battery bank and solar panels

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Postby robocop » Fri Mar 24, 2017 11:15 am

Hi everybody

Thanking you in advance for your help

Robert
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battery bank and solar panels

Postby robocop » Fri Mar 24, 2017 11:33 am

Hi friends

For a battery bank of 48v 800ah how many bateries minimum and how many panels 300-340w a piece .

Thinking of a 48vdc 4000-5000w inverter


Are there also 24 v batteries or 400ah batteries?
awaiting your advice

blessings

Robert
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Re: battery bank and solar panels

Postby Gordon-Loomberah » Fri Mar 24, 2017 12:22 pm

Welcome to the Energy Matters Forums Robert :)

It isn't really possible to say how many batteries or panels you might need without other information, such as your daily energy consumption, what sort of battery you plan to use, whether or not you have a generator, maximum expected load, typical weather patterns, etc.

Batteries are made of cells, so with Lead-acid you would use 12 X 2V cells to make a 24V battery, or with Lithium chemistry, you would use 8 cells to make your 24V (actually ~ 26V) battery, or 16 to make a 52V battery.
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Re: battery bank and solar panels

Postby Warpspeed » Fri Mar 24, 2017 12:56 pm

Hi Robert.
I am going through all of this myself right now, and its a complex problem that needs to be thoroughly investigated.

I suppose the very first thing to do is monitor your power usage pattern, and measure the actual power consumption of every single load in your home. You might be amazed at what you discover.

For me it was possible to HALVE my total power consumption by replacing just a few energy hogs with something a bit more clever. I could go into a lot more detail with that if you are interested.

But for a fairly small outlay I now require only half as many solar panels, batteries and inverter to keep up the power. A huge saving.

Next monitor your daily power usage for at least a year, especially through mid winter. The inverter has to be able to carry peak load, and with a bit of planning and consideration for the "system" your peak loads can be reduced.

You need to come up with three figures. Peak Kw demand, Kwh of usage through the day, and Kwh usage at night. Only then can you decide how best to spend your money to get the system that best suits your needs.
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Re: battery bank and solar panels

Postby robocop » Fri Mar 24, 2017 7:12 pm

ok good people good day for you

intention is to use two inverter airco onwe with 2000w the other about 1000w.

the intention is about 4 hour a day consumtion and in the weekend let s say for 8 hours,

inverter 4000w - 5000w continious is more than enough . surge is about 8000-10000 w.

thinking about tu use with panel and batteries only, Grid is only as reserve posibility if needed.

panels 300-340 w each

Are there 24 v batteries or 300ah batteries?

thnks to you all

Robert
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Re: battery bank and solar panels

Postby davidg » Fri Mar 24, 2017 9:56 pm

robocop wrote:intention is to use two inverter .................................... Are there 24 v batteries or 300ah batteries?

???????????

Would you be so kind as to make this a lot clearer

What are the brands of products you are thinking of using?
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Re: battery bank and solar panels

Postby robocop » Sat Mar 25, 2017 12:53 am

I mean inverter airconditioning one of 2000w one of 1000w nergy consuming

I asked if there exists 24 v gel deep cycle batteries

also do they make 300ah deep cycle batteries?
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Re: battery bank and solar panels

Postby davidg » Sat Mar 25, 2017 6:41 pm

robocop wrote:I mean inverter airconditioning one of 2000w one of 1000w nergy consuming

Are we talking about Air conditioning or battery inverters

I asked if there exists 24 v gel deep cycle batteries ............. NO. However batteries are made up of cells, if you expect to do an off-grid system properly then cells are used rather than pre-assembled batteries. they typically have a far greater cycle life.

also do they make 300ah deep cycle batteries?[/quote]
300, 400, 500, 600 and so on upto around 3200ah approx for cells, but you also have to state what the period of time is, as depending on the brand it could based on any of the following C5, C10, C100 or C120 rate in hours when comparing batteries or cells without knowing the rate it's a bit like comparing apples with oranges.
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Re: battery bank and solar panels

Postby robocop » Sat Mar 25, 2017 7:44 pm

I am refering to INVERTER AIR CONDITIONING as there energy intake is lower than conventional air conditioniers
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Re: battery bank and solar panels

Postby davidg » Sun Mar 26, 2017 1:07 pm

robocop wrote:I am refering to INVERTER AIR CONDITIONING as there energy intake is lower than conventional air conditioniers

Great, they dont typically run directly from batteries( DC only), you then require a suitable battery inverter.

The system must produce "mains AC" first, unless you can obtain a DC based air conditioner, extremely rare indeed and vastly more expensive due exetremely low volume production, if there still available at all.
Off-grid/Hybrid System Specialist - Store Sun to use later- I Do!
SELECTRONIC SPMC-482 7.5kW, 8.2kW's of Arrays
AC-Coupled Grid-Connect Inverters,
2100Ah 48V Bank

Auto Backup Genset
PVOutput Stats

Sparkys light up your life :)
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