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Claude Code Unpacked : A visual guide

https://ccunpacked.dev/
671•autocracy101•8h ago•211 comments

Show HN: Sycamore – next gen Rust UI library powered by fine-grained reactivity

https://sycamore.dev
19•lukechu10•55m ago•12 comments

CERN levels up with new superconducting karts

https://home.cern/news/news/engineering/cern-levels-new-superconducting-karts
210•fnands•5h ago•50 comments

Is BGP Safe Yet? No. Test Your ISP

https://isbgpsafeyet.com/
6•janandonly•15m ago•0 comments

I Quit. The Clankers Won

https://dbushell.com/2026/04/01/i-quit-the-clankers-won/
153•domysee•4h ago•104 comments

Intuiting Pratt Parsing

https://louis.co.nz/2026/03/26/pratt-parsing.html
61•signa11•2d ago•13 comments

Show HN: CLI to order groceries via reverse-engineered REWE API (Haskell)

https://github.com/yannick-cw/korb
128•wazHFsRy•2d ago•48 comments

Claude Wrote a Full FreeBSD Remote Kernel RCE with Root Shell (CVE-2026-4747)

https://github.com/califio/publications/blob/main/MADBugs/CVE-2026-4747/write-up.md
97•ishqdehlvi•8h ago•32 comments

Wasmer (YC S19) Is Hiring – Rust and DevRel Positions

https://www.workatastartup.com/companies/wasmer
1•syrusakbary•1h ago

Chess in SQL

https://www.dbpro.app/blog/chess-in-pure-sql
100•upmostly•3d ago•21 comments

A dot a day keeps the clutter away

https://scottlawsonbc.com/post/dot-system
401•scottlawson•16h ago•114 comments

Show HN: 1-Bit Bonsai, the First Commercially Viable 1-Bit LLMs

https://prismml.com/
313•PrismML•16h ago•123 comments

TinyLoRA – Learning to Reason in 13 Parameters

https://arxiv.org/abs/2602.04118
200•sorenjan•5d ago•26 comments

TruffleRuby

https://chrisseaton.com/truffleruby/
150•tosh•3d ago•16 comments

CEO of largest public hospital says he's ready to replace radiologists with AI

https://radiologybusiness.com/topics/artificial-intelligence/ceo-americas-largest-public-hospital...
9•thunderbong•26m ago•7 comments

Consider the Greenland Shark (2020)

https://www.lrb.co.uk/the-paper/v42/n09/katherine-rundell/consider-the-greenland-shark
5•mooreds•5d ago•0 comments

MiniStack (replacement for LocalStack)

https://ministack.org/
257•kerblang•16h ago•48 comments

The Claude Code Source Leak: fake tools, frustration regexes, undercover mode

https://alex000kim.com/posts/2026-03-31-claude-code-source-leak/
1247•alex000kim•1d ago•504 comments

Why the US Navy won't blast the Iranians and 'open' Strait of Hormuz

https://responsiblestatecraft.org/iran-strait-of-hormuz/
404•KoftaBob•1d ago•1076 comments

Neanderthals survived on a knife's edge for 350k years

https://www.science.org/content/article/neanderthals-survived-knife-s-edge-350-000-years
180•Hooke•12h ago•134 comments

Bring Back MiniDV with This Raspberry Pi FireWire Hat

https://www.jeffgeerling.com/blog/2026/minidv-with-raspberry-pi-firewire-hat/
76•ingve•3d ago•14 comments

Slop is not necessarily the future

https://www.greptile.com/blog/ai-slopware-future
266•dakshgupta•22h ago•423 comments

In Case of Emergency, Make Burrito Bison 3 (2017)

https://juicybeast.com/2017/08/03/in-case-of-emergency-make-burrito-bison-3/
16•amarcheschi•1d ago•6 comments

OpenAI closes funding round at an $852B valuation

https://www.cnbc.com/2026/03/31/openai-funding-round-ipo.html
473•surprisetalk•17h ago•427 comments

4D Doom

https://github.com/danieldugas/HYPERHELL
232•chronolitus•4d ago•57 comments

Open source CAD in the browser (Solvespace)

https://solvespace.com/webver.pl
344•phkahler•1d ago•109 comments

A Mysterious Numbers Station Is Broadcasting Through the Iran War

https://www.wired.com/story/a-mysterious-numbers-station-is-broadcasting-through-the-iran-war/
29•thinkingemote•1h ago•30 comments

6o6 v1.1: Faster 6502-on-6502 virtualization for a C64/Apple II Apple-1 emulator

http://oldvcr.blogspot.com/2026/03/6o6-v11-faster-6502-on-6502.html
18•classichasclass•3d ago•0 comments

Axios compromised on NPM – Malicious versions drop remote access trojan

https://www.stepsecurity.io/blog/axios-compromised-on-npm-malicious-versions-drop-remote-access-t...
1871•mtud•1d ago•753 comments

Ordinary Lab Gloves May Have Skewed Microplastic Data

https://nautil.us/ordinary-lab-gloves-may-have-skewed-microplastic-data-1279386
122•WaitWaitWha•16h ago•43 comments
Open in hackernews

Solar panels at Lidl? Plug-in versions set to appear in shops

https://www.thisismoney.co.uk/money/bills/article-15673955/Solar-panels-Lidl-Plug-versions-set-appear-shops-MONTHS.html
37•ZeljkoS•4h ago

Comments

muskstinks•1h ago
I have one on my balcony. 400 Euros and it saves me 10% of my energy bill.

works well and is probably now refinanced.

lnsru•1h ago
Which energy bill? Monthly or yearly?
progbits•1h ago
Beautiful thing about percentages...
oneeyedpigeon•1h ago
Yeah, "how much is 10% of your energy bill" would be a much more useful question!
tbrownaw•1h ago
Well, "yearly", "monthly, in the summer", and "monthly, in the winter" could plausibly all be different numbers.
latexr•1h ago
It’s the same thing. Say you have a bill of 120€/year. On average that comes to 10€/month (120€ divided by 12 months). If you have save 10% a month you save 1€, which after 12 months becomes a saving of 12€. Now do that yearly: 10% of 120€ is… 12€.
citrin_ru•1h ago
10% of saving for July's or August monthly bill will give less than 10% saving for the year as in the winter solar output is lower.
Hamuko•1h ago
Are you paying for electricity and transfer on a separate schedule or something?
creddit•1h ago
Secondly unfortunately
muskstinks•1h ago
I pay 100 Euros per month energy bill and save 10% of it so 10 Euros per month or 120 Euros per year.
jstsch•1h ago
Every installed PV-panel is a dozen barrels of oil (eq.) less CO2 in the atmosphere. Plus, so much fun to generate your own power! Can highly recommend it, even starting small.

It's addictive though. Living in the center of the city (The Hague, NL), with a home battery, I'm now 100% self-sufficient electrically for 10 months of the year.

leonidasrup•1h ago
How many barrels of oil (eq.) are required to manufacture and transport the PV panel?
jacknews•1h ago
Fewer and fewer, as the whole world electrifies.
Fokamul•1h ago
That's 3rd world country problem, British people (with salary in top places of Europe) must save money!
pch00•1h ago
Britain has the 8th-most expensive electricity in the world[1], seems prudent that a Brit would try to be more self-sufficient in terms of generation?

[1] https://worldpopulationreview.com/country-rankings/cost-of-e...

Fokamul•25s ago
Ok.

On your map, let's say the source is valid, UK has $0.4 I'm from CZ, on your map we have $0.35.

UK has more than double median salary, DOUBLE. Which means that in some cities it will be actually more like 2x or 3x smaller. But price of electricity is more or less same in the whole country here.

Don't tell me something about expensive electricity and saving money. Because on top of that, let's check affordable housing stats

https://worldpopulationreview.com/country-rankings/affordabl...

Yep, one of the worst in EU, yaay.

guntars•1h ago
If you are curious about it, why don’t you go and find the answer and then let us know too, no?
ceejayoz•1h ago
It’s a new account that has posted only pro nuclear and anti solar/wind stuff since its inception.
_aavaa_•1h ago
Less than it takes to manufacture and transports the barrels of oils it replaces.
muskstinks•1h ago
Its estimated that a PV panel is co2 neutral aver 2 years.

And the great thing is: this is only if the panel was produced with fossil fuels. So due to increase in green energy everywere, this number goes down too and a PV can easily be used for 15 years and after. After that it might just be more economicly to reinvest in a new set of PV panels while the old ones can be sold and used somewere else.

yenepho•1h ago
I think (obviously) the OP is implying a net save here.
kstenerud•1h ago
The oil payback (in terms of the panel and associated gear) is about 1.5 years, with a 25-30 year lifetime operating window.

This is with today's efficiencies. They are of course improving.

Epa095•1h ago
The usual carbon payback period for solar panels is 1-4 years.
projektfu•1h ago
About 1/10 or so of the output of the panel, e.g. 1 barrel of input energy making and transporting panels saves 10 barrels in fossil fuel energy. That's a rough number assuming a particular mix of oil based energy and no energy cost to procuring the fossil fuels used in the comparison.
SCHiM•1h ago
Hey jstsch, would you mind answering some questions?

- Did you need/use an electrician to set this up? - How much KWh capacity do your batteries have? - What about fire safety? Did you install outside, or inside? - I assume dec/jan are the months you're not fully self-sufficient, are you allowed to charge from grid to do arbitrage over time, or is that another can of worms?

hkpack•1h ago
I tried to set up Bluetti solar panel on my balcony in a similar way, but the efficiency was abysmal because of the angle to the sun.

I wonder for how many people it will work in practice?

Putting panels on the roof should be much more efficient…

Klaster_1•1h ago
Man, I'd buy these in a heartbeat if our local Cyprus regulations allowed for these. Participating in green transition as an immigrant renter sucks.
raphaelj•1h ago
We legalized these in Belgium last year.

I bought a 1600Wc + 1.9KWh kit (Ecoflow Stream) for +/- 1300€ last summer. It took us about 2h to install (we had to setup a new plug outside), and I already saved 200€+ since July. I am expecting to save about 350€ per year.

Also, as u/jstch said, it's extremely fun to setup and generate your own power!

gib444•1h ago
A 3.7 year ROI would be incredible (and fairly uncommon AIUI)

South facing?

raphaelj•1h ago
House is facing South, but I'm laying them flat on the floor for economic and aesthetic reasons, with some 3D printed brick-based ballast [1].

Buying supports for PV is actually less economical than buying additional PV panels.

--

[1] https://imgur.com/a/tDPevmM

muskstinks•1h ago
Mine was around 4 years and its west south + a tree in the middle. So spring and autom the tree is no problem but in summer lunch hpeak there is shadow on it.
Fokamul•1h ago
And how does it work there?

You have special electric meter and you are distributing solar power into the grid outside of your household?

Or you don't distribute electricity into the grid?

raphaelj•1h ago
You have to register to the utility, but that's just a form to fill with the model and power of the kit.

With a e-meter, you will get compensated when you're generating a surplus (+/- €0.04/kWh last time I checked).

However, thanks to the battery, I'm self-consuming almost all that electricity, saving around €0.30/kWh.

Expect 800kWh of annual production per 1kW of panels.

pjc50•1h ago
The special definition of "balcony solar" is that it avoids most of those requirements. It seems this is usually done by adding a clamp meter to the input to the house, which sends a control signal to the panel inverter over Wifi to reduce output if it would be feeding back.

(this is country dependent)

ragebol•57m ago
My guess as a Dutch guy, not 100% familiar with our neighboring country's rules etc): Yes, exporting to the grids. If a house has an old Ferraris meter, it will rotate backwards or a new, smart(er) meter, that has a separate counter for delivery back to the grid.
gib444•1h ago
I don't mean this lightly: you absolutely can not trust the average Brit to safely install these on a balcony.

If they think they can get an ounce more sunshine, they'll hang it over the edge, badly

yostrovs•1h ago
I've been seeing headlines of this sort last few weeks. It points to Europe preparing for the next time the Hormuz is blocked off. But are there actual actions taken beyond those that save 10 percent on an apartment's electricity bills? Are there large scale mitigation measures that would actually soften the impact of another energy shortage in a serious way?
Fokamul•1h ago
How is this handled in your country? We're talking only about solar panels which plugs directly into your main.

Because here, small country in EU, this is not allowed since it would mean ridiculous investment into electric infrastructure.

It's heavily regulated and you need special electric meter, license, etc. and still price of electricity is negative in certain times during the day, because everyone who could, got their solar power plant from EU subsidies.

bildung•1h ago
In Germany there was zero investment into the electric infrastructure, but the power allowed to flow from the panels into the grid is currently limited to 800W for this type of system. Seems to work fine. Larger systems still need a license.
Hamuko•1h ago
Seems like they're illegal as hell in Finland.

https://tukes.fi/-/ala-kayta-pistorasiaan-kytkettavaa-aurink...

If you want solar panels without having to get an electrician, you'd need to connect them to a battery that's not connected to the mains.

afh1•1h ago
Why do Europeans need permission from their governors to buy solar panels? I bet you also need to pay taxes on the energy you generate even though you alleviate the infrastructure need.
mememememememo•1h ago
If you pay tax on generated energy they would have to let you deprecate the cost of the panel as a cost. Would be interesting as to where that lands and if it makes much tax revenue at all.
Fokamul•1h ago
I think this is ridiculous misconception, never heard of that you cannot buy solar panels in EU.

The post is about permission to plug solar panels into your main electricity.

Eg.: Small EU country, definitely not allowed and under huge fines. Without proper equipment, solar power plant license etc. etc.

kstenerud•1h ago
Because those "governors" need to first ensure that their grids and home electrical systems are equipped to handle a solar system pumping into the house power system.

You speak as though that were a bad thing. I'd rather not have people accidentally burning their houses down.

Once it's approved for an area, you go to your local shop, buy an approved PV system, and plug it in. No fuss, no worries, and your insurer must cover it.

pjc50•1h ago
Everywhere has electrical safety regulations.
lukaslalinsky•1h ago
You need permission to connect it to the grid.
mememememememo•1h ago
Any dangers from plugging this in to a socket?

Does it need its own earth? Will it switch off if it detects a residual current? Can it handle spikes in load?

muskstinks•1h ago
No your normal socket can be used the other way around without issues and that reverse load doesn't create a problem.

Its even reducing your load on your main line beause the energy directly flows into the next consumer.

German socket has earth, thats fine. It has protection mechanism and shuts down if it can't sync to the powergrid. The panels only produce (in peak!) 400-800 watts. Thats not an issue.

kleiba•1h ago
In Germany, where Lidl is originally from, you can already order them online in their store. This is a variety for your balcony: https://www.lidl.de/p/vale-gmbh-balkonkraftwerk-ecoflow-860-...

Product Features:

- Name: VALE MiniPV 880-EF8N

- Control: Free App

- Communication: WiFi 2.4 GHz

- Performance: max. 800 W

- Tension: approx. 230 V

- Frequency: 50 Hz

- Power supply: Solar inputs: up to 60 V, mains current 230 V

- Protection rating: IP67

- Material: Solar modules: glass and aluminium frame

- Inverter: Cast aluminium

- Dimensions: approx. L 172.2 x W 113.4 x H 3 cm (per solar module) approx. L 25,3 x W 22.2 x H 3.5 cm (inverter)

- Weight: approx. 56 kg

- Scope of delivery: 2 x Premium solar panels, each 440WP, Black, Bifazial; 1 x Premium inverter 800 Watt with WiFi; 1 x connection cable (5 m), safety plug; Quick start guide

timonoko•1h ago
Last time I bought a panel from Lidl, it worked only on very sunny day. Very Strange.

Inspection revealed it had two 6 Volt 10 Watt panels in parallel and then 12V to 5V USB-converter.

When panels were reconnected in series it was quite OK.

muskstinks•1h ago
What do you mean? Do you mean small solar panel for smartphones? Because the panels in the article are over a square meter big. Mine make 200-400 watts on sunny days
timonoko•1h ago
Yes. But 20W panel is panel too.

Little worried about Lidl-quality also on larger scale.

gcanyon•1h ago
For anyone curious, it appears that quality/output varies widely. Here's a video review of some smaller panels by Project Farm: https://www.youtube.com/watch?v=bVkJKCoRATs
singularity2001•45m ago
Wouldn't it make much more sense to deliver them with a battery? How would you connect a battery to such system?
ajb•6m ago
The UK regs update[1] mentions a battery, but you have to pay for it so I don't have the details.

It appears your could legally install one of these panels on the 15th of this month, but there presumably won't be any certified to comply with the regs on sale yet.

[1] https://electrical.theiet.org/amendment-4-updates-to-18th-ed...

raddan•40m ago
How does panel shut-off work for emergency responders? Where I live, a solar energy system is required to have a shut off switch. For example, my system has a big red handle mounted on the side of the house. This is important not just for first responders like firefighters but also for linemen repairing downed lines, which are pretty common where I live (a mountainous rural area).

Given that these store-bought panels are being plugged into house AC, it follows that they have built-in inverters. Many grid-tied inverters are “grid follow”, meaning that they adjust themselves to grid frequency/phase. So, just speculating here… maybe the inverter senses when the mains go down and turns itself off? I would love to know from an EE what is actually happening wrt safety.

raphaelj•31m ago
These inverters have to switch off if they cannot detect a grid signal, or if the grid frequency/voltage goes out of the safe range.

Same legislation as the non-plug&play inverters.

cillian64•31m ago
It'll be the same as larger inverters for roof-top solar - they are constantly monitoring the mains cycle and will shut off if the voltage (or probably frequency too?) goes out of range, let alone drops out entirely. The relevant standards in the UK are G98/G99.