So I bought an EV

So I bought an EV

I traded in my BMW 520d Touring for a BMW i5 eDrive40 Touring MSport Pro.

As the i5 was 9-months old I got £29k off the price compared to buying new. This has to be the best way to buy an EV.

 

But what caused me to do this was the maths on the cost of running the car. And I realised that while I can drive 700-800 miles on a single tank in my 520d I never do that kind of distance in reality. The biggest single journeys are ~220 miles. And, with a full charge, that is easily done on most EVs (but not all, so check your battery range and your journey requirements).

This is the costs on the old family cars:

This is the costs on an EV and using various charger types:

 

It becomes clear that owning and EV is only cost effective if you have the opportunity to charge it at home. Also, if you buy a home wall charger (around £850-£1000), you can get off-peak (overnight) low-cost electricity rates to minimise your annual charging costs.

Now, there are other perks…like zero Vehicle Excise Duty and no “expensive car” charges…but as of the 2025-26 UK tax year the government is removing these perks. A standard charge of £195/year for an EV and the £400-per-year-for-five-years “expensive car” charges will apply. Most family EVs (SUVs abound in the EV market) are in-excess of the £40k list price threshold. These VED charges are off-set by the EV savings but you *must* then charge at home to make it work financially.

With no new Petrol/Diesel cars being sold from 2030 onwards a new car will be impractical for everyone who has only on-street parking.

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Posted by jmfwxadmin in Blog
Keeping work pleasant

Keeping work pleasant

My office for working at home is in the conservatory. Although it has a solid roof now it can still be a little bit colder than the main house when outside it’s 0C.
I’ve created a monitoring system to check the temperature and when working, or overnight, stop the place getting too cold. I control a heater via a wi-fi connected plug and control that though it’s API. I even manage to capture the temperature changes and can see how good or bad things have been.

7-Day Temperature Chart

7-Day Temperature Chart

I have added “switches” to override the heating for various cases. Summer is coming so this should be used less…but it is only February so we’re not in the clear yet.

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Posted by jmfwxadmin in Blog
Solar & UV

Solar & UV

While the family was busy camping last week I determined how to add independent Solar and UV capability to my weather station setup.

I did this using two sensors from the ThePiHut.com

  • Grove Digital Light Sensor – TSL2561 (here)
  • Digital LTR390-C UV Ultraviolet Sensor (here)
Solar & UV sensors

Solar & UV sensors

With a small breadboard I was able to wire both of these into my Raspberry PI alongside the AQI sensor and CO2/VOC sensor. Each sensor has its own code (made into a daemon for 24×7 running) to report the values and write them to the /var/www/html directory so that they can be read across my internal network.

Using the custom.plugin option within my Meteobridge NanoSD I was able to directly read each value across the network to the Raspberry Pi using a simple “wget” statement and then map the additional readings to main readings for use elsewhere eg. “sol2!1rad –> sol0rad” and “uv2!1index –>uv0index”.

The readings from these can be seen in box 6 on my default weather display (here)

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Posted by Jason Farrow in Blog, Weather

UK Heatwave – July 2022

The UK heatwave set new records in all countries of the UK

Picture copyright of the BBC

My own station recorded a new high of 37.6C which then dropped some 13.6C the following day.

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Posted by Jason Farrow in Blog, Weather

NitroPack Plugin – Does what it says…

I was testing this blog site for performance on https://gtmetrix.com/ and it was getting poor results:

  • Grade C; Performance 65%; Structure 85%

This is not good. Almost two seconds for the first content to be visible. So I did a bit of googling and found out about NitroPack https://nitropack.io/ which is supposed to sort out performance issues etc.

Signed up for a free account and let it do its thing on my blog. The change was dramatic:

Yup. Every metric that matters is in the green. That’ll do.

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Posted by Jason Farrow in Blog

Giving up on GRAV

After much back’n’forth with FastHosts and the issues with the various levels of PHP support within GRAV I’ve opted to go back to WordPress as my CMS. This will take a while to re-build all the old entries but I was never a prolific blogger anyway.

Update: It actually took only about three hours to build the site and re-create all the blog posts from the GRAV backup. Whilst there is a WP to Grav tool there is no Grav to WP. It all had to be done manually.

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Posted by Jason Farrow in Blog
AQI Updated

AQI Updated

Another AQI update: This now incorporates data from the Davis Airlink to capture conservatory temperatures

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Posted by Jason Farrow in Blog, Weather

iPhone Mini 12 Time

After three years with my iPhone X I decided to upgrade. I’m still paying £15 for unlimited data so I still planned to buy the phone upfront.

So…why the Mini version? Because having considered all aspects the Pro and Pro Max are really for people who need the photograpy/videograpy capabilites, and the RAW format, that those phones have to offer. You are of course paying a premium for those features. That leaves the 12 or 12 Mini.

Having thoroughly reviewed the phones and what I do with mine on a daily basis, and the convenience of a smaller handset, the iPhone 12 Mini was the choice for me. It was also a lot cheaper than the others (in comparative Apple terms; you can get very decent Android phones for a quarter of the price of any iPhone) even after I’d opted for 128GB of storage.

Yes, like almost everyone else, I bought the blue version.

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Posted by Jason Farrow in Blog

AQI Update

I added another sensor via the Raspberry Pi. A SGP30 CO2 & VOC sensor. The updated page now looks like the above.

It does take some time to get the sensor to reach a baseline and start reporting. I think the CO2 baseline is still too high and it doesn’t move off 400ppm.

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Posted by Jason Farrow in Blog, Weather