Let me offer a customer perspective:
Firstly, the forums DO help customers who are willing to search, read, digest and not just go for the lowest price installation.
No matter what product or service is on offer there will always be a percentage of the population who will purchase purely upon price. As the economic crisis takes more of a grip and the use of the internet becomes more wide spread, price will start to become more and more of a differentiating factor. This does and will continue to breed bottom feeders who routinely offer inferior products and who will cut corners on safety or service. You will never separate those customers by restricting accreditation. They will always go for the lowest cost and most respectable installers wont be able to make a decent enough margin on that playing field.
I may be in the minority; who knows? I'm degree qualified in electrical engineering and have been in the service side (applications support) of the silicon chip testing business for the best part of 30 years. As an engineer, it is in my nature to gather data, to analyse that data and to make a decision based upon data. Being out in the customer domain and having been commercially aware for the best part of my life, I can normally sniff out the spivs and those who I think are being wide of the mark. If I am told something and it doesn't make sense I will seek clarification either from the source or via forums like this. Knowledge, to me, is everything.
Having gained that knowledge the decision process can start. Cost is important to me and, in the PV industry, it is far to easy to take a short term view. This is where many customer fall down. They get seduced by the KWp on offer and get hood winked by the SAP calculation (which isn't always properly applied). They are also sucked in by the pay back time - a time that is far beyond the life of the average supplying company and also subject to "well, it wasn't very sunny last year so how can you expect to get the yield we told you" guff. Savvy people, I feel, need to take a longer term view with PV. I am convinced that by paying that bit more, the annual yield from a site may well be higher and the ROI will equal out. In addition, once paid off, the installation is generating a rather nice annuity far in excess of that which a cheap install can offer.
I am not the sort of person who wants to squeeze the last penny of discount. While I cannot condone profiteering I respect the fact that the average PV company has a certain infrastructure cost, has to pay salaries and taxes and has to operate safely. The end price has to be a win for both the customer and the supplier. If it isn't, one or other suffers.
I hope that I am not one of a fractional percent of the customer base. Perhaps I am and should be avoided, don't be afraid to tell me! I sincerely hope that there are enough customers like me to give decent PV companies a reasonable living.
You will always have bottom feeders both as customers and suppliers. For the most part, they deserve each other. The trick is to suss out customers who are operating at that level and to minimise the effort that you invest with them (but remaining polite). Focus upon the people who are more reasonable and offer a decent service to them. I hope there are enough of those around - the FIT should keep the numbers buoyant for the next few years at least.
Restricting accreditation leads to a cartel - not good in any industry and certainly anti competitive. Just focus upon your target market and let free market economies sort the wheat from the chaff.
Ian