https://m.nieuwsblad.be/cnt/dmf20220713_97372097
Can’t read the article, but thoughts / experiences on getting a home battery installed?
I’m in the process of gathering ‘offertes’ & ROI calculations. There are many variables complicating an accurate calculation though.
22 comments
I asked my electrician couple months ago. It’s only useful in a couple situations (when you can use your produced energy at night while producing energy through solar panels in the day). To actually know how big your battery should be, you should measure your energy use for a couple months -> ideally for a year because your energy use will change through the seasons.
My electrician said it’s better to wait for better batteries and smart appliance that are easier to use in our case.
All in all its a case by case solution that depends on your own energy use and how willing how far you’ll go for it
Got a smart meter and solar panels.
Did the calculations last year with some offers I got.
The earliest possible for me to earn my money back was 13 years, warranty on the battery’s was 10.
Hard to know how much performance is lost over those years. So in reality the ROI point will be later. Also heard several talks that insurance companies might increase costs in the future for battery owners.
In my specific case ROI is later then warranty term so not worth it imo
Dunno, hangt er vanaf wat uw capaciteit is, ik had tijdens het opstellen van onze offerte een exponentionele sprong gezien om van een 5kwh batterij te gaan naar een hogere capaciteit, dat werd rap heel duur. Edit: Ik zie hier inderdaad comments van mensen die de berekening gemaakt hebben (al dan niet met de huidige prijzen) en dan concluderen dat het niet voor hun was, fair enough, maar de sprong van 5 kwh naar 10 kwh is letterlijk x2 en dan zou het voor mij ook wel te prijzig zijn om er aan te beginnen.
Ik betaal 2800 (met de premie eraf) euro voor een batterij van 5kwh.
5 kwh is voor ons kleine gezin perfect genoeg om een avond/nacht en ochtend te overbruggen volgens de berekeningen (als ik niet te zot ga doen met bv draagbare elektrische verwarmingstoestellen enzo )
Aangezien wij een digitale meter gaan krijgen en ons verbruik piekt in de avonduren/nachturen wanneer onze panelen niks gaan opbrengen, lijkt het mij onzinnig om tijdens de dag alles te dumpen op het net en dan s’avonds duurder terug te kopen. Zeker met de prijzen van stroom die de pan uit swingen.
Maar het is zeker even onzinnig om een batterij van 10 kwh of meer te zetten (dubbel zo duur) als je dit in de verste verte niet op krijgt zodra de panelen niets meer opwekken ‘s avonds.
De VREG raadt aan om in te zetten in zelfverbruik wat door een batterij een pak gemakkelijker wordt.
rich hippies who don’t understand why we need an electricity grid at all keep promoting this so it’s probably not a sound investment
e: prove me wrong and get the battery with a 40 year ROI, what’s the worst that could happen reddit
It’s not. Correct prices for delivered capacity are a joke, and it loses about 10% of that capacity each year. Even with the subsidies it’s way too expensive.
I straight up asked all the companies when looking for solar panels. Most of them were honest enough to advice against it for now.
There are people using their electric cars as home batteries (cars that allow that). As far ad I know, that’s a more solid investment. One device that can do both instead of two
It doesnt make sense without subsidy.
The break even is +-= the lifetime of the battery so at best you’re looking to break even and that’s not an interesting proposition.
its simple to find out in a way. the battery has a x cycle usage. so AT MOST, you will be able to pull all these out. so lets say you got a 2kWh battery with 10k charges, that’s 20.000 kWh you could possible get out of it. that’s 27 years, every day, full up, full off, on a 10 warranty product, LOL, right?
anyway. so you have this 20.000kWh at best, lets say you pay 45 cents per kWh, cuz life is expensive atm. this gives you the best cap at 9.000€ for a battery that costs you perhaps 3-4k@ after the state funds you a bit. this would be insane as in the winter it will probably never charge full.
so cut this in half, and look, you still have it positive. and the new capacity tarriffs isn’t out yet!
Best to go about this is knowing your electric usage on a 5min base. how much do you use in a day? how much in the evenings? can you regularly use the entire battery, daily?
Ja, maar de industrie is in volle ontwikkeling. Ik zal nog enkele jaren wachten en de som opnieuw maken. Onze stroom zal niet goedkoper worden in de eerste vijf jaar.
Ik heb een batterij en ben hier toch tevreden mee. Overdag is deze opgeladen en gebruik ik ook mijn groot gebruikers. (vaatwasser, wasmachine, airco’s,..) Snachts is mijn batterij dan voor mijn nachtverbruik. Heb tijdens de zomer een zelfverbruik van 50 procent, maar dit komt doordat de installatie voor de zomer te groot is. In de herfst en lente gaat dit richting de 80-90 procent. In de winter is dit 100 procent, maar ook afname van het net.
Nieuw vast contract in oktober 2021. Voorschot van 100 euro en 20 euro terug gehad.
If you take one, you should take a battery as small as possible. The ROI will get lower on bigger batteries.
The best scenario is a battery that will bridge your night consumption. Everything over that will only get used some days and not be as interesting.
The cost is the second transformer on top of the one you already have for your solar panels. If it was just the battery or you are bringing the battery at the same time as the solar panels, it could be profitable.
well the idea is that they will be highly profitable if they ever start doing capacity tariff pricing instead of todays pricing.
But even today, it often pays itself back if you use a lot of electricity and actually regularly use up more than 50% of the capacity. Also, if you have a flexible plan, typically in winter electricity will be more expensive, then a battery will be more profitable of course. And especially if you have a heatpump
I did my calculations one year ago, and came to the conclusion you never gonna get that investment back, before your battery degrades heavily.
So yeah, i’m very pleased i’m now correct.
I don’t even know if a ‘warmtepomp’ is even a good investment in a BEN house with an e-peil <20.
Friend of mine has a BEN house with gas, even at these prices he’s only paying 60€/month to heat his big house.
We got solar panels (offerte was 1.5y ago) and at the time the seller discouraged us from getting a battery because when calculating the return of investment based on the costs, it was too close towards the guarantee period. So he felt at the time you were more likely to get just over break even after your initial investment. So the high upfront cost wasn’t really justified (especially because we didn’t get a subsidy)
So everyone expects here a ROI instead of energy independence and self sustainability?
Got it.
If you buy solar together with the batteries it *can* be id you include the subsidies. Do your calculations before comitting, I’d say.
I have installed a battery thee weeks ago an already retreived 205kwh which is 60 euro. Ok these are the best months but in a curve over the year I estimate to have +-600 euro’s return. Cost was 8000 euro’s for 15kwh + 8.8 converter (more expensive as I had to replace the converter, as the old one was 8 years it was almost at the end anyway).
I calculated to need 12 years ROI but this is at the current prices.
2 important things to take into account, our current inflation and the increase of the prices. If you factor these it will be less then 10 years and that makes it good enough for me. Keeping the money on the bank will let it loose a lot of value each year so its the right money to invest in longer term ROI projects.
Asked the salesman of my solar powers and he advice against it, too expensive now, not durable yet. He advices to just keep the “terugdraaiende teller” as long as possible and wat for EV’s to get more common.
His vision was that car batteries from EV can just be taken out rather soon and they will operate as remote batteries for more than your car. You’ll also be able to charge that battery at work as an extralegal benefit in the near future because loading poles everywhere is not realistic.
In short: wait to buy a battery, one way or another they will drop in price.
Dit verschilt met teveel factoren om er met zekerheid een uitspraak over te doen. In mijn geval kwam de berekende terugverdientijd tussen net onder en net boven de gegarandeerde levensduur van de batterij. Uitgerekend met de prijzen van een jaar geleden.Met het evolueren van de energieprijzen kan het zijn dat de terugleververgoeding ook stijgt. Dus kan het zijn dat het net iets interessanter wordt je stroom terug te verkopen dan wel zelf te verbruiken. Of net niet. Dat beïnvloedt de afschrijving van de aankoop van een batterij sterk. Het is onmogelijk om vandaag al een concrete uitspraak te doen over de electriciteitsprijzen die binnen 5 of 10 jaar zullen gelden. Maar ik veronderstel wel dat die tegen dan serieus gestegen gaan zijn. Net zoals ik veronderstel dat mijn aankoop van aandelen x of y interessant zijn op die termijn. Weten zit er, helaas, niet in.
Still too expensive even with the higher energy prices
30x360WP Longi Full Black
GoodWe ET 10kVA
11kWh BYD HVM
Oost/West opstelling 30°
Cost: €15.800 incl. VAT (ordered in september 2021, placed in beginning of 2022, costs a lot more now – like nearly €6k more), but you can still expect 5-6 years break-even on the full installation with current energy prices)
Subsidy: €3.250 in 2022
Total system cost : €12.550
Yearly savings:
– €1750 direct energy use
– €1500 injection compensation (installation is way larger than it should be, but I’m planning EV & Heat Pump in the coming years)
– Estimated savings on capaciteitstarief: €250 per year (discharge capacity battery system 5.1kW at €50 per kW)
Total: €3500 savings per year
Break-even time: 3.58 years. Lol. And I FULLY expect prices of electricity to rise even further. AND I didn’t even throw my EV in the mix, which will net me a lot more than the 20 cents I currently get for my injection. (can bill my BVBA at €0,46 per kWh per the CREG, combine this with smart charging & home-office 2.5 days of the week + weekends, and my estimated break-even time drops to 2.78 years)
Could I have gotten an even higher ROI on just solar panels? Yes. But then again, money in the bank is worth shit in these conditions. My house is now protected against future energy price rises AND I have a back-up function in case the grid fails. My battery is way too big for current consumption, but the CONVENIENCE is amazing. Doing dishes/washing/cooking all after the sun goes down.
Don’t know how y’all are calculating your returns but dang … Best investment ever. Back-up function is a nice plus. I suggest you look at your investment as a WHOLE (solar PLUS battery) instead of calculating the difference between solar/battery. I want my home to be RESILIENT in these challenging times, and whoever wrote this article is as dumb as a pile of bricks imo.
Here’s a couple of trends to take into account:
* The demand for batteries is increasing exponentially due to EV’s (what happens to a commodity when the demand is higher than the production?)
* Materials are getting more expensive by the day
* Inflation is eating away the value of your money at a rate of 9% per year
* The EU is losing value against the US dollar & Chinese Remnibi (from where we import most panels, inverters & batteries)
* Subsidies are lowered year after year
* Energy is going to be a MAJOR challenge in the coming decades
Friend of mine has the same system running (BYD HVM) for a whole year now (300 cycles on the battery) and it lost a whopping 1% capacity. Yes, you read that right, 1%. This BYD system is expected to last 9000-14000 cycles depending on the ambient temperature it operates in. At 300 cycles per year, that’s 30 – 46 years BEFORE IT DROPS BELOW 60%. So it’s not even broken, it will still be a functioning battery of 6.6kWh. And I’m earning my money back in 3.58 years.
The best time to invest in batteries was last year. The second best time is THIS year. (well, actually, next year because everyone is sold out for this year). You won’t see these prices again for several years. Mark my words.
BTW: LFP batteries are super stable & firesafe. Just don’t put an NMC battery in your basement, lol.
[https://www.youtube.com/watch?v=Bg_480HUheo](https://www.youtube.com/watch?v=Bg_480HUheo)
Next up I’m adding 2 smart module for smart EV charging, peak shaving, smart Heat Pump functioning & becoming part of a VPP (virtual power plant) to earn some additional money on charging/discharging my battery depending on the dynamic prices based on BELPEX. My home is going to be a test project to see if these 2 modules can work together & create added value. Yes, this will degrade my battery faster, but as stated above, it should last 30 – 46 years and I fully expect the electronics to fail way before that, so why not maximize my returns over the next ~20 years.
[www.scoptvision.com](https://www.scoptvision.com)
[www.lifepowr.io](https://www.lifepowr.io)
THE FUTURE IS NOW, OLD MAN! <insert meme>
P.S. anyone selling extra BYD HVM modules second-hand, I’m definitely scooping them up.