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Old 09-06-2018, 12:05 PM   #1
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Alternatir to battery charger

Can anyone direct me to that thread that talks about tapping my alternator to keep my solar battery bank charged?
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Old 09-06-2018, 12:08 PM   #2
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What is the voltage of your battery bank?

I am going to use something like this:

https://www.invertersupply.com/index...RoCZyIQAvD_BwE

They make them in 25,40and 70 amps versions and allow charging a 24 volt battery bank from a 12 volt source.
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Old 09-06-2018, 12:09 PM   #3
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12 volt. I'm on a 30 amp charge controller
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Old 09-06-2018, 12:18 PM   #4
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Then an isolator like this:
https://www.victronenergy.com/batter...tery-isolators

Will do the job.
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Old 09-06-2018, 12:57 PM   #5
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It will allow me to run my invertor while driving? I need it to charge fast, but not when the bank is low. Then it needs to charge slower.
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Old 09-06-2018, 01:21 PM   #6
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Originally Posted by Dead pirate View Post
It will allow me to run my invertor while driving? I need it to charge fast, but not when the bank is low. Then it needs to charge slower.
Depends on the alternator, wiring and inverter.

Lots of variables. Hard to answer without more information.

One thing to keep in mind, if you want your batteries to last, you need to charge you need to charge them carefully. Not too fast (boil electrolyte) or too slow (sulfating).

A great resource for solar, battery/charging and inverter information is: www.solarplneltalk.com

Two of my favorites:

https://www.solarpaneltalk.com/forum...your-batteries

https://www.solarpaneltalk.com/forum...-size-tutorial
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Old 09-06-2018, 02:38 PM   #7
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I'm familiar with most of that information. I'm just trying to run my 2000w invertor (full wave) with my alternator. Some kind of voltage regulator is called for.
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Old 09-06-2018, 02:42 PM   #8
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I'm trying to look it up, but without the right nomenclature all i get is how to test your voltage regulator or alternator
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Old 09-06-2018, 05:11 PM   #9
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I'm familiar with most of that information. I'm just trying to run my 2000w invertor (full wave) with my alternator. Some kind of voltage regulator is called for.
I keep typing and erasing my reply. What I am really trying to say, in the nicest way, if you were familiar with "most of that information" you probably would not have asked that question. Do me a favor and at least read: https://www.solarpaneltalk.com/forum...-size-tutorial

To start with, I would not recommend running a 2000 watt inverter on 12 volts.

If you apply Ohm's law you will find that a 2000 watt inverter, at full load, will draw at least 167 Amps.

How long are the cables going to be between your chassis battery and the inverter? Max distance, if you run 00 cable, is about 20'.

What is your alternator rated at?

What do you need a "voltage regulator"? I am assuming that your existing alternator has one already.

By "full wave" I am guessing that you mean "Pure Sine Wave". Is that correct?
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Old 09-06-2018, 05:44 PM   #10
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I was trying to be brief, but i will elaborate. My battery bank is located right next to the invertor (maybe 12 inches) I am using 10 g wires.
Im am not intending to go from my chassis batteries. I am planning on coming directly from the alternator. Which is rated at 260 amps.
I used the term voltage regulator incorrectly. Probably why i was having a hard time googling the appropriate item. I should have used the (?) Symbol.
Pure sine wave. Hahahaha. Not modified.
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