Review: Moixa Solar Battery

by @edent | # # # # # # | 2 comments
A big white battery on a wall.

A few years ago, I took part in a local trial to install a solar battery in our home. The battery was excellent – and made a reasonable difference for our energy use. Sadly, last year, it died. It was prototype hardware, and these things happen. Moixa offered to replace it with an updated model…

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How to take solar export readings on the Honeywell AS302P smartmeter

by @edent | # # | Read ~808 times.
Honeywell Cumulative Export display.

I can’t find these instructions anywhere online – so I hope these notes help! The AS302P SMETS2 has two buttons. I’ve labelled the top button A and the bottom button B. Press the A button once to bring up the menu. The display should light up. It should show “General”. Press the B button. This…

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Hacking your Smart Meter – Part 1 – Zigbee

by @edent | # # # # | 6 comments | Read ~662 times.
Zigbee menu items.

I have a new Smart Meter to measure my electricity and gas usage. It’s the Honeywell AS302P. It’s a SMETS2 meter, which means it has a number of interesting features. ALCS (Auxiliary Load Control Switch) – this means that a car charger can be remotely started and stopped based on network demand. DCC connection –…

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Some thoughts on selling electricity back to the grid

by @edent | # # | 7 comments | Read ~189 times.
Email from Bulb saying they've set up an export payment.

I have solar panels! The UK mandates that my electricity supplier buys the surplus energy off me. They set a minimum price, known as the SEG (Smart Export Guarantee). My supplier – Bulb – pay me 5.38p for every kWh I export. I pay them about 13p for every kWh I import. You notice the…

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How much should it cost to charge a car?

by @edent | # # # # # | 2 comments | Read ~171 times.
A large electrc charger with the Shell logo on it.

Back when nuclear power stations were first proposed, we were promised “energy which is too cheap to meter”. That is, the cost of electricity would be so low, invoicing for its use would be prohibitively expensive. Well, that didn’t exactly turn out that way! But as our electronics have become more efficient, the cost of…

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Review: Shell Recharge

by @edent | # # | 3 comments | Read ~998 times.
Colour screen showing battery charging.

Even when I had a petrol car, I boycotted Shell – refusing to use their petrol stations. I thought that would continue once I got an electric car – no dino-juice for me! My car has more than enough range for me, but on a recent journey I decided it would be prudent to do…

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Is a smart electricity tariff worth it?

by @edent | # # # # | 6 comments | Read ~3,012 times.
A graph of energy consumption.

(Long and data-filled post ahead!) I’ve switched to energy provider Bulb (£50 off if you join using that link). They offer a “peak time” electricity charge which looks like this: 23:00 to 07:00 = £0.0815/kWh 07:00 to 16:00 = £0.1235/kWh 16:00 to 19:00 = £0.3263/kWh 19:00 to 23:00 = £0.1235/kWh By contrast, the standard tariff…

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Real fuel efficiency of an electric car? 165MPG

by @edent | # # # | 2 comments | Read ~281 times.
Trip counter on a car.

I’ve been driving EVs for a few years now – and people often ask me about running costs. I can’t tell you what your insurance, maintenance, or leasing costs will be – but I can show you how much it costs to drive. Here’s a fairly recent trip in my Renault Zoe: That’s a mixture…

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Reverse Engineering the Renault Zoe API

by @edent | # # # # # | 32 comments | Read ~6,050 times.

Last year I published details of the BMW i3’s API. I’ve now swapped my i3 for a Renault Zoe – so I thought I’d perform the same exercise. 🔋 100%🚗 76 miles🔌 Plugged in⚡ Not charging⚠ Secured and Locked#RenaultZOE — edent's Car (@edent_car) October 15, 2016 All these API calls can be found by using…

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AC DC AC DC AC DC AC DC

by @edent | # # # | 5 comments | Read ~1,280 times.

My solar panels deliver pure Direct Current electricity into my house. All my house has Alternating Current circuits. Therefore, I need an inverter to change the DC to AC. This is inefficient. Most of the electronic devices I own are powered by DC. So I plug little wall-warts into the AC sockets to convert back…

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