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Battery
#1
Is this a good match for the Renogy 100W suitcase?

https://www.samsclub.com/sams/duracell-a...roduct:1:1
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#2
It depends on how much you plan to draw it down before charging with that 100watt suitcase.
and how much sun you are showing the panels.....
(Gotta get it back to 100% or you wasted your money , ya gonna kill it if you can't)
Stay Tuned
popeye

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#3
(12-31-2017, 02:09 PM)rvpopeye Wrote: It depends on how much you plan to draw it down before charging with that 100watt suitcase.
and how much sun you are showing the panels.....
(Gotta get it back to 100% or you wasted your money , ya gonna kill it if you can't)

Well, I plan to not let it get less than 50% and can also charge it with a regular charger.  Isn't that what I'm supposed to do?
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GaRay (12-31-2017)
#4
The battery you are looking at is a marine battery and is not rated for deep cycle even though it says it is. Check the label and if it stayed cold cranking amps then it is not a deep cycle battery. A deep cycle battery is rated in amp/hours.
Enjoy Life Daily ~
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#5
RV pop eye is correct that you need to charge your batteries to 100 percent as often as possible to prolong the life. That process is called equalization and as described in this link: http://lifelinebatteries.com/2015/10/can...batteries/
Enjoy Life Daily ~
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#6
When you do not know anything , its typical that you can make a lot of wrong choices , and spend too much .
THE VERY 1st THING IN SOLAR , get you numbers together , it's called a site survey - what equipment do you want to run ,
then can you get a more efficient device [ as an example a fridge [ RV fridge's are more efficient [ NO COMPRESSOR ] than like house fridge - does have a compressor " motor " ] .
Then add up all your consumption " watt hours & peak amp's .
Using Ohms law , https://en.wikipedia.org/wiki/Ohm%27s_law .
Now you start planing your system .
Getting something going to help learn , do not spend too much money on stuff ---- as an example https://www.renogy.com/renogy-100-watt-1...-suitcase/ , close to $3 per watt , do not pay more that $1 per watt , better yet $0.30 to $0.80 per watt -
https://www.wholesalesolar.com/solar-panels
Get a small used battery , even a motorcycle battery - in good condition , then a small low cost solar about 5 amp min. about 50 watt .
This is so you get a feel for , and use metering volts & amp , and especially something that can record amp-hours .
Then when you do start spending some money multi $100 sss .
Not using / charging batteries die very quick , maybe weeks , sometimes lasting a couple yrs.
You should get at least 5-8 yrs. , if not 8-15 yrs. out of a battery bank .
It has been for decades - that try to never use solar for any kind of heating , or running any motor .
Some do not like this site [ because there may be some facts in question , but there are more correct / good info , than there is bad ] http://batteryuniversity.com/
Again if you want to say something bad about the battery site , mention the wrong info , then the correct , seems to me that is what we are trying to do , good info , and if you know of a better battery site , that is user friendly , by all means link it .
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#7
There is no "matching" panels to batteries other than size.

Per 100W panel you want at least 50AH, but 100AH handles poor / variable solar conditions better.

Then comes true deep cycling quality.

Deka makes Duracell, and their flooded (FLA) GCs sold at Sam's are fantastic value.

Their AGMs are *not* great, but probably about as good as other generic like Vmax, sold by Renogy. Not what I would call true deep cycle.

The only good quality AGMs in the NA market for that purpose are expensive, like Lifeline, Odyssey, Northstar.

What makes you think you need AGM?

FLA are much more robust, last longer and are cheaper.
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#8
(12-31-2017, 03:57 PM)John61CT Wrote: What makes you think you need AGM?

FLA are much more robust,  last longer and are cheaper.

Thinking AGM because of no water maintenance and sealed.  I already have a renogy 100w suitcase.  Plan to use them minimally and plan my usage around what I have.  Lights, charging and using ipad/iphone.  Using an inverter for macbook.  Fan.
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GaRay (12-31-2017)
#9
When you know more , never use a inverter - AC to DC , losses / inefficient / wasting power .
When you need DC - use DC , so then all you need is a DC voltage converter , lots of ways of doing this , but doing this efficiently gets more involved .
In solar the term power optimizers . - https://en.wikipedia.org/wiki/Power_optimizer

DC to DC converter - https://en.wikipedia.org/wiki/DC-to-DC_converter
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#10
(12-31-2017, 04:35 PM)hausmutti Wrote: Thinking AGM because of no water maintenance and sealed.
To me that reason does not justify the far higher expense per year long term. $180-200 for 200+AH gets you excellent FLA GCs, really can't beat that for value.

Once you have the know-how and gear to really take care of them, quality AGM can last as long as FLA, for some over a decade, but that's not likely for a first bank.

If you buy (relatively) cheap AGM, knowing you may need to replace the bank much more often, that is what many do, your van your call.
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frater secessus (01-01-2018)


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