Let’s be honest: there is no single “best home battery” that suits everyone. It depends on what you want.
But if you want to know quickly where to look in 2026: the Sigenergy SigenStor is the best all-rounder that grows with you. The Marstek Venus is the best budget choice and the plug-in entry point. The Tesla Powerwall 3 is the strongest for whole-home backup power. The BYD Battery-Box is the nicest if you want to expand in small steps later on. And the Enphase IQ Battery has the longest warranty at 15 years, especially if you already have Enphase inverters.
I’ll explain everything below. No sales talk, but plenty of the small print that most comparison sites skate right over.
Which home battery brands are there in 2026?
The market has got crowded. Roughly three groups.
1. The fixed, modular systems (hybrid, with inverter)
This is the big category: Sigenergy, Huawei, BYD, Tesla, Enphase, AlphaESS, Growatt, GivEnergy, SolarEdge. You mount these on the wall or put them in the shed, and an installer connects them.
2. The regional and brand-specific systems
Sessy (by Zonneplan), Victron (strong in off-grid), Zonneplan Nexus. Often with their own app and dynamic trading built in.
3. The plug-in batteries
Marstek, Anker Solix, EcoFlow, HomeWizard, AEG. You plug these into the socket yourself. No installer needed, lower capacity, lower price.
I wouldn’t write off the plug-ins as toys. For a small household or a flat without room for a large system, they’re perfectly fine. But don’t expect whole-home backup power from them.
How do you pick the right brand? The 7 things that really count
Before you sign a quote, run through these seven. In this order.
1. Capacity (kWh)
How much power you store. For an average household with solar panels, 5 to 10 kWh is enough. If you have a heat pump or charge a car at home, you’ll want to head towards 10 to 15 kWh or more.
2. Expandability
Can you add modules later? This matters more than people think. Buy tight, and in three years you might want to expand. Watch the step size: BYD goes in steps of 2.5 kWh, many others in steps of 5 kWh.
3. Inverter: hybrid or AC-coupled
A hybrid battery has the inverter built in (Sigenergy, Tesla, Huawei). More efficient and tidier, but you often replace your whole inverter. AC-coupled (Enphase, many plug-ins) sits alongside your existing setup. Handier if your solar panels are already up and running.
4. Backup power (backup/EPS)
Does your home stay on when the grid fails? This varies enormously by brand, and it’s almost never “just included”. More on that further down, because this is where things often go wrong.
5. Warranty and cycles
How long can you count on it? Look at three things: the number of years, the number of charge cycles, and the guaranteed remaining capacity (usually 70% after 10 years). All three, not just one.
6. Price per kWh
The fairest way to compare brands. In 2026 a complete, installed system usually sits between 600 and 900 euros per kWh. Anything well above that without a good reason: steer clear.
7. Availability and service in your region
A brand from a web shop without a local service point is a gamble. When there’s a fault five years down the line, you don’t want to be stuck with a foreign helpdesk in a language you don’t speak.
Round-trip efficiency: the figure nobody mentions
Quick word on this technical term, because it genuinely costs you money.
Round-trip efficiency is how much power you get back out of what you put in. Put 10 kWh into the battery and get 9 kWh back out, and the efficiency is 90%. That one kWh difference is lost to inefficiency.
The better brands (Sigenergy, Huawei) reach 97% or higher. Cheaper plug-ins sometimes sit around 85 to 90%. With daily charging and discharging, that adds up.
I’m not saying you should go on that figure alone. But if a salesperson won’t talk about it, I get a bit more sceptical straight away.
Comparing home battery brands: the 2026 table
Below are the main brands side by side. Prices are indicative guide prices for 2026, including installation and inverter where applicable, unless stated otherwise. Prices move, so use this to orient yourself, not to hold anyone to.
| Brand | Capacity / expandable | Inverter | Backup power | Warranty / cycles | Guide price per kWh | Suits |
|---|---|---|---|---|---|---|
| Sigenergy SigenStor | 5 to 54 kWh, per module | Hybrid, built in | Yes, optional gateway, switchover ~0 ms | 10 years / ≥6,000 cycles, >97% round-trip | ~600 to 800 euros | All-round, smart trading, EV plans |
| Tesla Powerwall 3 | 13.5 kWh, expandable to ~54 kWh | Hybrid, built in, 11.5 kW | Yes, whole home, strongest in class | 10 years / 70% remaining capacity | ~750 to 900 euros | Whole-home backup, high power |
| Huawei LUNA2000 | 5 to 30 kWh, per ~5 kWh | Only with Huawei SUN2000 | Yes, backup box optional | 10 years / ~6,000 cycles, 97% | ~600 to 750 euros | New complete Huawei installation |
| BYD Battery-Box HVS/HVM | 5 to ~22 kWh, per 2.5 to 2.8 kWh | Works with many brands (Fronius, SMA, GoodWe) | Yes, with the right inverter | 10 years / ~6,000 cycles | ~600 to 800 euros | Existing inverter, small expansions |
| Enphase IQ Battery 5P | 5 kWh per unit, stackable | AC-coupled | Yes, with extra hardware | 15 years / 4,000 cycles | ~1,000 to 1,400 euros | Existing Enphase, longest warranty |
| AlphaESS | 5 to 30+ kWh, per module | Hybrid options | Yes, model-dependent | 10 years | ~550 to 750 euros | Sharp value for money, all-round |
| Growatt | 2.5 to ~30 kWh, modular | Hybrid options | Yes, model-dependent | 10 years | ~500 to 700 euros | Budget, wide availability |
| GivEnergy | 2.6 to ~30 kWh | Hybrid | Yes, with gateway | 12 years | ~600 to 800 euros | Longer warranty, flexible |
| Victron | Custom, modular | Separate components | Yes, strong in off-grid | Component-dependent | Highly variable | Off-grid, tinkerers, boat/camper |
| Sessy (Zonneplan) | 5 kWh per unit, stackable | AC-coupled | Limited | ~10 years | ~800 to 1,000 euros | Convenience, dynamic trading |
| Marstek Venus | ~5.12 kWh, plug-in | Built in, plug-in | Yes, backup socket up to 2500W | 10 years | ~250 to 350 euros | Budget, renters, self-install |
Where brands really differ: backup power
This is the point most comparison sites skate over, and where people end up disappointed after the fact.
“Backup power” doesn’t mean the same thing everywhere.
Full backup power (whole home)
With the Tesla Powerwall 3 and Sigenergy (with gateway), your whole home stays on when the grid fails. It often switches over within milliseconds, so you barely notice. This does cost extra hardware (a gateway or backup box) that you pay for separately.
Limited backup power (one circuit or socket)
Many systems only supply power to one separate circuit or a single backup socket. The Marstek Venus, for example, has a backup output that delivers up to 2500 watts. Enough for your fridge and some lighting, not for your whole home.
No backup power
Some batteries simply shut down completely during a power cut, for safety reasons (anti-islanding). Without extra hardware you’re still left in the dark.
My down-to-earth view: if backup power matters to you, ask about it explicitly in the quote and have it written down exactly what stays on. “Backup-ready” is not the same as “delivers backup power”. That difference quickly costs 1,000 to 2,000 euros of extra hardware.
The small print in the warranty
Ten years’ warranty sounds nice. But read on.
Cycle limit. The warranty ends at the number of years or the number of cycles, whichever comes first. If you trade dynamically (charging and discharging several times a day), you’ll hit those cycles faster. A battery with 6,000 cycles and one with 4,000 cycles is a meaningful difference if you’re trading actively.
Remaining capacity. They usually guarantee 70% capacity after 10 years. So your 10 kWh battery is officially allowed to drop to 7 kWh without you being able to claim anything. That’s normal, but know it.
Who handles the warranty. This is the most important one. Is the manufacturer based in your country or in Europe with a service point? Or do you have to ship the box back to an address abroad yourself when there’s a fault? With the big brands (Tesla, Huawei, BYD, Enphase, Sigenergy) this is usually sorted through installers. With unknown web-shop brands: find out before you buy.
Registration. Many warranties only apply if you register the system online and keep the app connected to the internet. If you don’t, you can lose your claim. Sounds odd, but it’s written in there.
Which brand suits which profile?
Short and concrete. Find yourself here.
You want the best all-rounder that grows with you → Sigenergy SigenStor.
Modular from 5 to 54 kWh, hybrid inverter built in, smart energy management, ready for an electric car. Sharply priced for what you get.
You want whole-home backup power → Tesla Powerwall 3.
Highest power (11.5 kW), reliable backup, strong brand with good service. Pricey, but you get what you pay for.
You already have Huawei inverters or are building a complete Huawei system → Huawei LUNA2000.
Only works with Huawei inverters, so only makes sense within that ecosystem. But then it’s top-notch.
You have an existing inverter and want to expand in small steps → BYD Battery-Box.
Small modules of 2.5 to 2.8 kWh, works with many inverter brands. Ideal if you want to grow step by step later.
You want the longest warranty or have Enphase → Enphase IQ Battery.
15-year warranty, AC-coupled, sits alongside your existing setup. But more expensive per kWh.
You want the sharpest value for money → AlphaESS or Growatt.
Solid all-rounders, widely available, lower price per kWh. Less of a “premium feel”, but sound engineering.
You rent, have little space or want to start small → Marstek Venus.
Plug-in, self-install, around 1,200 euros for a good 5 kWh. No whole-home backup, but it does have a backup socket.
You’re a tinkerer or want off-grid → Victron.
Endlessly configurable, strong for boat, camper and genuine off-grid. Not plug-and-play.
You want convenience and dynamic trading → Sessy or Zonneplan.
Nice app, trading built in, little hassle. You do pay a bit extra for it.
What does a home battery cost in 2026?
Reckon on 600 to 900 euros per kWh
for a complete, installed system with inverter. That’s the honest range.
A few examples to make it concrete:
- A complete 10 kWh system: roughly 7,000 to 9,000 euros.
- Sigenergy SigenStor: starts around 6,000 euros for 5 to 8 kWh and scales up.
- Tesla Powerwall 3 (13.5 kWh): guide price 13,000 to 15,000 euros, on the expensive side but high power and whole-home backup.
- Marstek Venus plug-in (5.12 kWh): around 1,200 euros, self-install.
Note: backup-power hardware, extra work on the consumer unit and longer cable runs are often not included here. Always ask for an itemised quote, not one lump sum.
Whether a home battery pays for itself depends heavily on your electricity tariff, the feed-in arrangements and whether you trade dynamically. I won’t promise you a fixed payback time, because honestly one doesn’t exist. Anyone who does is selling you something.
Frequently asked questions
What is the best home battery of 2026?
There isn’t a single best. For all-round use the Sigenergy SigenStor is strong, for whole-home backup the Tesla Powerwall 3, for budget the Marstek Venus or AlphaESS, for expanding the BYD Battery-Box and for the longest warranty the Enphase IQ Battery.
How many kWh do I need?
For an average household with solar panels, 5 to 10 kWh is enough. With a heat pump or home charging you’ll want to head towards 10 to 15 kWh. Better to buy something tight and expandable than immediately too big.
Will my home battery work during a power cut?
Only if it has backup power (EPS) and the right hardware. Many batteries shut down during a fault for safety reasons. Ask explicitly what stays on and whether it’s your whole home or a single socket.
How long does a home battery last?
A good battery lasts 10 to 15 years. Don’t just look at the warranty years but also at the cycles (4,000 to 6,000+) and the remaining capacity after 10 years (usually 70%).
Can I install a plug-in battery myself?
Yes. Models like the Marstek Venus you plug into the socket yourself, with a compatible meter alongside. But lower capacity and usually only a backup socket, no whole-home backup.
Which brand has the best service?
The big names (Tesla, Huawei, BYD, Enphase, Sigenergy, AlphaESS) have a network of installers and European support. With unknown web-shop brands: check before you buy whether there’s a local service point.
There you go. Now you know where to look and which questions to ask in the quote.
Want to know first whether a home battery actually pays off for your usage and tariff, and how you can save even more on energy? Then have a look at the Energy Crusher: https://energie-verpulveraar.fredsbouwtekeningen.nl/. There I’ll work it through with you, in plain language, no sales talk.
Cheers, Fred Schouten
PS: Always ask for an itemised quote, not one lump sum. Put “whole-home backup” or “backup socket” in there word for word, plus the number of cycles in the warranty. Those two lines will save you the most disappointment later on.