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Solar Power for Home

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32 minutes ago, lom said:

The box in your photo is not a common one, it is actually a 2 to 2.  From left to right: 2 fuses for a string (+ and -), a dual pole breaker for output, and 2 surge protectors for a string (+ and -) , then followed by an identical set for the second string.

They are here now and only brought a frame for 6 side by side.  Is there an issue with having a 5 meter gap between two groups of 3 panels on the same string?  I can cut the frame at welder right now so they have a gap.

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1 hour ago, atpeace said:

They are here now and only brought a frame for 6 side by side.  Is there an issue with having a 5 meter gap between two groups of 3 panels on the same string?  I can cut the frame at welder right now so they have a gap.

Doesn't really matter if you have a gap or the panels together on one side. I would definitely had added 4 more panels in order to get most sun exposure all the time. Contrary to common belief, you can have more KWp than inverter KWh, the panels do not push power into the inverter , it is the inverter pulling and it should know its limits and not take more than it can handle. You only have to make sure that the string voltage does not exceed inverter limit.

2 hours ago, lom said:

Doesn't really matter if you have a gap or the panels together on one side. I would definitely had added 4 more panels in order to get most sun exposure all the time. Contrary to common belief, you can have more KWp than inverter KWh, the panels do not push power into the inverter , it is the inverter pulling and it should know its limits and not take more than it can handle. You only have to make sure that the string voltage does not exceed inverter limit.

That's what I thought.  I asked on this thread if over paneling was an issue but at the time nobody responded.  I should have gone with at least 2 more panels but can add more easily later.  I usually only have 1 AC on at one time that usually hums along drawing 8oo watts mid day.  my exercise room when in use draws about 2000 watts for a couple hours so might not have enough panels (6.6kWh) for that on a cloudy day.  I'm cool with using the grid also.  My goal is to be 85%-99% off the grid. 

7 hours ago, atpeace said:

That's what I thought.  I asked on this thread if over paneling was an issue but at the time nobody responded.  I should have gone with at least 2 more panels but can add more easily later.  I usually only have 1 AC on at one time that usually hums along drawing 8oo watts mid day.  my exercise room when in use draws about 2000 watts for a couple hours so might not have enough panels (6.6kWh) for that on a cloudy day.  I'm cool with using the grid also.  My goal is to be 85%-99% off the grid. 

85-99% can be the point where you get the best value: short ROI. It take some time to get the overview on how all works and wht can do and not do. It took some time before i understood why and how over paneling is no problem is your inside max voltage. I wish I had added a few more panels too when its the hottest season.. But all in all very happy with my setup.

 

Pink

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54 minutes ago, Pink7 said:

85-99% can be the point where you get the best value: short ROI. It take some time to get the overview on how all works and wht can do and not do. It took some time before i understood why and how over paneling is no problem is your inside max voltage. I wish I had added a few more panels too when its the hottest season.. But all in all very happy with my setup.

 

Pink

After further thinking, I decided to add 2 more.  Told him to bring more panels that we can add if after testing tomorrow or the next day.  Strated at 90k budget a few days back and now am pushing through125k 🙂 Oh well

  • 1 year later...

I have a corner of my balconey which is

about 5 cubic metres .I would like to

Install a solar spotlight shining down

onto the plants .Does anyone

know the best system for me ?

1 hour ago, Jim Blue said:

I have a corner of my balconey which is

about 5 cubic metres .I would like to

Install a solar spotlight shining down

onto the plants .Does anyone

know the best system for me ?

Holy Crap ... I've had mine for almost 4 yrs, impressive. There's another, more current thread about solar lights, but I didn't see it.

https://aseannow.com/topic/1254063-recommend-a-solar-garden-light/page/2/#findComment-17265783

3 hours ago, Jim Blue said:

I have a corner of my balconey which is

about 5 cubic metres .I would like to

Install a solar spotlight shining down

onto the plants .Does anyone

know the best system for me ?

Do you want the light to help the plants grow (gro-light) or just look nice??

Gro lights are a peculiar pinkish colour which the green leaves absorb.

"I don't want to know why you can't. I want to know how you can!"

5 minutes ago, Crossy said:

Do you want the light to help the plants grow (gro-light) or just look nice??

Gro lights are a peculiar pinkish colour which the green leaves absorb.

Thanks , they are all mostly cactus, I just want to be able to spotlight them a bit

when I get visitors .

Well maybe you want to see this

EcoHouseThailand.com – Designing and building an Eco House in Thailand

It is a blog of an AN member, having his house built and using solar power.

Lots of showing info, also not about the house, but overall nice to see.

I thought in past it was more technical, especially about solar, but ok it is his blog.

Still adding , arranging.

Reference over-paneling.

The only consideration is to remain within the parameters of the inverter/charge controllers.

There is a limit on the maximum voltage and power they can take.

For example:

My panels are arranged as 2 per string, and three stings per group with a massive total of two groups.

Each string is rated to give a maximum voltage of 100.45Voc and a maximum current of 13.15A Imp.

This will give a maximum power of 100.45V x 13.15A = 1.32kW

With three strings in parallel the maximum power would be 3 x 1.32kW = 3.36kW.

The SRNE charge controllers I had been using prior to upgrading the panels were rated below this maximum power figure.

Even with panel derating the SRNE's were cutting it a bit fine and they let me know in no uncertain terms they were not happy.

I replaced the two charge controllers with a couple of PowMr 80Amp units with an input power rating of 3.84kW and voltage rating of 160V.

Now everybody's happy again.

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