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Old 03-24-2016, 03:40 PM   #1 (permalink)
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Ways to recharge deepcycle batterie from alternator delete

In this topic, I discuss and search for an solution/options to recharge the deepcycle batterie to suply your car with electricity.

But sometimes, you don't have time or is the car parked in the wrong spot to recharge it back up.

I have an batteriebank of (yes it is real) 432Ah (20h) 12V.
5184Wh looks like this:


85Ah - 75Ah - 75Ah - 92Ah -105Ah


This is because i cant charge the batterie every day.

I now can run the car for 4 days and the bank is then worst case disscharge to 20% left (average 35 to 40% left).

But then it takes up to 11hours to recharge

So, the search to solutions starts hier!

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Old 03-24-2016, 03:56 PM   #2 (permalink)
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Haha, wow that is quite the brick of lead you got there.

Here are a few ideas:

Solar is easy. It won't provide much and it'll cost a lot though.

Regen is not as easy, but completely doable. Find a way to hook up the alternator while decelerating. Ideally a large alternator so you can recoup as much as possible.

Other more out there ideas that have been talked about:
turbo driven alternator
shock absorbers that generate electricity
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Old 03-24-2016, 04:33 PM   #3 (permalink)
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This is the way to do it if you want something that you know will work:

Solar 12v assist - EcoModder

It charges my battery up fully every day.
http://ecomodder.com/forum/showthrea...els-32752.html
It runs my electrical system, can provide full but limited duration power to a 2000 watt pure sine wave power inverter to power welding and cutting machines tools, I have 12 volt air compressor, electric pumps and all kinds of stuff.

You want to charge the batteries up all the way every day to get the most life out of them.
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Old 03-24-2016, 04:47 PM   #4 (permalink)
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Huge bank, yes.

It 'only' weighs 175kg (385 pounds).

This is helping me with dfco and puls & glide.
The rear is 'lowerd' so better aero on the highway to :P

The coolant heater draws 30A @ 12V
The oil heater draws 8A @ 12V
(round number of 40A)

It is used 2 times a day for 15 minutes.
4 days x 2 times x 15 minutes x 40A = 80Ah

The car uses around 15A ( x 8 x 45 minutes = 90Ah)
The lights draws somewhere around 20A (only 1 times a day x 4 x 45 minutes = 60Ah)

Total of 230Ah

Then i have a 1000W pure sinus inverter and a 750W air heater with fan.
When it freezes (or close to freezing) i use this heater to heat up the cabin so it wont hurt engine warm up time.

I have, to bad, absolutly no ability to recharge every day...
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Previous car. SUV. From 2011+ 10l/100km to 2017 5,516l/100km.
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Old 03-29-2016, 12:09 PM   #5 (permalink)
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Quote:
Originally Posted by Daox View Post
Haha, wow that is quite the brick of lead you got there.

Regen is not as easy, but completely doable. Find a way to hook up the alternator while decelerating. Ideally a large alternator so you can recoup as much as possible.
This is your best bet. Plus make it so whenever you are idiling, it's charging. Gives your engine something to do. Of course, if it's just turned on and off by the brake switch, it'll regen during idle anyway. Unless you use the hand brake/park.

And, yes, as mentioned, there's solar...but you'd have to go big to get enough out of them to get that many amp-hours.

Otherwise, you'd have to figure some means of plugging it in. Even if that means carrying your bike with you so that you can leave it charging at a buddy's house while you go the last few KMs to work(or whatever) every day.
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Old 03-29-2016, 02:56 PM   #6 (permalink)
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Stop using the batteries to heat the coolant and oil. That will save you many Ah right there.

Use solar to keep up with the rest of the demand. It will at least reduce the depth of discharge until you are able to charge again.

Another idea is to use smaller removable batteries and engineer them for easy access. That way you can take them out and charge them indoors and pop them back in.

My last thought is an alternator switch that can be turned on when decelerating.

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