chez le médecin
Architect should have asked about solar if he /she specified matchsticks .
Here's your problem..Quick question around this.
I am well into a reno & have just confirmed the solar installer. The architect has just come back to me saying the roof will need to be reinforced to support the additional load of the panels, with an additional cost of course.
Several friends & family have gone down this road recently & I have never of heard anything like this, anyone else?
I'm calling BS
Where the f ck are you to be getting more than 8kwh/kw?I've never heard of those solar panel brands.
On my house I am using REC Twin peak 2 panels and they have been doing great, I have a 5.2Kw system and the day before it produced 42kw of energy for the day and it averages around the 25-39kw mark depending on cloud, obviously it drops a lot with the rains.
Other panel brands to look at are of course LG but also Sunpower as well as REC as for your inverter, fronious (SP) get reviewed well but so too does Solaredge, i'd stick with fronious and don't budge if someone offers something else you haven't heard of.
Depending on where and how the house is being built or how exposed to high winds winds, it might have something to do with the wind pushing on the panels if they're not installed flush with the roof. Houses are built as cheap as possible these days, the house I'm living in is a double brick cavity home from the 70's with hardwood roof trusses as opposed to single brick with plaster board walls and pine roof trusses.Architect is responsible =def not fit for purpose. . prolly the arse covering just backfired.
But as you said if the installer can jump all over the roof surely the static weight of a few panels wont hurt.
I have only heard this is an issue on huge spans w no intermediate supports.
Our local hall is a bit like that, just wide truss spans.
TassieWhere the f ck are you to be getting more than 8kwh/kw?
I can point you to any number of guys who would love to know how you can do that, even single axis tracking doesn't get there.
Ahh, makes sense.Tassie
I have a 5.2 system but the day it produced 42kwh for the day it was going bonkers and was consistently doing around 5Kw/h.
Obviously the system struggles on darker days but once the sun kicks in the system tends to go a bit nuts, right now as I type this the panels are pulling in 4.9kw
I installed a 6.4kW system on my house in QLD about 8 months ago, and whilst it is not Melbourne, I too anguished over all the literature, hype and bullshit during the selection process. I'm also an electrical engineer so have a pretty good understanding of what is truth and what is horseshit coming from the salespeople I dealt with from the prospective vendors.So I'm getting close to pulling the trigger on a solar PV system at home. Have spent the past few weeks reading, e mailing and talking to so many sources my head is spinning. It's a really strange industry, seemingly flooded with cheap and nasty companies just trying to undercut each other in order to sell as many units as possible before closing up and running for the hills. Amongst these are the reputable, genuine companies who actually know more than can be read on their web page and actually care about giving you the right advice and product. It's a slippery course to navigate but I'm slowly whittling away the cheapos and rip offs and am settling on a particular configuration of 5.4kw system with Fronius single phase inverter and panels either by Jinko or et solar.
Quotes for identical systems in terms of these components vary from $5300 to $7700, which is huge in terms of percentage. They all spruik certified electricians, installers, system engineers, cec accredited independent inspections same warranties on products and workmanship, so the hard part is believing they'll still exist long enough to honour a 25 or even 10 year warranty..
So where is the rest of the value? One company offers lifetime system analysis so as to be able to inform us on more beneficial energy usage patterns, or issues with power generation etc, so that could be handy but not essential.
Who around Melbourne or within Victoria has had a system installed, and what would you recommend to help sift through the shit and not get ripped off but at the same time not just assume more expensive is better? I'm leaning toward a company that's about middle ground price wise, seem pretty honest, get decent independent industry reviews and are local and been in business for years. But any advice or experiences would be great to hear before I throw down 6-7k.
I'm not sure (because the power would fluctuate and damage appliances??) why but it sucks eh. They don't work without "power" supplementation. I hoped for the same thing when I got solar. So when there is a power cut you aren't any better off than the rest.Quick question for any of you out there with Solar. Due to the storms last night, the power's been out in my 'hood all morning. No problem, I thought. I've got Solar. That'll kick in and I'll at least be able to check in with the security cameras at the house.
No luck. No power. My mates' houses are the same in spite of us all having Solar installed. Does anyone know if this is just a case of weak-arse solar generation on an overcast day, or is there a safety feature that cuts off your solar input in the event of power cuts to stop any excess power getting back onto the grid?
Ok I just hambo'd and this is the reason:No idea, im not a sparky. will depend how the meter is set up i assume...
That's what I thought. It's a shame you can't isolate your house from the grid in instances like this.Ok I just hambo'd and this is the reason:
Your grid-connected solar power systems must by law shut down if the grid loses power. The reason is that linesmen repairing faulty electricity wires must be able to do so safely, without any solar power travelling back into the grid during maintenance and repair. Your electricity if fed back into the line could create a danger to the service personnel. Therefore when there is a black out you will also be without power. Your solar power system will automatically turn on during daylight hours when the power comes back to the grid.
You can...That's what I thought. It's a shame you can't isolate your house from the grid in instances like this.
Was just about to add this. Dad's still a licenced sparky so was factoring this in to battery install equation. Legal in SAYou can...
You need to have a 3 way switch installed to isolate mains infeed. I do it with my generator. The generator is isolated unless the switch is flipped then only the house (two circuits as it is wired 3ph) are energised, fridge, freezer, water pump, hot water trigger, biocycle, TV, stereo etc. No back emf into the grid but set up has to be inspected and approved, here anyway. I don't wake up the solar though, the demand can't handle the supply and one or other sources could release the magic smoke. Maybe. Not worth the risk. Potentially hard on consumers in the house if solar is up and down with cloud cover. I am assuming the solar inverter can just ramp down to meet demand, not sure what happens when demand > than supply... my house generator is 3.5kVA and solar is 3.5kW.
Biggest issue is knowing when power is back as neighbours are not close.