Ben Campbell

@SachinderSaini @g__j They can work in reverse, it's just not effective with radiators and needs pipe lagging.

@g__j The government again is very short sighted. Heat pumps that heat water cannot work in reverse and are offered a grant of £7500 grant. Air to air heat pumps that can heat and cool are only offered £2500 grant only as these are considered a luxury. why?

On the alleged battleground of air conditioning: 1) it is increasingly important in the uk 2) it’s the perfect complement to solar - great! Not too much in way of emissions - build more solar and more ac* 3) solar is very cheap if you can use when it’s sunny… ac is the perfect complement to solar too 4) it’s not banned here - but it should be more welcome (as should heat pumps) and some local authorities are a bit ott but local rules can be crazy all over the world - it’s illegal to pump your own gasoline in New Jersey, for example (here in Britain we are allowed to do it ourselves) 5) it’s pretty odd to argue that climate change isn’t real but also argue it’s increasingly important to have AC. And very fringe to argue that climate change is real but somehow a total coincidence wr to our emissions of greenhouse gases. 6) more ac with more solar could help reduce elec costs. We need more elec usage to spread the extortionate fixed costs over. Elec consumption is down 20% over 20 years.. * yes, I know that solar doesn’t work when it’s dark, whilst ac can still be needed. But other loads start to fall after 7pm. Domestic solar is now usually paired with domestic batteries too.

The latest Proxmark3 release is called BREAKMEIFYOUCAN! Not a random name. That is the actual 3DES factory default key NXP burned into every MIFARE Ultralight C they shipped since 2008. Somebody finally broke it properly. The paper drops the keyspace from 2^112 down to 2^28. Counterfeit cards fall in under 60 seconds from a single card interaction. The tooling is merged: github.com/RfidResearchGr… #Proxmark3 #RFID #NFC #MifareUltralightC #NXP #OpenSource

This is bad. Putty level bad. notepad-plus-plus.org/news/hijacked-…

I've published a very simple tutorial on exploiting this for RCE on the wonderful @iximiuz. You can try it out here: labs.iximiuz.com/tutorials/node…

@B_UK70 @g__j This is an excellent example of misquoting and misleading by City AM

@g__j There is nothing to love about self harm. Net Zero leads only to energy scarcity, ever higher bills, deindustrialisation, job losses, poverty, restrictions & blackouts. It is simply not in the national interest. #RepealtheCCA

Whether you hate net zero or love it, you should hate this sort of thing. It’s not an accident but a business model Some “investors” are not building renewable generation - they’re gaming a system Everyone loses- consumers, businesses, the planet

@JohnRim61105524 @KateFantom Taxis require 2 MOTs annually.

@KateFantom Just wondering how a 6 year old car has had 11 MOTs + MG didn't produce EVs before 2018.

These pesky, cheap, Chinese, electric cars. We’ve just bought this for next to nothing. In its 238,000 miles as a taxi it’s had no repairs. Check out the front pads 😮 It’s failed one of its 11 MOTs on a number plate bulb. It does now need a few things doing, which is why we have it, but non of these things are the traction battery, motor, inverter or the onboard charger. SOH ❤️👌🏼 It still drives like a champ 👍🏼

@KathrynPorter26 @g__j Can you declare that you're not funded by fossil fuel interests to shill on twitter?

@g__j Perhaps you could declare your conflict of interest and explain how locational-pricing would increase revenues and profits in your Kraken software subsidiary

In the Sunday Times I explain how zonal pricing reduces costs - even without *any* relocation. More details here… (it’s so important on a debate like this to explain the analysis, not just the headline claims) youtu.be/bcKKcTM1K48?si… thetimes.com/business-money…)

@britdesi9 @g__j The closure of Ratcliffe was decided in 2015 🤦‍♂️

It's hilarious when trolls, russians and people with anonymous accounts accuse clean energy people of being grifters. They should see the oil and gas grift. It cost you £100bn in the crisis and £17m in 3 hours last week. There've been fossil fuel crises since I was a kid.

Oh, you didn't know? Cool kids are now relaying Kerberos over SMB 😏 Check out our latest blogpost by @hugow_vincent to discover how to perform this attack: synacktiv.com/publications/r…

@Dillinja31 @cdkeyscom_en There's two 15 digit codes second one for DLC. Don't copy and paste both.

@cdkeyscom_en The wait certainly isn't over, invalid code

@jduck Not anything to do with you then?

Just was shown someone trying to impersonate me on GitHub. Please don't be fooled and find the correct place github.com/jduck. Thanks mihi for pointing it out.

Teaching the Old .NET Remoting New Exploitation Tricks – read how @mwulftange developed novel techniques to exploit Apache log4net's hardened .NET Remoting service: code-white.com/blog/teaching-…

@UK_Daniel_Card Ah I see the new option!

@Meatballs__ Yes it’s the built in local administrator account

why is this server not being pwn3d?

@borpin @robsmallshire @home_assistant Dishwasher/washing machine automated to come on during cheapest octopus agile period overnight. Probably never recoup the additional purchase cost with the efficiency of modern appliances though 😅

@robsmallshire If an open API, then I'll trigger it using @home_assistant at cheapest period for electricity. Otherwise zero use.

But the point is, I’ve forgotten. What is the use case for being able turn a dishwasher on remotely, enough for it to be able to tell me that I need to press a physical button in order to start it remotely? #InternetOfShit

@PluckleySave Curry and rhubarb compote sounds delightful

Ok so we managed to hit peak import at 3:15 at 20KW! And that was after using our solar and battery as well (so around 7KW). So 27KW of usage peak estimated. And just over 31KWH during plunge hours. Showers Cooking - curry and rhubarb compote Both ovens pyrolitic cycles Car charged Dishwasher - two loads Washing machine load I think!

@PluckleySave Far more than 100A for short periods. 200A for 400s? 😅

I have a 100 amp main fuse for the electrics in my house. What’s the most I can draw at any one time before tripping? I guess at 230V then with a 100AMP fuse then I can use 23kW max at any time? (Regardless of whether it is import or solar generated?)

@theolodian If you have backup via A2A just drop a few room target temps down a degree or so? Are bedrooms already at 18?

@Zarch1972 @energystatsuk @Openenergymon @Damon_BPHR @CustomRenewable @plumbers_urban @_heatgeek @_ChiefGeek @Si_Poskett @cbrookesheating @betateachpod @glynhudson @TrystanLea @Protons4B COP/SCOP should be an aid to checking performance but it's not the end goal. If you have offpeak tariff periods you will be better off sacrificing efficiency for cost. Turn on heating earlier in year and get better SCoPs due to use in warmer weather etc.

As part of a forthcoming Arotherm deep dive article on @energystatsuk (that i'm planning on writing) , I wanted to know why my 5kW model isn’t top of the @openenergymon SCOPs despite @Damon_BPHR and I doing everything by the book (open system, low flow temp, weather comp etc). I've come to the conclusion that the 5kW model is simply not physically capable of performing as well as the larger output models. This is why you’ll see the larger models start to dominate those SCOP charts. The following graphs i've created show a variety of stats at flow temps 30C to 35C (where you'd want a well designed system to spend most of the winter). All info taken from Vaillant technical documents and charts. Over the past 365 days since install I have personally recorded an overall heat/DHW COP of 3.6 emoncms.org/energystatsuk So i’m running the 5kW at its bare minimum output most of the winter. And as per these graphs, that doesn’t help the 5kW model at all. Look at the COP drop off at 7C outside when you run it minimum compared to just a little more heat output. I believe my COP is lower as I don't have the system capacity (radiator volume to lose enough heat). ie, 2.1kW heat out at 7C outside gets you COP 4.1, whereas being able to output 2.9kW at 7C gets you COP 4.6. Small amounts, but running minimum output when between 3C and 9C (ie most of the winter) takes a COP hit? This is not helped by my heat loss only being 4.1kW at -3C outside. If that was higher, could I lose more heat? @RickmanHeat gets amazing performance out his 5kW Arotherm on the charts as that house is twice the size of mine, so more ufh/rad capacity means he's always throwing 3kW of heat into the system (getting the premium COP). And his design is 31C at -3C outside, which helps!! 🤪 I plan on writing all this up with some graphs / evidence, but was interested in getting some initial thoughts and whether this is seen out in the field? I'm putting the whole problem down to the heat pump compressor needing a minimum amount of electric regardless of what it is doing. And because the bigger models have more headroom (heat output potential) the Heat Output divided by COP (to get electric input) makes for a better outcome? If that makes sense? If it doesn't, what's your take on this? Luckily for those of you with 7kW, 10kW and 12kW models, the 'minimum output' problem doesn't seem to exist, at least not in the stats / graphs that I can see. And is this just an Arotherm thing? I don't think so, as @glynhudson hits a similar issue with his 5kW Samsung where he gets better cop by throwing 35C flow at it constantly and ignores weather comp to some degree. Deep for a Sunday morning I know. 🤣

@johntisbury @glynhudson The paper I read didn't have anywhere near that kind of difference. And tboe performed the worst at low flow temps? epj-conferences.org/articles/epjco…

This is what happens when a radiator is piped diagonally with the flow into the bottom, it doesn't work! Counterintuitive, (at least for me!) flow needs to go into the top, luckily it's easy to fix 🤦‍♂️