Tesla Powerwall (1 unit)
Standard One Powerwall ~13.5 kWh
The reference configuration for a family home: you store the day's production for the evening, with a large capacity in a single unit.
13.5 kWhhomeall-in-one
All about storage → Tesla Powerwall logo
Partner brand · Storage Tesla Powerwall : the all-in-one 13.5 kWh pack with built-in backup
Tesla Powerwall is an all-in-one home battery of 13.5 kWh, with built-in grid backup and control via the Tesla app. wendows is an installer: advice, installation and after-sales by our own teams, with subsidies and reduced VAT handled when the home is eligible.
13.5 kWh usable capacity
Built-in backup native grid backup
Certified installer install & service by wendows
Photo — wall-mounted Tesla Powerwall (exterior wall)
Tesla appreal-time control
Native backupbacked-up circuits
Ranges & uses
The Powerwall configurations we install
The Powerwall is a fixed-capacity pack of 13.5 kWh, which you size by the number of units according to your needs. Here are the uses we cover most often in Belgium.
Powerwall + panels
Solar Paired with panels
Combined with your panels, the Powerwall maximises self-consumption: you use your own energy in the evening rather than buying it back from the grid.
self-consumptionstored surplusTesla app
Solar battery → Two Powerwalls
Large Two Powerwalls and up
For heavy consumers (heat pump, electric car), we install several units to aim for broad autonomy, depending on your profile.
27 kWh+multi-unitlarge households
Lithium storage → Powerwall in backup mode
Backup Built-in grid backup
The Powerwall switches over to the essential circuits during an outage, without a separate backup inverter. The scope of the backed-up circuits is defined at sizing.
native backupauto switchoverchosen circuits
Backup & outages → Technical strengths
What sets a Tesla Powerwall apart
Beyond capacity, it's the built-in backup and the control via the app that make the difference. The brand-specific benchmarks, installed by our teams.
Chemistry Lithium-ion
The Powerwall relies on a proven lithium-ion NMC chemistry, optimised for high energy density in a compact wall-mounted format.
Capacity 13.5kWh
Fixed usable capacity per unit. For greater autonomy, you install several Powerwalls. The exact need is set according to your consumption and your production.
Warranty up to 10years
Manufacturer warranty on the cycles and capacity retention, according to Tesla's terms. wendows acts as your relay for any intervention.
Power high
The Powerwall delivers a comfortable discharge power, suited to a home's peaks. The exact values depend on the model and are confirmed at sizing.
Backup Built-in
Grid backup is native: no need for a separate backup inverter. In an outage, switchover to the essential circuits is automatic, depending on configuration.
Control Tesla app
Track production, charge and consumption in real time from the Tesla app, with configurable optimisation modes.
* Valeurs indicatives selon la gamme et la configuration. Les performances et garanties exactes dépendent du modèle, du vitrage et des dimensions — confirmées lors du métré.
Certified Tesla installer
Tesla manufactures, wendows installs — and stays your single point of contact
Buying a good battery isn't enough: the quality of the backup and the sizing comes down to the installation. Our installers fit it to the manufacturer's rules, and we handle the warranty and after-sales directly.
Certified installer Trained on the Powerwall and its commissioning, including the backup configuration. No cascading subcontracting: our own teams are on site.
On-site sizing We define the number of units and the circuits to back up according to your real consumption, instead of an imposed solution. A clear quote, no surprises.
Belgian after-sales, followed over time Remote updates, monitoring via the app and tracked interventions. The Powerwall evolves through software over time.
Subsidies & 6% VAT handled We prepare the subsidy files and apply the reduced VAT when the home is eligible. One contract, one person in charge.
"Certified Installer" logo
All-in-one storage partner Tesla Powerwall installer · Belgium
Compare the brands
Powerwall, or another battery brand?
Tesla isn't our only string. Depending on your backup needs and your budget, other brands may suit you better. Compare them, then we decide together at sizing.
↑ all the brands
Battery brands hub
An overview of the storage brands we install in Belgium: all-in-one, LiFePO4 and modular, by capacity and by budget.
See all battery brands → vs TeslaBYD Battery-Box
Stackable modular LiFePO4 battery, with adjustable capacity. The go-to if you want to start small and expand over time.
Compare with BYD → vs TeslaHuawei LUNA
Modular battery paired with Huawei inverters. Worth considering if your installation is already in the Huawei ecosystem.
Compare with Huawei LUNA → the needBackup & outages
The Powerwall's strong point is its native grid backup. Understand what a backup brings and how to size it.
All about grid backup → to combinePairing with panels
A battery only makes sense with good production. Check the sizing of your panels before adding storage.
See solar panels → the guideThe home battery in detail
Before the brand, the principle: understand how a battery stores your solar surplus and cuts your bill.
All about home storage →Why choose Tesla Powerwall for your storage?
When you add a battery to your panels, you're choosing two things: a storage brand and an installer. Tesla answers the first with the Powerwall, an all-in-one pack of 13.5 kWh: you store the day's surplus to consume it in the evening, and the grid backup is built in, with no additional hardware.
The brand stands out for the user experience: real-time control from the Tesla app, configurable optimisation modes and remote software updates. To aim for greater autonomy, you install several units, depending on your consumption profile.
"The Powerwall's real strength is the built-in backup: when the grid goes down, the essential circuits stay powered with no additional hardware.
That's where our role as an installer matters. We size the number of units and the circuits to back up according to your real consumption, fit it to the manufacturer's requirements and remain your single point of contact for the warranty, the commissioning and the after-sales. No buck-passing between the seller, the manufacturer and the fitter.
1
One contract, one person in charge. Advice, sizing, ordering the Powerwall, installation, subsidies and after-sales: everything goes through wendows, from the first call until after the warranty.
On the budget side, the Powerwall is priced mainly according to the number of units and the backup configuration. To get a sense of your project, start from our storage pricing page, then ask for a costed quote: it's the only way to get a fair price, sized to your installation.
Indicative price 2026
How much does an installed Tesla Powerwall cost?
The price depends mainly on the number of units, the backup configuration and your existing installation — not just the brand. Here are starting ranges for a Powerwall installed by our teams, with subsidies deductible afterwards.
See the detailed storage price grid →* Indicative ranges for an installed Tesla Powerwall, excluding specific configurations. Precise, costed estimate with your free quote.
Powerwall ~13.5 kWh
from €9,500
all-in-one pack, installed Grid backup
included
backup built into the pack Two units ~27 kWh
on quote
for large households VAT / subsidy
6% or subsidy
depending on region and eligibility FAQ Tesla Powerwall
Your questions about the Tesla Powerwall
Is the Tesla Powerwall a good battery?
It's an all-in-one pack of 13.5 kWh recognised for its built-in backup and its control via the app. The appeal: a complete solution and native grid backup. As with any storage, the result depends on the sizing and the backup configuration — hence the importance of an installer.
What is the capacity of a Powerwall?
Each Powerwall offers 13.5 kWh of usable capacity. For greater autonomy, you install several units. The number of units is set at sizing, according to your consumption and your solar production.
Does the Powerwall work during an outage?
Yes, that's its strong point: the grid backup is built in. In an outage, the Powerwall automatically switches over to the essential circuits you've chosen, without a separate backup inverter. The scope of the circuits is defined at sizing.
Can you install several Powerwalls?
Yes. For heavy consumers — heat pump, electric car — we install several units to aim for greater autonomy. The number depends on your consumption profile, defined during the study.
What warranty comes with a Tesla Powerwall?
According to Tesla's terms, the manufacturer warranty can run up to 10 years and covers the cycles and capacity retention. wendows acts as your relay and handles the intervention. The exact terms are specified on your quote.
How much does an installed Tesla Powerwall cost?
Reckon from around €9,500 for an installed 13.5 kWh Powerwall, backup included, depending on your installation. Several units are priced on quote. Subsidies and reduced VAT deducted afterwards, depending on your region and your eligibility.
Get your free battery Tesla Powerwall quote within 48h
Free on-site survey, recommended range, grants calculated, a single point of contact. Describe your project in under a minute.
Approved Tesla Powerwall installer Grants & 6% VAT handled for you Installation & after-sales by our teams