Generator to recharge deep cycle battery

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fernley1
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Re: Generator to recharge deep cycle battery

Postby fernley1 » Thu Apr 07, 2016 8:46 pm

I also run a Champion 2000 watt generater on the playa, so far so good for 3 years.
But from fellow burner reviews, if I was to get a new one, it would be a Honda.

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Jenifersteppat
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Re: Generator to recharge deep cycle battery

Postby Jenifersteppat » Fri Apr 08, 2016 7:54 pm

Reading all the praise about the Honda generators is making me feel better. Last year we ran two of the smaller Yamahas together and had a few problems. We invested in a Honda EU3000IS. The price tag made my toes curl a little, but we do a lot of other camping and charge electric bikes etc. so it will get a lot of use off playa. Now I will try to relax and enjoy it knowing we made good investment.
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BBadger
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Re: Generator to recharge deep cycle battery

Postby BBadger » Fri Apr 08, 2016 8:58 pm

I also like how the EU3000is is actually quieter than the smaller EU2000ui.
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Captain Goddammit
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Re: Generator to recharge deep cycle battery

Postby Captain Goddammit » Fri Apr 08, 2016 9:09 pm

I often run both EU2000s when only one would handle the load because two idling units sound nicer than one throttled up set.
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Jenifersteppat
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Re: Generator to recharge deep cycle battery

Postby Jenifersteppat » Fri Apr 08, 2016 9:37 pm

It is soooo quiet.
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Captain Goddammit
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Re: Generator to recharge deep cycle battery

Postby Captain Goddammit » Sat Apr 09, 2016 8:43 am

Have you heard how quiet the newest diesel pickup trucks are? Amazing.
These Honda "EU" generators have been on the market about 15 years, essentially unchanged. I wonder how quiet the next ones will be?!!
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WileE13
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Re: Generator to recharge deep cycle battery

Postby WileE13 » Sun Apr 17, 2016 10:08 am

Get a battery tender, plug it to the battery, and everytime the genny goes on, it charges the battery. Then, use 12v LED lights off the battery. Don't use an inverter for lights, it is terribly inefficient to go from 120 AC out of the genny, to 12v DC at the battery, then back to AC for the lights. Inverters/Converters have an efficiency loss.

One deep cycle marine battery should put out 300 watts for lighting all night. We ran about 100 watts for lighting off one, and it lasted almost all week. We charged it maybe twice, and I'm not sure how much it even needed it.

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Captain Goddammit
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Re: Generator to recharge deep cycle battery

Postby Captain Goddammit » Sun Apr 17, 2016 10:37 am

That's heavily flawed advice. It's actually just plain wrong.
"Battery Tenders" are very low-power trickle chargers intended to maintain batteries during periods of storage. They charge at around 1 amp. If you ran your generator for ten hours you'd only recover 10 amp hours, and that's assuming full output. That wouldn't even keep the battery charged if you ran it 24 hours a day if you were using 100 watts of lighting for even four hours a night.

One deep cycle marine battery will absolutely NOT put out 300 watts all night!
Those are generally in the neighborhood of 100 amp-hour capacity.
300 watts at 12 volts requires 25 amps. 25 amps for two hours is 50 amp-hours, about all you've got.
You only really have about half a battery's rated capacity usable. Once it's below about 50% charge you're done.
You would only make it four hours even if you could really use all 100 amp-hours - which you can't.
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WileE13
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Re: Generator to recharge deep cycle battery

Postby WileE13 » Sun Apr 17, 2016 10:54 am

100 amp hour battery is pretty small, I'm used to industrial/farm size batteries.

Sorry about the "tender" comment. We use battery charger/tenders which I refer to as "tenders" when they are passively maintaining a battery while stationed, not being actively fast charged to be used in say a piece of equipment.

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Captain Goddammit
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Re: Generator to recharge deep cycle battery

Postby Captain Goddammit » Sun Apr 17, 2016 11:49 am

Well you get around 250 amp hours from a huge 8D industrial size battery, and it weighs 140 pounds. (I work with big equipment too.)
That ought to be enough to run 300 watts of light for five hours, still not exactly all night.
You'd need a very powerful charger to replace all that electricity in say ten hours of generator running time.
GreyCoyote: "At this rate it wont be long before he is Admiral Fukkit."
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badscr
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Re: Generator to recharge deep cycle battery

Postby badscr » Wed Jul 26, 2017 3:58 pm

Regardless of Set up.

When charging a battery/battery bank from a Generator:
Only Charge to 80% Capacity of bank any further charging is a complete wast of Fuel.
(In other words: a generator is only good for the Bulk Charge Phase of a battery)

if you want to charge the last 20% (aka the Absorption Charge phase & then the Float Charge) Then use Solar panels


Definitely the Quiet Generators are the only generators to run. But those Champion, Honda, and the Cheap POS loud Generators have a limited life span of about 400 Hours.

If you can: look for a used Onan or cummins Generator (New is $5000+) (maybe need to repair) they are fairly quite and build to last long time. For comparison 400 Hours is barely past the break-in period.
My Onan 5Kw cost me $900 used and it needed a new carburetor $200 = $1100

PS:
Keep in mind about All Generators: the higher the altitude the less power output. also propane/natural gas the less power output. and the two do combine. so it is possible to have a 5000Watt generator that can only output a useable 1000 watts :shock:

DC to AC you will lose 15%+ from an Inverter. So, that 100 Watt Load is costing you 115 Watts of power


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