All times are UTC + 8 hours




Post new topic Reply to topic  [ 74 posts ]  Go to page Previous  1, 2, 3, 4, 5  Next
Author Message
PostPosted: Feb 13th, '13, 22:07 
Offline
Seriously, this cant be healthy.
Seriously, this cant be healthy.
User avatar

Joined: Mar 26th, '10, 20:46
Posts: 5275
Location: South Australia
Gender: Male
Are you human?: Yep
Location: South Australia
I hate posting decisions like this.

It's like posting a picture of your lack of impulse control :)


http://www.ebay.com.au/itm/ws/eBayISAPI ... OC:AU:3160


But worse than that, it's like posting a picture of a flimsy bit of plastic that compares with the build quality of a disposable spork...

That I just spent 65$ on.

:?

_________________
-

My system

120 THINGS IN 20 YEARS - My blog about my learning adventure

My skills include being able to move slowly forward in time, and if I really concentrate, I can sometimes tell what I'm thinking.


Top
 Profile  
Reply with quote  
    Advertisement
 
PostPosted: Feb 13th, '13, 22:26 
Offline
Legend Member
Legend Member
User avatar

Joined: Jun 21st, '12, 06:51
Posts: 545
Gender: Male
Are you human?: YES
Location: Australia, WA, Beldon
It's OK, the MPPT controller on my solar panel is a clone of that one as well, it also has "thunder protection" LOL

To answer your question, 20 amps is battery current, so you're very close to the limit. No more solar panels for you!

_________________
My system
My solar upgrade
My wicking beds
My chooks


Top
 Profile  
Reply with quote  
PostPosted: Feb 13th, '13, 22:32 
Offline
Seriously, this cant be healthy.
Seriously, this cant be healthy.
User avatar

Joined: Mar 26th, '10, 20:46
Posts: 5275
Location: South Australia
Gender: Male
Are you human?: Yep
Location: South Australia
Cool, thanks.

How do you determine such stuff?

There doesn't seem to be rhyme nor reason*. Is it some kind of convention that says 20 amps refers to the output side of the equation?



*I never shop without thunder protection. That would be simply foolish :D

_________________
-

My system

120 THINGS IN 20 YEARS - My blog about my learning adventure

My skills include being able to move slowly forward in time, and if I really concentrate, I can sometimes tell what I'm thinking.


Top
 Profile  
Reply with quote  
PostPosted: Feb 14th, '13, 09:04 
Offline
A posting God
A posting God

Joined: Sep 15th, '07, 09:09
Posts: 3706
Location: WA
Gender: Male
The panels are SR05-170, the open circuit voltage is 43.6v. I checked a couple and they produce that. The V at pmax is 35.8v and current at pmax is 4.76A though I have no way of testing that at the moment.
Lets just assume I don't have a lot of money :) and will only be able to buy one thing. I have the pump, I can easily get a small inverter, the battery is debatable. I am happy to only run daylight hours.
I am fairly good at modifying stuff.


Top
 Profile  
Reply with quote  
PostPosted: Feb 15th, '13, 06:00 
Offline
Legend Member
Legend Member
User avatar

Joined: Jun 21st, '12, 06:51
Posts: 545
Gender: Male
Are you human?: YES
Location: Australia, WA, Beldon
Here are some options to consider:

The cheapest option may well be to try to find a 36v fountain pump...

The option most likely to work would be an mppt controller, a small (5aH) deep cycle battery and a 12v pump.

The option of a 100W dc-dc converter plus inverter plus existing pump would be my least favourite.

You may be able to get a 36v inverter on ebay but good luck with that.

The most geeky solution would be to rewire your panels for 12v and buy a 12v bilge pump.

_________________
My system
My solar upgrade
My wicking beds
My chooks


Top
 Profile  
Reply with quote  
PostPosted: Feb 15th, '13, 07:04 
Offline
A posting God
A posting God

Joined: Sep 15th, '07, 09:09
Posts: 3706
Location: WA
Gender: Male
Thanks for that nebbian, I will have a look round and see what I can find. :)


Top
 Profile  
Reply with quote  
PostPosted: Feb 15th, '13, 07:40 
Offline
A posting God
A posting God

Joined: Sep 15th, '07, 09:09
Posts: 3706
Location: WA
Gender: Male
Hmm, came across some interesting products while ferreting around. There are apparently plug and play or SWEA grit tie inverters that use 1 or 2 panels so you just hook your panels up and plug into a house socket. This may be an option as I will be producing more than my pump uses.


Top
 Profile  
Reply with quote  
PostPosted: Feb 15th, '13, 13:28 
Offline
A posting God
A posting God
User avatar

Joined: Dec 10th, '11, 15:03
Posts: 2089
Gender: Male
Are you human?: What is human?
Location: Perth Hills
Got a link sleepe?

Sent from my GT-P7100 using Tapatalk 2

_________________
Aquarium System
IBC System
Blog


Top
 Profile  
Reply with quote  
PostPosted: Feb 15th, '13, 14:19 
Offline
A posting God
A posting God

Joined: Sep 15th, '07, 09:09
Posts: 3706
Location: WA
Gender: Male
ebay cheapy http://www.ebay.com.au/itm/350W-Grid-Ti ... 5895wt_988

Aus site http://www.laddertech.com.au/solar-prod ... w-inverter

The are not exactly going solar for backup but may be my cheapest easiest option.


Top
 Profile  
Reply with quote  
PostPosted: Feb 15th, '13, 17:02 
Offline
Legend Member
Legend Member
User avatar

Joined: Jun 21st, '12, 06:51
Posts: 545
Gender: Male
Are you human?: YES
Location: Australia, WA, Beldon
I think that one requires AC to work, ie if you don't have mains power, it won't turn on. I could be wrong though.

_________________
My system
My solar upgrade
My wicking beds
My chooks


Top
 Profile  
Reply with quote  
PostPosted: Feb 15th, '13, 17:31 
Offline
A posting God
A posting God

Joined: Sep 15th, '07, 09:09
Posts: 3706
Location: WA
Gender: Male
nebbian, I can take an outage of a few weeks and the fish are ok, the GB biofilter will need support but that is doable, 4w is a breeze.

This plug in thing will be useful, and link them (maybe), when I eventually go bigger in that I can run it outside away from the trees and eventually find some batteries. Dumping load to the Grid seems sensible. The puzzling thing for me at the moment is the difference between "working volt vpm", this one is 36v ; and v at pmax which it says on mine is 35.8v.


Top
 Profile  
Reply with quote  
PostPosted: Feb 15th, '13, 20:07 
Offline
Bordering on Legend
Bordering on Legend
User avatar

Joined: May 10th, '10, 21:46
Posts: 453
Gender: Male
Are you human?: After midday.
Location: West Australia
Be very wary of those plug in grid inverters. I doubt they could produce any evidence they are certified for Australian use. For starters just the male plug unless it has some sort of protection to prevent it producing power until it has seen AC input.

Given the short term surge in power draw that pumps pull starting/stopping I think your best option is a solar regulator and battery.

Vmax is the optimum voltage for the solar panel were it will produce the most power under full sun.

If you connected a 36v panel for example direct to a 12v battery 2 things will happen. 1st the solar panel will try and raise the voltage above the batteries maximum and basically cook it.
But at the same time the panel volts will be held down by the battery and it will produce only about 65watts.
A PWM regulator will prevent the overcharging but the panels will still be operating at less than optimum voltage.


Working volt vpm is probably bad English for the same thing.


I've been running with a Morningstar TS-MPPT45 regulator and a Meanwell Ts-1000 on 500W of solar since August in a 48v dc configuration. I have about 400Ah of battery.
To prevent excessive charge/discharge of the batteries there is a 56v dc power supply adjusted to supply 52v connected as well.
At night etc that supplies power as soon as the batteries discharge to 52v.


Top
 Profile  
Reply with quote  
PostPosted: Feb 15th, '13, 20:41 
Offline
A posting God
A posting God
User avatar

Joined: Dec 10th, '11, 15:03
Posts: 2089
Gender: Male
Are you human?: What is human?
Location: Perth Hills
Yeah for the cost of that i would look at a mppt tracker and a battery. If you have more than 1 panel available, then even better.

_________________
Aquarium System
IBC System
Blog


Top
 Profile  
Reply with quote  
PostPosted: Mar 11th, '13, 13:53 
Offline
A posting God
A posting God

Joined: Sep 15th, '07, 09:09
Posts: 3706
Location: WA
Gender: Male
As usual I took no notice of what I was told (well a bit) :) .
I bought 2 plug and plays off ebay, these are to offset the pump and beer fridge, I will test one tomorrow ie switch everything off and see if the meter runs backwards. The other will have to be phased in as I don't want my energy provider to think my meter is defective.

I have aquired a 500w sine wave inverter 24v and 2 50ah gopher batteries, the inverter will keep the batteries charged when pulling ac then switch to the batteries to provide 240v when power goes down. (it was a swap).

I will have about 8 panels left so I am still debating my options.


Top
 Profile  
Reply with quote  
PostPosted: Mar 12th, '13, 10:26 
Offline
A posting God
A posting God

Joined: Sep 15th, '07, 09:09
Posts: 3706
Location: WA
Gender: Male
Well the meter ran backwards :D
Now all I have to do is find somewhere to put it and do the wiring properly (and see how long it lasts).


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 74 posts ]  Go to page Previous  1, 2, 3, 4, 5  Next

All times are UTC + 8 hours


Who is online

Users browsing this forum: No registered users and 3 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

Powered by phpBB® Forum Software © phpBB Group
Portal by phpBB3 Portal © phpBB Türkiye
[ Time : 0.088s | 16 Queries | GZIP : Off ]