The dreaded DNO and G99

Before long, you are probably going to hear the term "DNO Application" or "G99 Application". This refers to an application to the Distribution Network Operator (the people who manage the cables, poles, transformers, etc., that bring electrical power to your home).

For any solar instalation greater than a certain size (I believe 3.68kWp at the time of writing) an application to the Distribution Network Operator must be made. This takes time (about 3 months in my case) and often money (I was charged an extra £450.00). Because of this, there is a big incentive to a salesman who wants to make a sale and move on to recommend an installation smaller than this critical size. Many users, with relatively low electricity usage, will be fine with a system of less than this size. However, it is worth being aware that this issue exists.

I use the term "Dreaded G99" because some installers will avoid it because it can be a lengthy process over which they have little, if any, control. In my case, the extra three months made very little difference because business was booming for the installers and it could take that long just to get the equipment ordered.

Certainly, the £450.00 fee I was charged for the supplier to make the application would seem to be out of all proportion to the work involved. I am inclined to think of it more as a deliberate disincentive to make such a application.

An explainer (Northern Powergrid): here

Comments

Post a Comment

Popular posts from this blog

Automation tasks underway

I have the following automation tasks underway, in various stages of completion: If there is a suitably inexpensive timeslot overnight, use it to top up the batteries to 100%. Using this, instead of solar, will allow more solar to be exported at 15p/kWh. Inexpensive slots during sunlight hours are not as useful because I can't export at the same time as using electricity from the grid. If there is not a suitably inexpensive timeslot overnight, top up the batteries from the grid during the period coming up to peak time (which is usually fairly reasonably priced). Make sure any battery charging from the grid is definitely off before the 4pm-7pm peak rate starts. When the electricity price goes negative, boost the hot water temperature using the heat pump and immersion heater. This is a way of benefitting from being PAID to use electricity and storing a little of it in the form of hot water. Change the colour of a lamp in the kitchen to reflect the current electricity
Read more

No, YAML ain't, but what is it?

YAML is said to stand for "YAML Ain't a Markup Language". This unhelpful acronym (and brazen use of the old "GNU = GNU is Not Unix" joke) doesn't really help in understanding YAML as it pertains to Home Assistant. Well, in this context, YAML is a way of defining the hierarchical configuration settings that drive Home Assistant. So, suppose we have some settings such as: Lights: Left: Brightness: 4 Colour: "Red" Right: Brightness: 6 Colour: "Green" Fans: Extractor: 2 YAML is just the thing to define such a hierarchical structure. For the moment, don't worry too much what these might represent. Consider, however, that we might want the actual settings (such as 4 or "Red") to be controlled by some variable quantity derived from something else within the system. In this case it would be useful to be able to replace the settings with snippets of Python code. And this is, effectively, what H
Read more

A new strategy, a new approach to automation

As I explained before, I was very wary of automating my system beyond what the inverter could do natively. As a retired elecronics and software engineer there is too much danger that such an endeavour would become a slippery slope. Well, I now have one foot on that slope! What prompted this change of heart? Well, during the last month we had some periods with VERY low Agile prices and it got me thinking about how I use my generated solar power. One way of looking at it is to look at the "opportunity cost" of the solar power generated. The incoming solar power, thanks to the sunk cost of the system, comes in at 0p/kWh. However, I can sell any excess back to Octopus at 15p/kWh. That means that, effectively, any solar that I use is costing me 15p/kWh - inasmuch as I could sell it if I want to. This way of thinking leads me to consider a different strategy: What if I were to charge my batteries on a cheap rate at night and, during the day, export most or all of my solar at 15
Read more