Technology is a beautiful, magical thing right up until the exact moment it decides to stubbornly refuse to do the one thing it was explicitly designed to do.
A little while ago, I mentioned on here that we finally pulled the trigger and ordered a plug-in home battery. It’s a modest little powerhouse—a 2.8 kWh capacity, drawing power at 800W and discharging at the exact same rate. We absolutely could have gone the cheaper route and ordered something mass-produced from far away, but we intentionally opted for a "Made in Europe" model. Yes, it cost a bit more upfront, but it comes with the massive advantage of actually being officially approved for the Belgian power grid. Peace of mind is priceless, right?
Well, yesterday, the battery finally arrived in all its European-engineered glory. The P1 connector dongle—the little gadget you plug directly into your smart meter—had actually arrived a week earlier. If I possessed the superpower of hindsight, I would have installed that little green ring of plastic the moment it hit the doormat to iron out the kinks. But alas, I saved it all for the grand installation day.
Because dealing with electricity and expensive new hardware is somewhat delicate, I did something highly unusual for a Saturday DIY project: I actually read the manual before starting. The game plan was elegantly simple. Six steps to absolute energy independence:
Plug the battery into a standard wall socket.
Turn the battery on.
Plug the P1 dongle into the smart meter.
Download the HomeWizard app.
Connect the P1 dongle to the app.
Connect the battery to the app.
Simple, right? What could possibly go wrong?
As it turns out, when technology works, you feel like a futuristic wizard commanding the elements. When it doesn't, you realize you've just bought a front-row ticket to Murphy’s Law. We had, once again, drawn the winning lottery ticket of technical difficulties.
Steps one through four went off without a hitch. I was feeling pretty smug. But the moment I tried to connect the P1 dongle to the app, a cheerful little pop-up informed me that a new firmware update was available and absolutely had to be downloaded before proceeding. Full of naive optimism, I tapped "Install." Thirty seconds later, the app rudely spat back an error: Device cannot be updated.
"No problem," I thought, brushing off the minor inconvenience. I simply moved on to connecting the home battery to the app instead. That actually worked perfectly! Everything was looking great... right up until the app politely informed me that the controller (the P1 dongle) required an update before it could actually communicate with the battery.
You can see exactly where this is going. Another attempt at updating the P1. Another swift, unceremonious failure. I was trapped in the ultimate digital catch-22: the app needs the dongle, the dongle needs the update, the update refuses to install, and the battery sits there mocking me. After a few more futile attempts, I accepted defeat for the evening, poured myself a drink, and walked away.
This morning, armed with strong coffee, I dove into the internet’s troubleshooting trenches. None of the standard tips and tricks did a single thing. Eventually, deep in the digital catacombs of Reddit, I found the culprit. Apparently, there is a known issue with the P1 dongle software version 5.19. It occasionally gets stuck, refuses to auto-update, and the only solution is to have the manufacturer manually "push" the update to your specific device from their end. So, I have dutifully submitted a support ticket and am currently residing in Zen waiting mode.
But it’s not all doom and gloom! Because while the battery is currently just a very expensive, heavy paperweight, the electricity market decided to throw us a bone. As I write this, the current power price is actually negative. Yes, you read that correctly: we are currently being paid to consume electricity. It’s hovering around -€0.003 per kWh.
Naturally, we immediately plugged in the electric car. We are getting paid a fraction of a cent by the grid to charge it, and to make this financial heist even sweeter, my employer reimburses charging costs at €0.25 per kWh. We are literally making a profit to fuel the car. Take that, Murphy!
But let me tell you, the current energy market is basically the Wild West right now. Talk about massive spikes and dumps. While we are literally giggling about getting paid to draw power this afternoon, the price is scheduled to violently rubber-band back up to a whopping €0.16 per kWh right at 18:00. It's an absolute rollercoaster of supply and demand that makes you slightly dizzy just looking at the daily charts.
This extreme volatility—swinging from negative pricing to premium rates in a matter of hours—is exactly the reason we invested in the home battery in the first place. The whole master plan is to soak up that practically free energy during the daytime dumps, and then stubbornly refuse to buy from the grid when the price aggressively spikes just in time for cooking dinner.
The P1 dongle, despite its firmware rebellion, is actually still doing some things right. It’s successfully pulling data from the smart meter and flawlessly fetching those chaotic dynamic grid prices. But the absolute coolest surprise? We instantly got detailed insights into our gas consumption, too! I had no idea the smart electricity meter was secretly holding hands with the gas meter in the basement. It’s a brilliant little ecosystem when it decides to play along.
While exploring the app's features, I noticed they offer an "Energy+" subscription for a grand total of €1 per month, and honestly, it looks incredibly worthwhile for our specific setup. The absolute biggest selling point for us is that it allows you to link your solar inverter directly into the app. Since we have an SMA inverter, this connection is going to be vital. It will unlock a proper "self-consumption" graph, letting us see exactly how much of our own solar power we are using directly in the house versus what gets pushed back to the grid. On top of that, the subscription offers multi-year data storage and the ability to export all those beautiful meter readings to Excel. Personally, I don't need a spreadsheet for my electricity, but my wife works in the energy sector. For her, having access to granular data to analyze (and let’s be honest, to spy on how it compares to other platforms) is basically the equivalent of a kid in a candy store. Throw in the app's ability to analyze standby power waste, and she is entirely sold on the idea.
Now, if we could just get customer support to hit that magical "push update" button, we might actually be able to test how this whole setup—battery, solar, and smart app—works together in harmony to conquer those price spikes. Fingers crossed!
Cheers,
Peter