CHARGED (van de Sessy thuisbatterij)

What CHARGED (van de Sessy thuisbatterij) does

Charged B.V., operating commercially under the brand Sessy, is a Dutch manufacturer of residential lithium iron phosphate (LFP) home battery systems designed to store excess solar energy for household self-consumption. Founded in 2018 by Twan Vooijs and Roeland Nagel and headquartered in Andelst, Gelderland, the company designs, assembles, and supports its products domestically, with all development, manufacturing, and customer service based in the Netherlands. The product line consists of three capacity tiers — Sessy 5 kWh (€3,550), Sessy 10 kWh (€5,500), and the pre-sale Sessy Plus 15 kWh — each integrating a built-in AC inverter, Battery Management System, and a proprietary P1 smart meter reader that interfaces with Dutch DSMR 2-5 smart meters to enable real-time optimization across multiple operating modes (Zero-on-meter, Eco-mode, GridEase, trading mode).

The core software stack automatically schedules charging and discharging based on solar generation forecasts, dynamic energy tariffs, and household consumption patterns, and is exposed via an open API for integration with platforms such as Home Assistant, Homey, and Domoticz. Revenue is generated primarily through one-time hardware sales via a direct-to-consumer e-commerce channel (sessy.nl), supplemented by a nationwide network of certified installation partners, wholesale distribution agreements with 4blue and SolarNRG, and co-marketing partnerships with energy suppliers Eneco and Frank Energie. The company serves Dutch homeowners with solar panels as its primary customer segment, with secondary segments including heat pump households, EV owners, energy cooperatives, and housing corporations.

The company operates a hybrid go-to-market motion combining self-service online ordering, free advisory consultations, partner-led installation, and B2B partnerships with utilities and housing developers. Sessy does not charge recurring software subscription fees, distinguishing its pricing model from several competitors. As of early 2024, the company has raised €2 million in growth capital from SmartHub Incubator Industry, holds ISO 9001:2015 certification renewed in July 2025, and self-describes as the best-selling home battery in the Netherlands with an 8.9/10 customer satisfaction rating.

Name

CHARGED (van de Sessy thuisbatterij)

Legal name

Charged B.V.

Website

https://sessy.nl

Company type

Private

Founded year

2018

Operating status

Operating

Headcount range

11–50 employees

Short description

Sessy (Charged B.V.) is a Netherlands-based manufacturer of LiFePO4 home battery systems for Dutch residential solar owners, selling 5–15 kWh units via direct-to-consumer e-commerce, certified installers, and energy-utility partnerships, with proprietary smart energy management software and no subscription fees.

Ownership category

akta.pro rank

NAICS

Battery Manufacturing (33591)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600)

akta.pro primary industry

Home Energy & EV Charging (HEMS, Smart Meters, Batteries, Chargers) (HSAPAQAF)

akta.pro secondary industries

Power Conversion Systems (PCS), Inverters & Transformers for BESS (EUAFAAAE), Managed EV Charging Software (Residential, Fleet, Workplace) (EUAFAMAA)

Keywords

• Home battery storage
• Residential energy storage
• LiFePO4 battery systems
• Solar energy storage
• Smart energy management

Headquarters

HQ city

Andelst

HQ country

Netherlands

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Technology or R&D, Marketing or Sales, Operations

Revenue model

1. Home Battery Hardware Sales: One-time hardware sales of Sessy home batteries (5 kWh, 10 kWh, and 15 kWh Plus models). Revenue generated from product sales directly to consumers and through installer partners. No subscription fees for smart software control.
2. Installation Services: Professional installation through certified partner network. Installation typically takes 2-3 hours by trained technicians. Included in some package deals, separate cost for others.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels6 records

Core offering

Charged B.V. (Sessy) designs, manufactures, and sells LiFePO4 home battery systems (5 kWh, 10 kWh, and 15 kWh Plus models) for Dutch homeowners with solar panels. The product includes a wall-mounted battery with built-in AC inverter, a wireless P1 smart meter reader, and proprietary smart energy management software that automatically optimizes charging/discharging for self-consumption, dynamic prices, and grid balancing. Sales occur directly online and through certified installer partners, with no subscription fees for software functionality.

Product overview

Sessy is a Dutch home battery brand developed and manufactured by Charged B.V. The product lineup consists of three home battery models — Sessy 5 kWh, Sessy 10 kWh, and Sessy Plus 15 kWh — all using safe LiFePO4 (lithium iron phosphate) battery chemistry. The core product includes a wall-mounted battery unit with built-in AC inverter, a P1 smart meter reader, wall bracket, and access to the Sessy Portal/app. The system operates in multiple modes: Zero-on-meter (self-consumption optimization), Eco-mode (price-based charging), GridEase (grid balancing), and trading mode. Multiple units can be combined for greater capacity, and the system integrates with home automation platforms via Open API. The 48V backup port is available as a technical feature for temporary emergency power. All products are produced in Andelst, Netherlands.

Differentiator

Problem solved

Functional benefit

Brands

• Sessy: Smart home battery product line including 5 kWh, 10 kWh, and 15 kWh (Sessy Plus) models for residential energy storage
• GridEase

Quantifiable outcome

• Customer satisfaction rating of 8.9 out of 10
• +4 more outcomes

Named customers3 records

Segments6 records

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration5 records

AI capability2 records

Feature7 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• EnecocoreGTM or Marketing PartnerStrategic partnership for GridEase smart grid balancing. Sessy integrates with Eneco's energy management to help stabilize the grid during peak hours. Includes co-marketing in Flevoland with €300 additional discount for Eneco customers plus access to Flevoland subsidy.
• Frank EnergiecoreGTM or Marketing PartnerPartnership for dynamic energy contract integration. Frank Energie offers Sessy customers enhanced earning opportunities through the imbalance market. Detailed payback time calculator available on Frank Energie website.
• 4bluecoreChannel Partner/ Reseller/ DistributorWholesale distributor partnership announced February 2025 to expand efficient market coverage for the rapidly growing home battery market in Netherlands.
• SolarNRGcoreChannel Partner/ Reseller/ DistributorWholesale distributor partnership announced February 2025 to expand efficient market coverage for the rapidly growing home battery market in Netherlands.
• Coöperatie ZeeuwindminorGTM or Marketing PartnerCollective purchasing action for members in Zeeland. Energy cooperative promotes Sessy to members with up to 20% collective discount including installation.
• om | nieuwe energieminorGTM or Marketing PartnerCollective purchasing action with Amsterdam-based energy supplier. Extended to include Energy VanOns customers after merger. Provides discounted access to Sessy for members.
• CurrenttminorGTM or Marketing PartnerJoint presence at Beurs Eigen Huis (Eigen Huis Fair) at Jaarbeurs Utrecht, March 2026. Demonstrates integrated home energy solutions.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Zonneplan: Large Dutch solar installer and energy services provider that bundles solar, batteries and dynamic-energy contracts — competing for the same Dutch homeowner with solar panels that Sessy targets.
• Enphase Energy (IQ Battery): Microinverter leader with modular LFP home battery portfolio and integrated energy management platform, competing for the same residential solar-plus-storage customer.
• HomeWizard: Dutch smart-home brand with a P1-port energy meter (the Wi-Fi P1 Meter) feeding a Home Energy Management app — sells into the same Dutch solar-homeowner segment with energy monitoring and automation rather than a battery.
• sonnen (Shell): Pioneering German residential LFP battery brand with integrated energy management and virtual power plant services — comparable premium home-storage offering across DACH and expanding across Europe.
• Tesla (Powerwall): Global leader in residential battery storage with Powerwall product line offering LFP chemistry, integrated inverter and smart energy management — directly comparable to Sessy across hardware, software and D2C positioning.
• BYD (Battery-Box Premium HVS/HVM): Large-scale LFP battery producer with widely deployed modular home battery product line targeting European solar-self-consumption households — comparable on chemistry, capacity and use case.
• Huawei FusionSolar / LUNA2000: Offers residential solar inverter plus modular LFP battery system aimed at maximizing self-consumption of rooftop PV, with smart energy management — direct substitute for Sessy.
• SolarEdge Energy Bank: Major solar inverter maker that has expanded into home batteries with bidirectional inverters and energy management software aimed at solar-self-consumption households.
• Growatt (ARK Battery / SPH series): Global residential inverter and home battery provider selling LFP systems with smart dispatch and dynamic-tariff support across European markets including the Netherlands.

Broad incumbents

• SMA Solar Technology: Long-standing German inverter leader moving into residential hybrid inverters and home battery conversions, overlapping with Sessy's inverter-and-software stack but as a broader portfolio player.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/charged-batteries

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about CHARGED (van de Sessy thuisbatterij)