I also recommend folks check out (and support!) Solar United Neighbors-- they're an advocacy group that helps navigate issues around solar install regulations and they run solar co-ops to get cheaper pricing by having people go solar together!

https://solarunitedneighbors.org

#solar #climatechange

On the plus side, once you've got your solar panels and associated support kit (batteries, inverters, etc...). They do tend to have a very good operating life, and as long as the atmosphere keeps letting sunlight through, will continue to generate power.

Maybe we should all be installing some more solar while the supply chains are functioning...

#Solar
3/3

Transport for London signs contract for 65GWh of solar per year

"TfL currently uses about 1.6 terawatt hours (TWh) of electricity each year, making it the largest single electricity consumer in London. Once operational, the solar installations could supply up to 65,000 megawatt hours (MWh) of renewable electricity each year — equivalent to roughly two-thirds of the Victoria line’s annual power consumption."

https://www.ianvisits.co.uk/articles/tfl-taps-our-largest-nuclear-fusion-reactor-to-power-the-london-underground-87986/

#solar #London #PublicTransit

30 months to 3MWh - some more home battery stats

Back in August 2023, we installed a Moixa 4.8kWh Solar Battery to pair with our solar panels. For the last year and a half it has chugged away slurping up electrons and sending them back as needed. Its little fan whirrs and the lights on its Ethernet port flicker happily as it does its duty.

I estimate that it has saved us around 3 MegaWatt hours since it was commissioned. In monetary terms, that's roughly £1,000 taken off our electricity bills.

How did I work that out? Well, maths is hard, as Barbie knows, so take all this with a pinch of monosodium glutamate.

Here's a typical month - October 2025:

Yikes! What's going on here?

We use a variable electricity tariff. Prices fluctuate every 30 minutes. At peak times our electricity prices can shoot up to 60p per Kwh. Overnight or when the wind is high, prices can drop to zero. Yes, free electricity! Sometimes the excess in the grid means that prices go negative and we are paid to use electricity. Hurrah!

Our battery knows this. Its Internet connection allows it to download the tariff for the day ahead and plan accordingly. If the electricity prices are cheap, the battery fills up. The battery can decide to discharge when we're using more electricity than solar provides, or it can wait until prices are more expensive after the sun has gone down.

Here's an example, again from October:

In October, about a third of the power stored in the battery came from the sun. About 92% was used by our house with the remainder being sold back to the grid if it was profitable to do so.

By contrast, here's June 2025 - a sunny month in the Northern Hemisphere:

Here, only 12% of the battery charging was done by the grid. 88% was done for free by solar power. But because solar was so plentiful, about 15% of the battery was sold back to the grid.

Maths. Is. HARD!

I've been playing around with various charts, graphs, spreadsheets, modellers, and a bit of calculus. I basically came to the conclusion that the easiest way was to assume I was saving the energy price capped value of a kWh.

That varies from 25p to 35p. If I fudge the numbers just right, it rounds off at an even grand.

It's Payback Time

No-one ever asks what the payback period is of buying a car vs taking public transport. You never see anyone amortising an engagement ring over the length of a marriage. Still, here we are.

We paid £2,700 for the supply, install, and commissioning of our battery.

That means the payback time for the battery will be between 6 and 7 years. If energy prices go up, the payback time goes down. Its capacity is showing no degradation yet and I hope it will provide us with many years of savings before it needs to be repaired or upgraded.

Solar batteries are getting cheaper and their capacity is getting bigger - although not big enough to store all my home's electricity.

If you can afford the upfront costs, it's like pre-paying for a chunk of your energy usage and can help protect you against sudden price rises.

You can sign up to Octopus and get a £50 bill credit if you want to switch to a variable tariff.

🆕 blog! “30 months to 3MWh - some more home battery stats”

Back in August 2023, we installed a Moixa 4.8kWh Solar Battery to pair with our solar panels. For the last year and a half it has chugged away slurping up electrons and sending them back as needed. Its little fan whirrs and the lights on its Ethernet port flicker happily as it does its duty.

I estimate…

👀 Read more: https://shkspr.mobi/blog/2026/02/30-months-to-3mwh-some-more-home-battery-stats/
⸻
#battery #moixa #solar

For I think the first day since probably October, we’ve had enough sun to recharge the batteries back to 100% after the heat pump hot water cycle first thing, plus cover our daytime usage 😀

And it’s still only Feb 👍

#solar

Hey, so, if anyone comes across useful information about #Solar, #Renewables, etc. on #USGovt websites, I would make the effort of archiving them on the #InternetArchive. They may not be up for much longer. (I just found some great information about Solar on farms, but I expect that to go away soon...)

#SolarPunkSunday #Censorship #USPol

#Solar is inevitable in #California and the entire #UnitedStates - thats why we support Scott Wiener’s Senate Bill 868 https://www.ewg.org/news-insights/news-release/2026/01/california-senator-introduces-balcony-solar-bill-lower-energy

#senatebill868 #solar #california

A company in #Wales which installed #solar power, #heatpumps and #insulation has gone into administration with all 300 #jobs lost..

https://www.itv.com/news/wales/2026-01-11/hundreds-of-jobs-lost-as-energy-firm-enters-administration

The Clean Energy States Alliance has published a report on “What States Need to Know about #PlugInSolar”.

The report is summary about #balconysolar from an #American perspective.

Although we think the German prices are calculated a little bit to high, because we think you can have installation cost as low as 0,28 EUR/Wp, its a good overview.

It also contains a cost return calculator for #solar on the balcony for #US Consumers.

Amongst other the report also mentions #CPAP machines as good examples for #emergencypower use, higlighting the systems ability to provide #electrictiy even during #grid failure, if you have battery!

https://balkon.solar/news/2026/01/10/us-plug-in-solar-cost-recovery-calculator/

Another test to see how stupid #Starmer and the current #Labour administration think the electorate are .

If he thinks he can water down proposed requirements to include batteries with new build homes and no one will notice he’s the short term thinking fool.

Most social housing tenants question why they are currently offered #solar panels but no battery storage.

https://www.theguardian.com/environment/2026/jan/02/ministers-may-cut-green-tech-mandate-from-new-homes-regulations-in-england

RE: https://freiburg.social/@balkonsolar/115754433974727816

At Germany’s equivalent of Home Depot you can get a 445 W solar panel for €69, an inverter for 109€ and mounting for 49€, cables for 29€. And this isn’t the cheapest offer.

#pluginpv #homedepot #solar #diy

I really will have to get a generator next year, no amount of panels will offset weeks of shit weather.

There are butane generators and the infrastructure here is really good for that (government price guarantees, local distribution sites)

From what I can tell from the docs of my inverter, if I run a generator and pass it into the AC in, it'll use part of the input and run it into the battery.

It's a low frequency inverter so the big-ass copper coil transformer should run both ways

#Solar

Things I'd do differently with my #solar / #battery / #heatpump if I'd known - #1....

I'd buy more battery. Not so much of an issue in summer due to the solar, but in winter we could easily time-shift double our current capacity (i.e. charging at cheap rate, discharging during peak rate).

As it is our 10kWh is usually done by lunchtime or early afternoon, especially when the heatpump is doing it's thing and it's a dull day.

Will know for next tine 🤷🏻

#Ecoflow #recall more batteries. Like the previous recalls it's relatively old tech. Unlike the last recalls it's getting a firmware update not a physical recall

Not clear if non US units are affected but these are older explody NCM battery cells not modern much safer LFP ones used in the Delta 2 or later I believe so this is not something you want to ignore.

https://www.cpsc.gov/Recalls/2026/EcoFlow-Technology-Recalls-Delta-Max-2000-Power-Stations-Due-to-Risk-of-Serious-Burn-Injury-and-Fire-Hazard

#solar #battery

I just read a news that the #solar boom in Pakistan coincided with the rapid depletion of water tables, perhaps a sign that capitalism will derail the #solarpunk revolution. I'm making a film that envisions a future where profit doesn't drive change, and clean energy happens with social justice. I need your support to make it 🙏 Share or donate if you can!

1430/2000

Details https://www.dilmandila.com/embracing-solarpunk-in-my-stories/

#crowdfunding #mutualaid #crowdfund #creativetoots #sff #scifi #science #buyIntoArt #art

Advice please! We think we have enough money to either a) swap out our gas boiler for an air-source heat pump or b) get solar. Which one is the best to prioritise? We're in the UK.

#solar #GreenEnergy #AirSourceHeatPump #zerocarbon

Australians to get at least three hours a day of free solar power - even if they don’t have solar panels

Labor announces ‘solar sharer’ program for households in NSW, south-east Queensland and South Australia

https://www.theguardian.com/australia-news/2025/nov/03/australians-to-get-at-least-three-hours-a-day-of-free-solar-power-even-if-they-dont-have-solar-panels

#News #Australia #Solar #electricity #Renewables

Cheap #solar panels are changing the world.

But there is a dark side to this technological progress. The consequences of relying too much on solar power could be devastating.

Read on:

https://shkspr.mobi/blog/2023/11/chapter-16-here-comes-the-sun-god/

#SciFi #ShortStory

Remember the massive blackout in Spain last year? When some people had no electricity for about 24h?

Back then, the blame was immediately put on renewables, pushing the claim that wind and solar are unreliable.

Well, the answers are in, and that was a big, fat lie by media beholden to the fossil fuel industry:

https://www.npr.org/2025/10/08/nx-s1-5534949/spain-blackout-misinformation-renewable-energy

Unfortunately, too many people believe this crap. The opposite is true: renewables paired with batteries stabilize the net.

#renewable
#solar
#blackout

It's widely reported that #China has been building out huge amounts of #solar photovoltaic generation, and of course that is a big contributor to slowing #ClimateChange. But what I discovered to my surprise this week is that China is also #Reforesting faster than almost anywhere else on Earth, which is an equally important contributor, and also contributes positively to the #Oxygen cycle.

https://ourworldindata.org/deforestation

@yogthos

I remember many people (mostly white folks) telling me that I'm crazy & have no idea what I was talking about - when I told them that while Global North kept ignoring opportunities for shifting to more #SolarPower & more #WindEnergy to move away from #FossilFuels as part of longterm #EnergyProducing plans/infrastructure, China was going to kick global ass with their full investments on wind & solar #AlternativeEnergy. I said that in 1996.

China became the world's leading installer of #photovoltaics in 2013. China surpassed Germany as the world's largest producer of photovoltaic energy in 2015 & became the first country to have over 100 GW of total installed photovoltaic capacity in 2017. As of 2024, Chinese firms are the industry leaders in almost all of the key parts of the solar industry supply chain, including polysilicon, silicon wafers, batteries & photovoltaic modules.

#WindPower remained China's 3rd largest source of #electricity at the end of 2021, accounting for 7.5% of total power generation.
China is forecast to have 1200 GW of combined #wind & #solar capacity by 2030 as part of the government's pledge to increase the share of non-fossil fuels in primary #energy consumption to around 25% by that year.

Both wind & solar energy industries in China have created thousands of sustainable jobs as well. They have boosted the Chinese economy from within.

#AsianMastodon #DivestFromFossilFuels #GlobalSouth #ChineseEnergyIndustry

Dear solarpunks, hackers, and off-grid nerds of all stripes, i have a solar related question for you:

a friend has a 24V solar setup with an mppt charge controller and inverter. unfortunately the batteries regularly go down to 24 (and overnight, sometimes even below that 😭 ). the inverter only gives a screaming alert when it's way below 24 and generally the people who use the system don't have a way to know if the batteries are getting too low.

do any of you have suggestions for how we might set up an alert for when the batteries are around 24.2? ideally it would send a text or something, but if it makes a really loud sound, that might be ok as well.

the inverter does make a sound when the system is too low, but that's when the batteries are way lower than 24 and we don't have a way to set any options for it.

the charge controller is a victron and there's a victron app, but i haven't seen an option in the victron app that's like... "alert if battery voltage hits x value."

anyway, our budget is limited, but any ideas you all might have would be most appreciated 🙏 🌞 ⚡

#solarpunk #solar #offgrid #diy #tech #SolarPower #hack #hardware

Anyone else around #Wirral #Liverpool going to see the Power Station film on Tuesday? https://power.film/ "Two artists in Walthamstow set out to take their street off the grid, kickstarting a #solar -powered energy revolution." #NewBrighton screening is 6pm https://newbrighton.thelight.co.uk/power-station #SolarPunk