BATTERY ENERGY STORAGETHAT EARNS
ISP Estonia OÜ develops, finances, installs and operates BESS (battery energy storage systems) and VPP (virtual power plant) projects — from 150 kW to utility scale — across Estonia, Latvia and Lithuania. Turn your grid connection into a passive income stream with zero capital investment.
BESS & VPP energiataristule
ISP Estonia OÜ specialises in the development, financing, deployment and operation of BESS and VPP projects across Estonia, Latvia and Lithuania. We handle everything — hardware, installation, grid compliance, market operations — and share the revenue with you.
Baby BESS
Containerised LFP lithium-ion batteries from 150 kW to 1 MW. Bidirectional, modular, grid-ready in 4–8 weeks — the ideal starting point for industrial and commercial sites.
Virtual Power Plant
Aggregated distributed assets operated as a coordinated VPP across FCR-D, FCR-N, aFRR and mFRR markets via our Elering BSP licence. Suitable for existing consumer connections from 500 kW.
Energy Arbitrage
Buy electricity at low prices on the Nord Pool day-ahead and intraday market, discharge at peak — fully automated price spread exploitation with no manual intervention.
Grid Services
Peak shaving, reactive power compensation and frequency response — generating revenue from every available market while reducing your own grid costs.
BESS & VPP kW-st kommunaalmastaabini
Whether you have a 150 kW commercial connection or a multi-megawatt industrial site, ISP Energy has a fully financed solution for your capacity. Every project is assessed, designed and operated by our team — at zero cost to you.
- Commercial and industrial buildings
- Agricultural sites and farms
- Renewable energy projects
- Cabinet or container format
- Bidirectional grid required
- FCR-D, FCR-N, aFRR, arbitrage
- Factories and logistics centres
- Data centres and district heating
- Flexible loads aggregated as VPP
- Industrial consumption from 500 kW
- Unidirectional load participation
- All reserve markets + mFRR 2026
- Utility grid connections
- Renewable energy integration
- Full project lifecycle management
- From site assessment to commissioning
- All voltage levels considered
- Maximum revenue from all markets
Baby BESS — industrial power, compact form
Our containerised BESS units are designed for rapid deployment at industrial facilities, warehouses, agricultural properties and commercial buildings across Estonia, Latvia and Lithuania.
Our BESS equipment
Containerised and cabinet BESS units from 500 kW to 1 MW — real equipment deployed at sites across Estonia, Latvia and Lithuania.
500 kW unit
Cabinet-frame LFP battery system for indoor and outdoor use.
1 MW unit
Shipping container format system — fully self-contained for outdoor installation.
Flexible Load Bank
Unidirectional consumption for FCR-N and demand response markets.
No battery? No problem
Sites with controllable industrial loads — motors, HVAC, production lines, data centre cooling — can participate in balancing markets without installing a battery.
Industrial Flexible Load Controller
Ready for FCR-N and demand response aggregation
Control cabinet
Compact installation, minimal footprint
Grid Interface Unit
Plug-in connection to your existing switchboard
Site Installation
Fast on-site commissioning
VPP Control System
Real-time monitoring and dispatch
How a virtual power plant works
A virtual power plant (VPP) is a digital platform that aggregates and controls distributed flexible energy assets — BESS units, industrial loads, generators and data centres. ISP Estonia OÜ operates VPP solutions from 500 kW.
Asset Aggregation
Aggregates multiple flexible resources under a single control system, enabling market participation with bids from as low as 0.1–1 MW.
TSO Signal Response
Receives activation signals from Elering and automatically adjusts load or generation within seconds.
Real-time Balancing
Balances supply and demand in real time across the entire portfolio, maximising revenue.
Reserve and Balancing Energy
Provides contracted reserve capacity (FCR, aFRR, mFRR) and activates balancing energy on demand.
Legal basis — Estonian Electricity Market Act
Under the Electricity Market Act (RT I, 2003, 25, 153 — last amended 2023), independent aggregation is permitted in Estonia. ISP Estonia OÜ holds a full BSP licence under Elering.
Baltic energy markets open to independent aggregation
Estonia leads the Baltic states in regulatory openness, with Latvia and Lithuania following closely. mFRR opens to independent aggregators in 2026.
FCR-D — Disturbance Reserve
The highest-priced Baltic balancing product. Hourly clearing. Min. bid 1 MW.
FCR-N — Normal frequency
Continuous frequency regulation ±0.1 Hz. Daily clearing. Min. bid 0.1 MW.
aFRR — Automatic restoration
Automatic frequency restoration reserve. Min. bid 0.1 MW.
mFRR — Manual restoration
Expected to open in 2026. Min. bid ~1 MW.
From site to revenue
A smooth 5-step process — from site assessment to your first monthly payment.
Site Assessment
Free assessment of your grid connection and revenue potential.
Contract and Design
A simple partnership agreement. ISP Energy manages permitting and engineering.
Installation
We procure and commission the unit within 4–8 weeks.
VPP Operation
Your unit joins the VPP, trading on FCR, aFRR and mFRR markets.
Revenue share
Monthly payments — 50% of net profit.
BESS or flexible loads
Not every site needs a full battery system. Flexible industrial loads can also participate in balancing markets.
Battery Energy Storage System
A full bidirectional battery system — can both charge from and export to the grid. Required for FCR-D, energy arbitrage and maximum revenue potential. ISP Energy finances 100% of CAPEX.
Industrial Flexible Loads and VPP
Factories, data centres, logistics centres and large commercial consumers can participate in FCR-N markets using existing controllable loads — no battery required.
What we need from you
To provide a binding commercial proposal, we need a few key details about your site. The site assessment is always free of charge.
Site Technical Data
- Connection voltage — LV, MV or HV; single- or three-phase
- Distance from switchboard or transformer — in metres
- Rent — agreed floor space rental if applicable
- Capacity charge — potential capacity tariffs at your site
Critical Information KEY!
- Available capacity (kW/MW) that can be reserved 24/7 — the most important parameter
- Bidirectional capability — whether the connection permits both import and export
- Peak and off-peak load patterns — helps optimise arbitrage revenue
Load banks / VPP: Unidirectional consumption from 500 kW is sufficient.
BESS & VPP passiivse sissetuleku mudel
Revenue depends on your unit size and current Baltic FCR market conditions. Your 50% share is paid monthly after deducting O&M, grid fees and insurance.
grid fees and insurance
FCR-D Reserve
The highest-priced Baltic balancing product. Hourly clearing. Min. 1 MW.
FCR-N Normal
Continuous frequency regulation ±0.1 Hz. Min. bid 0.1 MW.
Energy Arbitrage
Nord Pool intraday and day-ahead spot price optimisation — fully automatic.
aFRR and mFRR
Automatic and manual frequency restoration reserve. mFRR opens in 2026.
Who qualifies for BESS & VPP in Estonia, Latvia, Lithuania
Any site with a grid connection of 150 kW or more can earn passive income.
Industry and Warehouses
Factories, manufacturing companies and logistics centres with large grid connections.
Farms and Agriculture
Rural agricultural sites with outdoor space and medium-voltage connections.
Public Sector and Data Centres
Municipalities, schools, data centres and district heating companies.
Solar and Wind Energy Owners
Renewable energy producers who want to maximise the value of their grid connection.
All qualifying sectors
Benefits for the Baltic energy system
Every BESS and VPP asset we install strengthens the grid across Estonia, Latvia and Lithuania.
Grid Flexibility
Increases grid flexibility and system resilience.
Distributed Assets
Enables smaller distributed assets to participate in balancing markets.
Renewable Energy Integration
Supports greater integration of wind and solar energy.
Carbon-free Baltics
Contributes to national targets in line with the EU Green Deal.
No surprises No hidden costs
We prove our promises through actions.
Your Investment
Hardware, installation, commissioning, grid studies, permits — ISP Energy finances everything.
Partnership Period
Long-term agreement with early exit option after year 3.
Your Net Profit
After deducting O&M, grid fees and insurance, you receive half of everything remaining.
ISP Energy invests, you earn
ISP Energy finances the full CAPEX. You provide the property and grid connection. We share profits equally.
- No capital investment required from the client
- Full project financing by ISP Energy
- Full O&M management by ISP Energy
- 10-year revenue sharing agreement
- Early exit option after year 3
- Monthly transparent reporting
- Unit remains the property of ISP Energy
- Access to FCR-D, FCR-N, aFRR + mFRR from 2026
- Professional project management throughout the process
Net revenues from all market activities are shared equally, paid monthly. ISP Energy covers all operating costs before distribution.
Trusted by the grid
Estonian TSO — we operate as a licensed BSP under Elering's balancing platform.
Day-ahead and intraday energy exchange arbitrage across Baltic and Nordic markets.
European grid compliance with ENTSO-E Baltic synchronisation standards.
Tier-1 lithium iron phosphate cell suppliers with 15+ year warranty.
BESS & VPP — everything you need to know
Free BESS & VPP site assessment
Our team will assess your site, model the revenue potential and provide a binding commercial proposal within 10 business days — at no cost to you.