BATTERY STORAGETHAT EARNS
We develop, finance, deploy and operate Battery Energy Storage Systems and Virtual Power Plants (150 kW–utility scale) across the Baltic region — turning your grid connection into a passive income stream with zero capital investment.
Smart energy infrastructure
ISP Estonia OÜ specializes in the development, financing, deployment and operation of VPP and BESS projects. We handle everything — hardware, installation, grid compliance, market operations — and share the revenue with you.
Baby BESS
Containerised LFP lithium-ion storage units from 150 kW to 1 MW. Bidirectional, modular, grid-ready in 4–8 weeks — the ideal entry point for industrial and commercial sites.
Virtual Power Plant
Aggregated distributed assets operated as a coordinated VPP on FCR-D, FCR-N, aFRR and mFRR markets via our Elering BSP license. Suitable for existing consumption connections from 500 kW.
Energy Arbitrage
Buy electricity at off-peak prices on Nord Pool day-ahead and intraday markets, release at peak — fully automated spread capture with no manual intervention required.
Grid Services
Peak shaving, reactive power compensation, and frequency response — generating revenue from every available market while reducing your own grid costs.
From kW to utility scale
Whether you have a 150 kW commercial connection or a multi-megawatt industrial site, ISP Energy has a fully-financed solution designed for your capacity. Every project is assessed, designed and operated by our team — at zero cost to you.
- Commercial & industrial buildings
- Agricultural sites & farms
- Renewable energy projects
- Cabinet or container format
- Bidirectional grid required
- FCR-D, FCR-N, aFRR, arbitrage
- Factories & logistics centres
- Data centres & district heating
- Flexible loads aggregated as VPP
- Industrial consumption from 500 kW
- One-directional load participation
- All reserve markets + mFRR 2026
- Utility-scale grid connections
- Renewable energy integration
- Full project lifecycle management
- Site assessment to commissioning
- All voltage levels considered
- Maximum revenue across all markets
Industrial power,
compact form
Our containerised BESS units are engineered for rapid deployment in industrial sites, warehouses, agricultural properties and commercial buildings across Estonia, Latvia, and Lithuania. ISP Energy manages the complete project lifecycle — from site assessment and grid studies through to permitting, procurement, and market operation.
Our devices
Containerised and cabinet BESS units from 500 kW to 1 MW — real equipment deployed at Baltic sites. Every unit is procured, installed, and operated by ISP Energy at zero cost to the site owner.
500 kW Unit
Cabinet-format LFP battery system, designed for indoor and outdoor deployment with full bidirectional capability.
1 MW Unit
Shipping-container format system — fully self-contained, suitable for outdoor installation at industrial sites and farms.
Flexible Load Bank
For sites that cannot export to the grid — one-directional consumption is sufficient 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. One-directional consumption is enough. ISP Energy aggregates your flexible capacity into our Virtual Power Plant and pays you a monthly revenue share.
Industrial Flexible Load Controller
Ready for FCR-N & demand-response aggregation
Control Cabinet
Compact installation, minimal footprint
Grid Interface Unit
Plug-in integration with your existing switchboard
Site Installation
Rapid on-site commissioning
VPP Control System
Real-time monitoring & dispatch
How the VPP works
A Virtual Power Plant (VPP) is a digital platform that aggregates and controls distributed flexible energy assets — BESS, industrial loads, generators, and data centers — coordinating them as a single controllable unit in reserve and balancing markets. ISP Estonia OÜ operates VPP solutions for existing electricity consumption connections from 500 kW.
Asset Aggregation
Aggregates multiple flexible resources — BESS units, industrial loads, district heating, logistics — under a single control system, enabling participation in markets that require minimum 0.1–1 MW bids.
TSO Signal Response
Receives activation signals from the transmission system operator (Elering) and automatically adjusts load or generation across all assets within seconds.
Real-Time Balancing
Balances supply and demand in real time across the entire portfolio, maximising revenue while maintaining full grid compliance and protecting clients' primary operations.
Reserve & Balancing Energy
Provides contracted reserve capacity (FCR, aFRR, mFRR) and activates balancing energy on demand — generating revenue from every market simultaneously.
Legal Basis — Estonian Electricity Market Act
Under the Electricity Market Act (RT I, 2003, 25, 153 — most recently amended 2023), independent aggregation is permitted in Estonia, allowing flexible resources to be combined outside the traditional retailer–Balance Responsible Party (BRP) chain. Independent aggregators operate as Balance Service Providers (BSPs) and are not tied to a specific retailer or BRP. ISP Estonia OÜ holds a full BSP license under Elering and handles all financial settlements with balance responsible parties in accordance with the Estonian market model.
Open to independent aggregation
Estonia leads the Baltics in regulatory openness. Multiple balancing markets are already live — with mFRR opening to independent aggregators in 2026.
FCR-D — Disturbance Reserve
Frequency Containment Reserve for disturbances — the highest-paying Baltic balancing product. Cleared hourly with capacity + energy payments. Min. bid 1 MW. Open to independent aggregation.
FCR-N — Normal Frequency
Continuous frequency regulation in the normal operating band (±0.1 Hz). Daily clearing, capacity-only payment. Min. bid 0.1 MW. Open to independent aggregation — accessible even for flexible loads.
aFRR — Automatic Restoration
Automatic Frequency Restoration Reserve — contracted capacity payments plus activation energy. Min. bid 0.1 MW. Open to independent aggregation and expanding across the Baltic region.
mFRR — Manual Restoration
Manual Frequency Restoration Reserve — expected to open for independent aggregation in 2026 per Elering's TSO working group roadmap (Q1 2025). Min. bid ~1 MW. A significant new revenue stream for all active VPP participants.
From site to revenue
A seamless 5-step process — from site assessment to your first monthly payment. ISP Energy manages every stage including permitting, financing, equipment procurement, construction, and commissioning.
Site Assessment
Free evaluation of your grid connection, capacity, voltage level, and revenue potential.
Contract & Design
Simple partnership agreement. ISP Energy handles grid studies, permitting, and technical design.
Installation
We procure, deliver and commission your BESS or flex load unit within 4–8 weeks.
VPP Operation
Your unit joins our Virtual Power Plant, trading on FCR, aFRR, mFRR and Nord Pool markets.
Revenue Share
Monthly payments — 50% of net profit. Transparent reporting every month.
BESS or flexible loads
Not every site needs a full battery system. Flexible industrial loads and load banks can also participate in balancing markets — with simpler grid requirements and faster deployment.
Battery Energy Storage System
Full bidirectional battery system — can both charge from the grid (import) and export back. Required for FCR-D, energy arbitrage, and maximum revenue potential. LFP lithium-ion, 150 kW to utility scale, containerised or cabinet format. ISP Energy funds 100% of CAPEX.
Industrial Flexible Loads & VPP
Factories, data centres, logistics hubs, district heating facilities, and large commercial consumers can participate in FCR-N and demand-response markets using existing controllable loads — no battery required. ISP Estonia OÜ specialises in integrating industrial and infrastructure facilities into VPP platforms through existing electricity consumption connections from 500 kW.
What we need from you
To provide a binding commercial proposal, we need a few key details about your site and grid connection. Every connection point is unique — our experts perform detailed technical and commercial assessments to determine project viability. The site assessment is always free.
Site Technical Details
- Connection voltage — LV, MV, or HV; single or three-phase
- Distance to switchboard or transformer — in metres
- Rental fee — if applicable, agreed floor area rental for the unit
- Power fee — any applicable power tariff or grid cost at your site
Critical Information NB!!!
- Free capacity (kW/MW) that can be reserved 24/7 — the most important figure for revenue modelling
- Bidirectional capability — whether your connection allows both import and export (required for BESS)
- Peak and off-peak load patterns — helps optimise arbitrage revenue
Load banks / VPP: One-directional consumption from 500 kW is sufficient for FCR-N, demand-response, and VPP participation.
Pure passive income
Revenue depends on your unit size, connection type, and current Baltic FCR market conditions. Your 50% share is paid monthly after ISP Energy deducts all operating costs including O&M, grid fees, and insurance. We provide transparent monthly reporting so you always know exactly where your income comes from.
grid fees & insurance
FCR-D Reserve
Highest-paying Baltic balancing product. Hourly clearing with capacity + energy payments. Min. bid 1 MW.
FCR-N Normal
Continuous frequency regulation ±0.1 Hz. Capacity-only payment, daily clearing. Min. bid 0.1 MW — accessible for flexible loads.
Energy Arbitrage
Nord Pool intraday and day-ahead spot price optimisation. Buy low at night, sell high at peak — fully automated.
aFRR & mFRR
Automatic and manual Frequency Restoration Reserve — capacity payments plus activation energy. mFRR opening to independent aggregation in 2026.
Your site is a power asset
Any site with a grid connection of 150 kW or more can generate passive income. ISP Energy is particularly interested in industrial, commercial, and infrastructure facilities — no energy sector experience required.
Industrial & Warehouses
Factories, manufacturing plants, and logistics centres with large grid connections. Peak shaving reduces your own bills while balancing market revenue adds passive income.
Farms & Agri-businesses
Rural agricultural sites with outdoor space and a medium-voltage connection — especially suited for outdoor container deployment. Renewable energy projects welcome.
Public, Data & District Heat
Municipalities, schools, government buildings, data centres, and district heating utilities can monetise grid capacity at zero risk and zero operational complexity.
Solar & Wind Site Owners
Renewable energy producers looking to maximise grid connection value, participate in balancing markets, and support renewable integration across the Baltic grid.
All eligible sectors
Benefits for the power system
Every BESS and VPP asset we deploy strengthens the Baltic grid and accelerates Estonia's transition to a carbon-neutral, smart power system.
Grid Flexibility
Increases grid flexibility and system resilience — critical as Baltic states synchronise with ENTSO-E continental Europe in 2025.
Distributed Assets
Enables participation of smaller distributed assets that would otherwise be excluded from balancing markets due to minimum bid requirements.
Renewable Integration
Supports higher integration of wind and solar energy by absorbing excess generation and releasing it when demand peaks.
Carbon Neutral Estonia
Contributes to Estonia's national target of a carbon-neutral and smart power system — aligned with EU Green Deal objectives.
No surprises. No hidden costs.
We put our money where our mouth is. If your site qualifies, we cover every euro of investment — from hardware to grid compliance — and you start earning from day one of operation.
Your Investment
Hardware, installation, commissioning, grid studies, permitting — ISP Energy funds everything.
Partnership Term
Long-term agreement with early exit option after year 3. Stable, predictable revenue from day one.
Your Net Profit
After ISP Energy deducts all O&M, grid fees, and insurance — you receive half of everything left.
We invest, you earn
ISP Energy finances the full CAPEX — hardware, installation, grid compliance, permitting, and market integration. You provide the real estate and grid connection. We split the profit equally and manage everything else.
- Zero capital investment required from the client
- Full project financing by ISP Energy and partners
- Complete O&M handled by ISP Energy
- 10-year revenue sharing agreement
- Early exit option after year 3
- Monthly transparent reporting
- Unit remains ISP Energy property — no liability for you
- BRP financial compensation handled per Estonian market model
- Access to FCR-D, FCR-N, aFRR + mFRR from 2026
- Professional project management throughout
Net revenues from all market activities are split equally, paid monthly. ISP Energy covers all operating costs, maintenance, insurance, and grid fees before the split. As an independent aggregator and BSP, ISP Energy handles all financial settlements with balance responsible parties (BRPs) in accordance with the Estonian market model. Our clients benefit from additional revenue streams without capital expenditure, operational complexity, or market risk.
Trusted by the grid
Estonian TSO — we operate as licensed BSP under Elering's balancing platform. Full compliance with Estonian market model and independent aggregation framework.
Day-ahead and intraday power exchange for energy arbitrage across the Baltic and Nordic markets.
European network compliance under ENTSO-E Baltic synchronisation standards and grid code requirements.
Tier-1 lithium iron phosphate cell suppliers with 15+ year warranty. Safe, stable chemistry for long-term deployment.
Everything you need to know
Request a free
site assessment
Our team assesses your site, models the revenue potential across all available markets, and delivers a binding commercial proposal within 10 business days — at no cost to you. Whether you have a 150 kW connection or a multi-megawatt industrial site, we have a solution designed for your capacity.