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The Ecobob Cafe is for people interested in eco living to socialise and to share ideas and information. 8178 Posts

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This forum is for topics relating to eco friendly building design, construction and renovations. 5450 Posts

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Topics in this forum relate to sustainable real estate and sustainable property development. 282 Posts

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This forum is for discussions on World Environment Day. What are you, or your organisation, doing for World Environment Day? Do you know of any activities happening around the country for World Environment Day? 81 Posts

Latest Forum Posts

Author Post

140 posts
Posted Today, 10:02 AM
Rex we all know weijing3333 post is a poorly disguised informicial and there seems to be a lot of this happening on the site of late. I just wanted to see if the individual had a mind of his own to answer my questions.


495 posts
Posted Today, 8:50 AM
TROLL WARNING - TROLL WARNING - commercial now playing claiming a viable project that the Indian Government Energy Minister has already condemned.

'weijling3333' is trolling unpaid advertising.

Poor quality' Chinese junk sailing through Ecobob waters.


495 posts
Posted Today, 8:44 AM
TROLL WARNING - TROLL WARNING - commercial now playing under the guise of a question.

'alice915' is trolling unpaid advertising.

Poor quality' Chinese junk sailing through Ecobob waters.


1 posts
Posted Yesterday, 10:28 PM
Hi, instead of importing which will cost you more, you can buy simple window and apply glass powder coating on it to design it according to your theme. If you wish, you can get ideas at

140 posts
Posted Yesterday, 8:30 PM
What do they do when the sun goes down, the lights, industry stop ?, having this much capacity is pretty usless without similar capacity storage at night. It cannot be used by industry as the source is not reliable 24x7.

8 posts
Posted Yesterday, 7:53 PM
The state of Uttar Pradesh has signed agreements with the Solar Energy Corporation of India (SECI) for installation of four solar PV power projects with a total capacity of 600 MW. The projects will be set up under the Indian government’s larger policy to add 20GW of solar power capacity through ultra mega solar power projects in the next few years.The four projects planned in Uttar Pradesh will be distributed in a project of 350MW, a project of 50MW and two projects of100 MW each. While Uttar Pradesh has a solar power policy of its own, separate to the national solar mission, it is yet to see any significant momentum. (Source:

8 posts
Posted Yesterday, 6:42 PM

I just bought this portable solar panel for when i go camping and backpacking. I can currently use it to charge my portable powerbank to keep my phone charged. There are times when I'm several miles into a state forest or something and could potentially be stranded if my car battery failed.
I have very little knowledge of <a href="">solar panel</a>
and converting current, but it seems like I just need to step the voltage down to 12v and limit the wattage?

495 posts
Posted Yesterday, 9:29 AM
Hello Seeker,

It's a devious method of using the Ecobob Forum to obtain 'free advertising'. This is not a genuine request for information from other members - it's an unpaid for, commercial link and the 'member' should be stuck off.
I see a few more commercial cheats are trying this technique - note Carlin!

Regards Rex

358 posts
Posted Yesterday, 12:48 AM
"Is it possible to have the import/export meter programmed that at night it will run on night rate instead of variable rate."

The import export meters can be programmed to do a whole pile of things, but only if your retailer sells you power as per your wish: night rate in your case.

With solar PV generation on a home, it completely stuffs up the cost recovery charges for the distribution and transmission lines which you need to give you reliable power. Most retailers can't provide a cheap service at night and no income during the day - its like taking your own food into a cafe and demanding to use their facilities.

Have you looked at Flick as a retailer for example? They charge you what the actual wholesale price of power is, plus an administration fee I understand. This way you will get really cheap power most nights - except for dry years when you have to keep a closer eye on the wholesale price as it can get very volatile (and very expensive). It's not for everyone.

I have no association with them.

358 posts
Posted Yesterday, 12:31 AM
Hope the solar bill does not get passed.

If you can't justify getting panels at the market price (which is a competitive international price), why should someone-else help you pay for them?

With all the thermal power stations shutting down over the next 36 months, all NZ's power will be renewable - so why should we support imported solar PV panels through mandated buy-back prices?

358 posts
Posted Yesterday, 12:28 AM
Weird post - Alice915 asking and answering

358 posts
Posted Yesterday, 12:25 AM
Hi Kath

How much power is the new packhouse going to use? (Is there an existing packhouse - if so, how much power does the existing packhouse use?)

Not sure the weight of the panels will be the issue here.

8 posts
Posted 27 Aug 15 6:16 PM
Is the renesola's solar street panel( expensive????

2 posts
Posted 27 Aug 15 5:42 PM
yeah underfloor heating system is the perfect way to heat your home.

2 posts
Posted 27 Aug 15 5:39 PM
I think under floor heating system for your family to stay warm in winter season. These heating systems are more effective and energy saving and it is easy to installation.

<a href=""></a>

495 posts
Posted 27 Aug 15 11:43 AM
Hello weijing3333 - What’s wrong with this post?

“we believe that a return to a level playing field will help solar power in Europe to grow” -

No it won’t because it will not be “a level playing field” – it will still need massive taxpayer subsidies to support PV against electricity from the grid. Spain has leant this the hard way.

“support the European electricity market in achieving its challenging emission reduction goals” -

There is no point trying to achieve an unattainable theoretical CO2 ‘emission reduction’ when there has not been any actual temperature trend change for 18 years 7 months.
Clearly, there is no link to the claim that CO2 causes ‘runaway global warming’ as CO2 has increased but temperature has not, so there is no need to reduce our anthropogenic CO2 output.

A much more likely hypothesis is that the currently greatly reduced sun spot count for solar cycle 24 will lead to another Maunder Minimum with a sudden drop in world temperature of about 1.8oC.

The irony is that any additional anthropogenic CO2 content might, in some minor way, help mitigate against the Sun repeating a disastrous drop into another 1645 ‘Little Ice Age’.

Look to your history. Don’t say it cannot happen again - 10% loss of life from cold, famine and disease with mass migration toward the equator – but barbed wire borders now blocking the way.
That can lead to war but will also end the AGW myth.

Regards Rex

2 posts
Posted 27 Aug 15 11:16 AM
Hi there! Would you be able to just clarify your post? You're running air-to-water heat pumps to run radiators and heat hot water. Is that correct? Any problems warming on cold nights? Did you need oversized radiators? And what sized rooms are you warming?
So hard to get a straight answer out of companies, be great to hear it from someone who's experienced it!

8 posts
Posted 26 Aug 15 6:29 PM
A détente in the long-running between European solar photovoltaic module manufacturers and China may be on the horizon after the head of the European PV trade association, Oliver Schaefer, said that EPIA would support free trade and the end of current trade barriers on imported Chinese solar modules. This reportedly the first time the trade association has set a strategy position on the ongoing trade conflict that has impacted the PV industry.

Schaefer acknowledged that the former stance of EPIA had been to sit on the fence over the trade conflict, which had marginalized its ability to be a major stakeholder in the conflict that led to a minimum import price (MIP) agreement for Chinese modules.

"EPIA is a strong supporter of free and fair trade and we would like to see trade relations between Europe and China, on solar modules and cells, return to normal undistorted, fair trade as soon as possible, when the duties and respective price undertaking expire in 2015," Scahefer said.

"The board has agreed this position, as we believe that a return to a level playing field will help solar power in Europe to grow, and support the European electricity market in achieving its challenging emission reduction goals. Consumers will also be able to buy quality products manufactured at scale, at the best possible prices," added Schaefer.

The clear policy stance to get rid of the current agreement is designed to attract strong support from interested parties across the supply chain on a global basis to back EPIA plans to potentially end the MIP by the end of 2015.

Schaefer announced EPIA’s new position at the plenary session of SNEC 2015, being held in Shanghai, China this week. EPIA said it would release details of its position soon.


1 posts
Posted 26 Aug 15 10:20 AM
I think there could be a place for a double layer of building wrap. One against the framework under the insulation and a polythene layer over cavity battens and behind wall cladding. It would be worth while to investigate this outcome. Can't see the costs outcome over powering the recent OSH requirements.

8 posts
Posted 25 Aug 15 8:52 PM

There are many Factors affecting solar street price, such as pole height, lamp brightness, the brightness of the lamp could affect the lighting length. So Who can told me the details of these factor and the <a href="">solar stree price</a>

64 posts
Posted 25 Aug 15 2:07 PM
I think air to air heat pumps are lemons in new houses, but in older houses they are better than a small heater and they are solution until a proper central heating or upgrade of the thermal envelope can be carried out.
In new houses a radiant heat source is definitely a better, healthier way to go. But the most important thing is a good thermal envelope with thick, airtight insulation and much better than those low performing aluminium windows.

7 posts
Posted 25 Aug 15 12:03 PM
I have 2 x 5000ltr corrugated rainwater tanks. My husband and I would like to do as much of the installation as possible ourselves and get a plumber to do the rest. I have some questions regarding installation.
We have a 1mtr deep hole ready to put them in, which is the allowable depth recommended by the manufacturer.
1. As we are using 2 tanks is it better to join them at the lowest outlet holes and should we use a rigid connection pipe or a flexible one? We presumed the flexible one would be better.
2. Do we need to leave space to access this connection as we want to backfill the tanks with scoria or some other fill? Access 1 mtr down would be difficult.
3. Where would be the best place to drill the hole for the outlet. We plan to use a floating outlet hose?
4. Is a submersible pump or freestanding one best?
5. Should the outlet be in the primary tank or is it not an issue and should the overflow also be in the primary tank?
Grateful for comments and answers.

4 posts
Posted 25 Aug 15 11:43 AM

I agree with a lot of what you are saying, but I'm not sure if the heat pump is promoted as a cure all solution. It's definitely not a sticking plaster over an aortic hemorrhage.

In my case, we tried keeping our flat warm with an oil fin heater. It didn't heat the room properly and was so expensive to turn on, we'd only do it for the shortest time.

We've got a Mitsubishi Inverter heat pump now and it's fantastic. It actually keeps the room warm, and cycles the air which gets rid of that humid, muggy feeling when you're trying to dry damp clothes inside. It's cost effective to run, and mine and my wife's health has been much better this winter, which I put down to running the heat pump.

True - Some older heat pumps struggle to heat when temperatures get low. Technology is catching up with that though.

True - Heat pumps are designed only to heat one area. Though that area doesn't have to be small. You get the heat pump to match the size you want to heat. HVAC or heat transfer units can be really effective ways to transfer heat around your whole house. But what other heaters transfer heat around your house without other devices? Not an oil fin, gas heater, fan heater, or even a fire. Pretty much all heaters will only heat the space they're in.

True - Most houses in NZ have terrible insulation, and fixing that will go a long way to keeping your house warm no matter how you're trying to heat it. But I'd argue that all heaters struggle to heat an area if it's poorly insulated, and heat pumps aren't alone there.

True - Having the heat pump blow air directly on you can be uncomfortable. We just direct the air flow away from us (generally onto the clothes rack with damp laundry). Some of the latest heat pumps actually have sensors in them that allow them to detect where people are, and send the hot air flow away from them. Not sure how I feel about that... But the dry heat of a heat pump is great for removing condensation.

I can only talk from my own experience, but having a heat pump installed in our flat was so beneficial. It's cost effective, it cycles and filters the air, and air conditions in summer too. If you have more questions, chat with an installer. These guys put mine in and were really friendly!

4 posts
Posted 25 Aug 15 11:19 AM
I don't know what panels your construction company is talking about! Most domestic solar panels are very light weight! I've seen 10 installed on the roof of a garden shed with no troubles at all. I don't believe adding solar panels will require any additional reinforcement.

There are different types of solar panels, and some are better than others. They work with a Tier and Class rating. So a solar panel that is Tier 1 Class A, is more efficient than a Tier 2 Class B solar panel. Obviously better solar panels are likely to cost more, but they're also likely to last longer and be more effective at generating electricity.

JA Solar make some pretty good panels. Here's some info on them:

4 posts
Posted 25 Aug 15 11:12 AM
Who installed your solar system? It might be best to talk to them.

I guess it would depend if the company that installed your system had other panels in stock and were able to replace them if there was a problem. It's likely the installer would act as an agent of the manufacturer to check if there was a fault.

I'd also make sure whoever is installing your solar system is SEANZ accredited, so you'll be covered if something does go wrong.

These guys have pretty good resources on their website when it comes to all things solar.

In my experience, removing one panel won't take your whole system out of commission.

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