The 10 dumb myths of solar installers

#10

You can’t split arrays on different inclinations

Yes it can be done. Sure there is a loss of output (in technical speech, a cosine loss leading to voltage mismatch dynamics because of different MPPs within… Read more

The 10 dumb myths of solar installers

#9

Frames should be used to ensure panels are optimally tilted to the North

No, this is old thinking. Adding the cost of 20 or 30 cents per watt to a system that costs $1.00 per watt so the the panels are … Read more

The 10 dumb myths of solar installers

#8

The electricity network distributor won’t allow oversizing beyond their inverter size limit

Wrong again for most network distributors. Yes, Ausnet in Victoria has this stupid rule and… Read more

The 10 dumb myths of solar installers

#7

Let’s be straight – it’s better economics to oversize the amount of panel capacity relative to the inverter (see Reasons to supersize your solar for why this is the case). All systems… Read more

The 10 dumb myths of solar installers

#6

6) Chinese product is rubbish 

The myth here is that apart from Trina, Yingli and Suntech everything out of China is cumbersome, performs badly and will be up for warranty claims within a few… Read more

The 10 dumb myths of solar installers

#5

5) You can’t put panels facing south

This one’s a biggy. I was previously in the trap also of criticising systems that were oriented south, southwest or southeast.

Actually they’re great. They’re … Read more

The 10 dumb myths of solar installers

#4

4) Panels should face west

This one comes from our friends in the incumbent power business establishment and is rubbish. Systems should face any way that maximises production and benefits the customer. … Read more

The 10 dumb myths of solar installers

#3

3) There Must be NO SHADE on the panels

OK, a system might experience some shading for some section of the day, say the afternoon – what’s the consequence? Some derating with reduced power output,… Read more

The 10 dumb myths of solar installers

#2

2) You can’t install panels facing east and west

This one’s a goody, installers vying to sell north-facing panels only. Fortunately, it’s mostly been solved. With the self-consumption of solar generation… Read more

Solar power frequently asked questions and myths

As mentioned in a previous article, I’ve been arranging the installation of a number of solar systems lately. And I like to do them big (the efficient option); I like to get them for the lowest price (within reason, because I want a good

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