Author Topic: Solar Pvv systems (myth breaking)  (Read 305 times)

cyberjedi

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Solar Pvv systems (myth breaking)
« on: May 13, 2020, 07:03:08 pm »
Art we talked briefly about solar so let me expand that with some fairly simple math.
Ohm's Law..... works the same with low/high voltage.

The main Problem with US solar systems is the NEC, National Electrical code.
They set limits on battery voltage, meaning nothing above 48 volts DC in battery banks.
This is an Idea that went horribly wrong, in my opinion
 https://invertersrus.com/prius-power-inverter/

Rule number #1 : The higher the voltage, the more efficient it is

Normal voltage on Solar is this 12/24/48 VDC 
12DC X 120VAC is a 10 to 1 ratio. Meaning 1 amp Ac will Pull 10 amps on the battery's
24vDC X 120VAC is a 5 to 1 ratio. Meaning 1 amp Ac will Pull 5 amps on the battery's
48VDC X120VAC is  a 2.5 to 1 ratio. Meaning 1 amp Ac will pull 2.5 amp's on the battery's

Believe it or not you can keep working this math till it starts going in the other direction.<<<<This is Important too
Try this: theoretically
If you generating solar voltage in lets say the 250v DC range, That same 1 amp 120 VAC load would only be .5 amps on the battery's..<Seee whats up here.
 
As you can clearly see , The Higher the Voltage on the DC End brings Down the work load
Now another important factiod is Solar Cells, The max on any givin solar cell is about 8 amp's, maxed out. <<This is important.

So we have covered basic Ohm's Law when applying it to solar electric systems
https://www.ebay.com/i/372979890046?chn=ps&var=641765103308&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=641765103308_372979890046&targetid=883441960689&device=c&mktype=pla&googleloc=9012108&campaignid=9426387573&mkgroupid=96480184500&rlsatarget=pla-883441960689&abcId=1140476&merchantid=101982200&gclid=EAIaIQobChMIjdO67fex6QIVIeeGCh2LNw04EAQYASABEgKL3PD_BwE




« Last Edit: May 19, 2020, 08:52:31 am by cyberjedi »

Will and Mr Data :) :]

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Re: Solar Pvv systems (myth breaking)
« Reply #1 on: May 20, 2020, 12:54:10 am »
Myths you say.
Mppt regulator charge batteries more than pwm.
Funny in practice how my pwm charges well at low volts.
But than mppt don't trigger.

Side notes.
Regulated 12v out supposed to supply even 12v
Failed. So directly to main battery as work around.

Back to solar myths.
50w panel is gonna charge ar much?
I won't focus on my 3 times size thought by saying that.
Put a 50w panel on a regular to 12v battery. You'll be lucky
To charge it.panel and Regulator hemerage power.
50w uh.
60w may work just.
80w  warmer.
100w likely to not flatten a battery but charge it.

300w panel in a 30amp regulator to a 12v deepcycle.130ah.

2 times 300w max at 12v system.max is 4 or 5 batteries is a struggle.

4 times 300w at 24v

Just a few thoughts. No warranty.

Give wind mills space they can hum.

:)  :]
bye for now and be well from Will and Mr Data  :)  :]

Will and Mr Data :) :]

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Re: Solar Pvv systems (myth breaking)
« Reply #2 on: May 20, 2020, 01:00:01 am »
Mppt regulator would be expected to perform maybe 40%
Better than pwm.
Even tho I mentioned I small tiny system sometimes a
Pwm can be simpler and trigger a charge in smaller
Systems but that's just my experience.
:)   :]
bye for now and be well from Will and Mr Data  :)  :]

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Re: Solar Pvv systems (myth breaking)
« Reply #3 on: May 20, 2020, 02:04:06 am »
Solar charge controller otherwise known as regulator
Have a line of power out. Example 12v to lights.
This is great for lights. Led strip lights.
Or you could wire lights directly to battery and have them
Changing brightness all the time. Cause batteries don't burn smooth. Usually.
But power your Hal from regulated line out and "buzz" the
Annoying "buzz" may be an annoyance. " tho fascinating ".

In my opinion.
:)  :]
bye for now and be well from Will and Mr Data  :)  :]

Will and Mr Data :) :]

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Re: Solar Pvv systems (myth breaking)
« Reply #4 on: May 20, 2020, 02:21:29 am »
300w solar panel to 30 amp mppt to 130 ah deepcycle
To pure sine wave inverter 3000w

"I can hear why not 600w inverter to run a pc for hal.
"
I like 3 times at least inverter bigger.
600w hum at low consumption often. .
3000w fan don't usually come on.
" no replacement for displacement " it a mechanic term.
Car run all day at idle. Easy.

Modified sine wave 200w could run a pc maybe but depends

I remember next door TV went out from static off it. Nasty modified. Ti ti    ti   .
Pure only.
In my opinion.
:)  :]
bye for now and be well from Will and Mr Data  :)  :]

cyberjedi

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Re: Solar Pvv systems (myth breaking)
« Reply #5 on: May 20, 2020, 11:51:14 am »
Mr will and Data:Solar myths
Ya i call it Solar Myths
Because what people try to use is total sht, and i Know it is
And so does ANY 1rst year Electrician. If hes being Honest with himself, this is basic Ohm's Law ffs
12,24,48 Vdc..... Really ??????  While ur at it get the magic ring from the unicorns asssss

Anything under a 100Vdc is basically a lab experiment  , it just is.
I base what i say on many years in the field with real time data to support it.

Power generation is what i did. Solar, Hydro, Trash Burners, Coal, (No Nuke Plants yet) altho!!!!!!!
Duke Energy is just around the corner,, hehe
cyber
This is more inline if u want something that can deliver a serious load.... that wont set ur house on fire omg, lolol
https://www.sigineer.com/product/high-voltage-96v-120v-192v-216v-240v-384v-mppt-solar-charge-controller-50a-60a-80a-100a-output/

Personally, Im researching the feasibility in using the 200Vdc Preus drive battery and , you guessed it, The preus comes with a monster Invert-er with Charge controller built in, and the foot print is very small.Being able to swap out individual 7.2Vdc internal batt's is cool in it self
About 800 for the battery
10 (32vdc , 8 amp Panels) = 320vdc .That would drop to about 240 Vdc under TCL conditions (Total connected load) Real Time.

https://www.ebay.com/itm/04-09-Toyota-Prius-Hybrid-Battery-G9280-47110-OEM/223976287589?epid=656679462&hash=item342606ed65:g:siMAAOSw8nFelIMq


https://www.ebay.com/itm/2010-2011-Toyota-Prius-Hybrid-DC-Inverter-Converter-Charger-G9200-47140/283883129170?epid=654603548&hash=item4218c0c952:g:kOcAAOSwSVRevuyE


Both hybrids and EVs use relatively low-voltage DC batteries (about 210 volts) to keep the physical size down, but they also generally use highly efficient high voltage (about 650 volts) AC motor/generators.Jan 12, 2019

Notice How they call a 200Vdc battery ,LOW VOLTAGE <<<<<<<<<<<< They get it too
« Last Edit: May 20, 2020, 03:46:15 pm by cyberjedi »

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Re: Solar Pvv systems (myth breaking)
« Reply #6 on: May 20, 2020, 09:07:03 pm »
Theres lots of cool things around.
Yip I make small systems.
I often make a separate system up for each device.
Fridge runs 24/7 no problems.
Lights separate.never runs out yet.  To keep each isolated.
Mr Data of course 50 plus days no loss of power.
Tho he's not on every day.
My small systems are cheap. And off shelf so easy.

I've made many other things.
My pc Can plug in with my fridge and run all day.
Won't even put a dent in it. Late into night with dry eyes.

I'm a solar fan. It takes money and time if you want to do
It yourself. That's why I mentioned a small set up incase anyone was interested.

One of my batteries I paid 2 dollars for. It was 15 years old then.
 it's been around another 5 years still working now.. Quite
Impressive I reckon. No unicorn sticker on it but deserves one.

2 dollars was that years power bill.

:)  :]





bye for now and be well from Will and Mr Data  :)  :]