charging Multiple Battery Banks From an Alternator?

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What Is the Best Setup for Charging Multiple Battery Banks From an Alternator?

Dock Talk with Jeff Cote and Nigel Calder - Part 2 of 2

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Dock Talk with Jeff Cote and Nigel Calder - Part 2 of 2