A weird solar blockchain thing – Rowan Energy

by @edent | # # | 1 comment
Using Blockchain to encourage green energy is not viable due to the incredible amount of energy it takes to mine transactions.Our blockchain is a POA (proof of authority) blockchain that is designed to run on ultra lower powered devices. The devices are in the home of our supporters and take only about $10 per year to power.

I blog about my solar panels – probably a bit too much! Recently, a reader asked me if I’d heard of Rowan Energy‘s solar payback scheme – so I took a look into it. Here’s how it works: Rowan installer a “miner” next to your solar inverter (the big box that turns DC from solar…

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Which generates more electricity – East- or West-facing solar panels?

by @edent | # | 2 comments | Read ~108 times.
Graph showing the difference between east and west panels.

We’ve had our solar panels for exactly a year. Our roof has an East/West aspect – and we have 250kW of panels on each side. Here’s a typical graph showing how each side performs during the day. East facing solar panels 🆚 West facing solar panels. London, UK. pic.twitter.com/JBcd5KPGyJ — Edent's Solar Panels (@Edent_Solar) March…

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1 year of @edent_solar. We are 100% offset!

by @edent | # # # # | 2 comments | Read ~178 times.
A generation meter.

Our domestic solar panels have generated more electricity in a year than we have consumed. We installed 5kW of solar panels on our roof in 2020. Half are East-facing, half West-facing. Over a full year, they’ve generated 4,165kWh. By comparison, the average UK household uses about 3,800kWh of electricity per year. But working out exactly…

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Review: Moixa Solar Battery

by @edent | # # # # # # | 4 comments | Read ~472 times.
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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Six Months of Solar Power Stats

by @edent | # | 5 comments | Read ~180 times.

We’ve had our new solar panels for 6 months. Here’s how they’ve performed over summer. 3,361 kWh Generated 2,445 kWh Exported ===== __916 kWh Consumed Despite working from home every day, using laptops, monitors, microwaving lunch, we only used about 5.5kWh of solar each day. About 72% of our summer generation was sold back to…

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1,800 days of minute-by-minute solar generation as Open Data

by @edent | # # | 6 comments | Read ~292 times.
Solar panels on a roof.

Back in 2014, I released a year’s worth of solar generation data. I was enormously proud to recently discover that the data were cited in a couple of academic papers: Colantuono, Giuseppe & Kor, Ah-Lian & Pattinson, Colin & Gorse, Christopher PV with multiple storage as function of geolocation (2018) page: 217-232. Elsevier BV. Solar…

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Happy Solstice from @edent_solar

by @edent | # | Read ~136 times.
Solar panels on our roof.

Today is the longest daylight of the year. We had our new solar panels installed just after the vernal equinox – so now seems to be a good time to check in on how they’re doing. (Who am I kidding – I look at their output several times per day!) Today I generated 24.35kWh of…

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Comparing Solar Panel Generation – East/West split

by @edent | # # | 8 comments | Read ~245 times.
A graph of two solar generators. Both are fairly even.

We have just installed solar panels on our house in London. We also had panels on our old house in Oxford. How do they compare? Oxford London Latitude 51.753738 51.486880 Panel Size 4000 Watts 5040 Watts Orientation South East/West Split Obviously, it’s hard to compare exact weather conditions – lower temperature makes for more efficient…

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Relaunching @edent_solar. Part 5 – Getting data out of Fronius Solarweb

by @edent | # # # | 4 comments | Read ~162 times.
A big grey box with lots of wires coming out of it.

Mostly notes to myself. My solar panels have an open API. But it’s only available if I’m on the same network as the Fronius inverter. I can connect my system to https://www.solarweb.com/ so I can access it anywhere in the world – if I have the right password. SolarWeb has an (optional) guest mode. You…

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Some thoughts on selling electricity back to the grid

by @edent | # # | 7 comments | Read ~257 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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