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i need solar power ?

  • by MIDLIFE
  • Dec 24 2011 08:57 PM
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  • thegamermojo
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Posted 05 March 2012 - 03:46 PM

I've been looking into this as well to power just my 1000W HPS HID light. At first I thought I would need 1000 Watts in solar power in order to power it, but I was wrong. Don't look at it in watts, but look at it in Amps.

You could buy a $200 120 Watt solar panel system. Then add your necessary hardware of a charger and a monitor, Inverter, and your batteries.

A 120 Watt system will supply about 10 amp hours of power. A 1000 Watt HID light on 120V power grid will draw 8.33 amps.

If you have those solar panels in direct sunlight for 10 hours a day then you will be collecting 100 amp hours of power per day.

my 1000 Watt HID draws 99 amp hours per day.

Now what you want to do is run 6V deep cycle marine batteries. And if you run two of them in series you should have 400 amp hours available.

If you are keeping track just the batteries could run my light for 4 days without being charged.

So in a perfect world you would be running off of the batteries, and your solar panel will fully charge your batteries every day.

Of course in my example 120 Watts is technically not enough. You don't want to gamble with exact numbers. I would probably be safe if I bump up to a 200 Watt system. That should give me about 16 amp hours of charge.

What I've come up with so far is for a $500 investment I would be saving $60/mo. It would pay for itself in less than a year.

Edit: Also if you want to really be efficient you could do a grid tie in, so that if your batteries are fully charged, and are being charged at a rate that is faster than your current draw, then you could bleed off any overages back into the power grid. By doing this you will reduce your overall electric bill on a monthly basis.

Oh and did I mention that if you live in the US, this will qualify for a 30% tax credit on your federal taxes? And in the state I live in it will also qualify me for a property tax exemption. That alone pays for the system and then some.

Well :) your math is sound but problem is it just doesn't work that way .my buddy runs 250 watt solar array with a 6 battery system ,his 600 watt hps will only run about 6 hours a day before the voltage drops to the point of his invertor shuts off which is around 10 volts this protects your elec. also very few places get 10 hours of uninterupted light a day,then add in the cloudy and rain days. well think your figures are a little off but you are right about not looking at in watts but in amperage hours. i truly wish it was that easy to run a 175 watt panel but fact is it will take much more to run a 1000 watt hps.:(

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  • fyrhazzrd
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Posted 05 March 2012 - 04:16 PM

hmm.. Yeah I knew in the winter that I wouldn't be able to get the ten hours of light, but I thought for sure in the summer I would be able to. Honestly though if I were to pull the trigger and do it, I would probably go for around 700 Watts, and twenty or so batteries giving me 4,000 amp/hours of juice to feed my system. That will cost some serious bread, but it will pay for itself just in not having to pay property taxes, plus the huge tax rebate every year. I still feel it is worth it.

Yes, I have a friend doing solar as well. On a really sunny day he gets full amperage for around 9 hours out of the day and 25-50% amperage from 2-4 hours a day. I haven't seen his system running in the summer to know what he is getting there.

On cloudy and overcast days he still gets 75% of his amperage output for the majority of the day. He even gets some output from his panels when it's raining, as long as there is light out there he has output.

He is able to run his 600 Watt light on a 400 Watt system without any problems, but he does have three rows of batteries in his garage.

Edited by fyrhazzrd, 05 March 2012 - 04:18 PM.

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  • thegamermojo
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Posted 05 March 2012 - 08:03 PM

here is one of the cheapest places i've found on quality solar panels Kyocera KD245GX-LPB 245 Watt Multicrystalline Solar Module and i would also skip the deep cycle marine type batteries and go with the more expensive agp batt. they work in all temps and are made pretty much for solar panels. the money spent will be worth it in the end. also a good charge controller not one of those cheap ass harbor freight ones .and finally if your wanting to go totally off-grid you will need a real goon inverter preferably a sine wave especially if your going to have any expensive electronics running like a pc or flat screen.Little long winded sorry but good luck it can be done but it's not cheap at first.

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  • Kushqt
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Posted 03 April 2012 - 11:41 PM

If you are dumb and will get caught, dont do it. you can't go from 6,000 watts to only 1,000...if you are going to do it you need to add the light to ir right from the start so your bill does not change.

Stealing electricity is dumb. If it's expensive, don't run so many lights.

You will get caught eventually, especially with how easy it is to monitor where there electricity is going.

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  • growerBabe
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Posted 03 April 2012 - 11:50 PM

Karma Im avery big believer in it
Have fun in the Hoscow

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  • rhapsodyrcks
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Posted 04 April 2012 - 12:01 AM

Oh and did I mention that if you live in the US, this will qualify for a 30% tax credit on your federal taxes? And in the state I live in it will also qualify me for a property tax exemption. That alone pays for the system and then some.

Hurry up and get it. Those tax credits are on the chopping block...its been largely unsuccessful and with budget issues its one of the things there talking about eliminating.

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  • IceCreamKidd
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Posted 10 May 2012 - 04:59 AM

does anyone run solar for their grow room ??
i would like to be up and running in a large room with a 5ft x 10ft grow space in the centre 3x led lights, i have a light rail , with 18 r-dwc(Budslingers), 45wt air pump, 50wt water pump, 2 x 25wt fans , extractor fan plus a few tubes to veg with.
the 2 600wt hps lamps i have now will go

only want to run this once/twice a year then use the solar system to run some tubes in the workshop if thats possable.
anyone have any idears how the best way to run LEDs from solar, ie; storage for the power 12v 24v or 220/240v , i dont want to put the solar power into the grid system !!!
i'm a carpenter not a sparky so you might have to type slowly so i can keep up.

thanks Middy in cz

RIP havel

Since you are not going to go grid-tied you might as well primarily look at 12v off-grid panels which wont need a voltage drop when feeding into your battery system. Youll need a good charge controller and will likely need to maintain the batteries with a trickle charge throughout their life despite only wanting to use them a few times a year. Whichever 12v batteries you choose, make sure they all match because they will equalize and perform only as well as the weakest link. Deep cycle marine batteries are popular, and you should be able to find them lots of places. AGM offgrid specific batteries are an option as well but are probably more $$$.

If you do try to get tax credits or take advantage of other incentives, someone will likely want to inspect the installation and see your setup. Here is a link to current renewable programs etc in the US. DSIRE: DSIRE Home

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Posted 13 May 2012 - 08:10 PM

thanks for the link ICK but i´m in the czech republic, also it looks like it will be next year now (ill heath and life shit).

i will post on here on any things i find for solar wind or water power.

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Posted 14 May 2012 - 11:10 PM

I'm interested in solar as well...I have a small solar system setup right now that can run about 30w on 12/12 lol. It's taking way more $ then I thought it would...though my system is kinda ghetto so far.

I've been eyeballing those flexible solar panels with the sticky backs for some time now but they only come in 24 or 48v :( I wanted to mount em on something light so they'd be easy to maneuver. I also get some major hail here in the summer.

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Posted 15 May 2012 - 12:57 AM

Most panels are tested in hail conditions, at least panels for homes. Check out this 60w kit SunForce Products Inc. - 12 Volt Battery Charging & Backup Power - 60 Watt Solar 12V Power Generator Kit

Its came up in a few searchs but I have no idea if its any good.

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