KOSTENOPBOUW
Waarom kost een thuisbatterij wat hij kost?
Goedkoper kan altijd. Maar naast de batterij zelf betaalt u ook voor vakmanschap, voorbereiding, bereikbaarheid en een bedrijf dat er over tien jaar nog is. Zie hieronder precies waar uw geld naartoe gaat.
Waar uw geld naartoe gaat
Techniek en materialen: 58%
Montage en inbedrijfstelling: 9%
Service en garantie: 10%
Advies, voorbereiding en organisatie: 17%
Continuïteit van het bedrijf: 6%
What are you actually paying for?
We use an example price of € 10.000 including VAT for a complete home battery installation. Excluding VAT, that is € 8.264. We divide that amount over everything needed to install a battery properly and keep it working well for years. Switch parts off and see how a "cheaper" quote comes about.
- 7Business result and continuity6%€ 496
A healthy company needs financial room to invest, absorb setbacks and continue its services in the future. Business result is not guaranteed net profit.
- 6Service and warranty reserve10%€ 826
An installation has to work reliably for years. That is why there must also be room after handover for support, faults and warranty work. Warranties often run for five or ten years; this is an internal reserve, separate from your statutory warranty rights.
- 5Business operations and organisation5%€ 413
Staff, office, storage, company vans, insurance, tools, software, certifications and training make professional service possible.
- 4Preparation, planning and logistics6%€ 496
Technical preparation, checks, planning, purchasing and transport make sure the installation runs in an organised way.
- 3Marketing, advice and sales6%€ 496
Being findable, customer advice, quotes and personal guidance cost time and money. That is how customers can find us and make well-informed choices.
- 2Installation and commissioning9%€ 744
Professional installation, connection, testing and the safe handover of your system.
- 1Technology and materials58%€ 4.793
The battery, inverter, cabling and protection devices form the technical basis of your installation.
Indicative cost breakdown of a complete installation, not an official industry average. The actual breakdown differs per situation. Business result is not guaranteed net profit. The service and warranty reserve is separate from your statutory warranty rights.
Why is someone else cheaper?
What is usually missing
A lower price almost never comes from the battery itself being cheaper: the technology costs every installer roughly the same. The difference lies in what is arranged around the battery. No site survey beforehand, no reserve for faults and warranty, no buffer for setbacks. You do not see that on the quote, but you do the moment something goes wrong.
A home battery lasts 10 to 15 years. So the question is not only what it costs today, but also who will still be around in five years to maintain it.
The one-person business with a van
A self-employed installer can work more cheaply thanks to lower fixed costs. Many self-employed professionals do excellent work. But when one person runs the entire business, availability and reserves are limited too.
- What happens in case of illness, holidays or a full schedule?
- Is money set aside for warranty work in five years?
- Who answers the phone when the battery stops working in winter?
- Will the company still exist when you need the warranty?
What happens when an installer disappears
In 2022 the Dutch solar market grew explosively: the number of installers almost doubled. Then demand collapsed. To keep working, many installers started a price war. They won jobs at prices that left no room for service, warranty or a buffer. The owner of BonGo Solar, then one of the largest installers in the Netherlands, also pointed at competitors selling below a healthy price when it went bankrupt.
Cheap was the only selling point
Those who chose the lowest price in those years often got a tidy installation. But when price is the only selling point, nothing is set aside for later. If the installer goes bankrupt, you can forget about your warranty: nobody else voluntarily takes over that obligation.
Installers that went bankrupt, and what it meant for their customers
- March 2022Duurzaamheidscentrum Nederland
Dozens of customers paid thousands of euros for solar panels that were never installed. According to a lawyer, they will get little back: wages and tax debts come first.
Source: Omroep Brabant, 3 mrt 2022 - May 2024BonGo Solar, Novavolt & Koolen
One of the largest installers in the Netherlands. A large number of customers with open orders and deposits had to register with the receiver. Because BonGo and Novavolt were members of the SGZE guarantee fund, deposits were covered up to a maximum of 30% or € 3,000.
Source: Solar & Storage Magazine, 27 mei 2024 - July 2024GroenOpgewekt 5.0
An exception with a good outcome: another installer bought the customer base and took over the remaining warranties. Usually that does not happen.
Source: Solar & Storage Magazine, 31 okt 2024 - 2025123Groep (Zonne-Expert, Batterij-Expert), Van Daalen Zonne-Energie, Solar Fusion, Energie Studio, De Jonge Techniek, Compleet Duurzaam, Zonmaat, NBI, Solarstars
A selection of installers that went bankrupt in 2025. At Solar Fusion there was no takeover and no guarantee fund: customers have to find and pay a new installer themselves for every fault.
Source: Overzicht failliete installateurs, Hommersen Energy Solutions - November 2025Soly
Installer of solar panels and home batteries in seven countries, backed by tens of millions in investment. Even a large, well-funded company turned out not to survive automatically.
Source: Solar & Storage Magazine, 27 nov 2025 - 2026Hi Tronic (Batteroo)
Seller of home batteries. Courts had already ordered the company to repay deposits. After the bankruptcy, customers may have lost their deposit.
Source: Solar & Storage Magazine nr. 3, 2026
What a bankruptcy means if you are already a customer
- The installation warranty lapses. Nobody repairs an error in the connection or meter cupboard free of charge any more.
- Deposits paid are often lost. As a consumer you are at the back of the queue with the receiver: wages, the tax authority and the bank come first.
- The manufacturer's warranty usually remains, but you need a new installer for diagnosis and replacement. They simply charge the full rate.
- Monitoring, updates and fault service stop. The battery that seemed cheapest becomes the most expensive at the first fault.
- Techniek Nederland also warns of fraudsters posing as the buyer of a bankrupt installer and demanding immediate payment.
And the SGZE guarantee fund?
The Stichting Garantiefonds Zon & Energie (SGZE) is the oldest guarantee fund in the industry. In case of bankruptcy, it covers your deposit up to a maximum of 30% of the purchase price or € 3,000, and it handles manufacturer warranties. But far from all installers are members, the fund does not refund a fully lost purchase price, and it does not repair errors in the installation itself. So always ask whether and how your installer is a member.
Source: Solar & Storage Magazine, 27 mei 2024A fair price is not a luxury. It is a precondition.
Why we do not want to be the cheapest
Installing a battery is one thing. Being there for it for years takes more. That is why our price includes service, warranty and sound business operations. Not to earn more, but to still be here in five and ten years.
StroomNed is part of ABAN Group, works with its own certified technicians and sets money aside for service and warranty. So you are never left empty-handed.
Ask every installer this
- Who helps me if there is a fault in three years?
- How is the warranty arranged if the installer stops?
- Do you carry out a technical survey of my meter cupboard beforehand?
- Do you work with your own certified technicians?
- Is your company accredited, insured and registered with the Chamber of Commerce (KVK)?
- How much deposit do you ask, and is it protected?
What does a home battery cost for you?
We will prepare a personalised proposal detailing all costs, projected savings, and the underlying assumptions on which these are based.