Seasonal thermal storage + flexibility

Turn each property into a thermal power plant.

We convert surplus solar PV into long-term winter heat savings— while connecting properties into a scalable flexibility fleet.

Heating cost
−50%
Payback
5 years
System life
25+ years
Owner savings fund deployment. Portfolio scale unlocks recurring flexibility revenue.
What we do

Store energy when it’s cheap. Use it when it matters.

One system creates two outcomes: lower heating and cooling cost for property owners, and scalable flexibility value as we expand the fleet.

Step
01
Capture surplus PV solar on-site
PV is the most predictable on-site energy source — we increase utilization and store midday peaks locally.
Step
02
Store in bedrock, not batteries
A stable, long-life thermal store built around the geology already under the property.
Step
03
Deliver winter heat + flexibility
Lower heating and cooling cost for the owner, while the fleet can earn from grid flexibility.

For property owners

Five years to repay. Twenty-plus years to benefit.

Under our co-invest model, the system is repaid over five years through heating and cooling savings. From year six onward, owners benefit from approximately 50% lower heating and cooling costs for the remaining 20+ years of system life — strengthening NOI and long-term asset value.

Unlocks significantly larger PV installations by absorbing midday peaks on-site
Strengthens operational independence through on-site energy storage
Long-life infrastructure asset with 25+ year lifetime
Owner results
Typical outcomes
Heating cost
−50%
Payback
5 years
System life
25+ years
Asset value
+20%
PV capacity unlocked
Enables significantly larger PV installations by capturing otherwise wasted midday peaks.
4x

For investors

We scale a connected fleet of controllable thermal assets.

Each deployment stands on strong owner economics — five-year payback and structurally lower long-term heating and cooling cost. This makes adoption rational at site level and unlocks scalable aggregation.

Per site capacity
~1.5 MW dispatchable down-regulation capacity.
Portfolio scale
100 sites ≈150 MW aggregated controllable power.
Cost advantage
Flexibility cost per MW ~1/10 of battery systems.
Structural tailwinds
More renewables increase volatility and the value of control.
The model
Owner economics fund deployment.
Buildings adopt for heating and cooling savings. Aggregation converts those assets into infrastructure-scale flexibility.
Value engines
• Site-level savings and asset value uplift
• Portfolio-level flexibility revenue
System value

One system. Two outcomes.

Surplus PV is captured, shifted in time, and monetised.

Rooftop PV
High midday generation
Re:notch
Capture • Optimise • Dispatch
Winter heat
Lower long-term cost
Grid flexibility
New recurring revenue

Why we’re unique

10x
higher peak charging power than conventional seasonal ground storage — built to capture PV midday bursts.

Peak absorption is the moat.

Traditional ground storage systems are optimized for steady seasonal loads — not short bursts of high PV power. Re:notch is engineered for rapid, high-intensity charging during midday peaks, enabling megawatt-scale flexibility per property.

Proof

Validated and supported by top institutions.

Research validation and innovation support — building credibility while we scale deployments.

Technical validation
RISE
KTH
Commercial + ecosystem support
STING
Vinnova
Ideon
MassChallenge
Circular Valley

Social proof

“Solarity Living™ enables strong property value uplift from lower and predictable energy costs and increased solar margins.”
Real estate leader — Managing a €200M+ asset portfolio
Team

Built by operators.

We combine deep technical execution with a clear go-to-market for scaling a connected fleet of controllable thermal assets across Europe.

Erik Kayser
Erik Kayser
Co-founder & CTO
Scaled Implement Consulting Group Sweden from 2 to 150 people and commercialized advanced building materials globally.
Builds the technical system at Re:notch — from architecture to real-world deployment.
Likes bouldering, good coffee, and occasionally sleeping.
Oliver Vukic
Oliver Vukic
Co-founder & CEO
Built growth strategy for a major Nordic construction and property group, and helped scale a €59m Series B energy startup in e-fuels and hydrogen.
Leads commercial strategy and scaling of Re:notch across Europe.
Enjoys skiing in winter, lifting weights year-round, and catching up over a well-earned beer after work.
Filip Vukic
Filip Vukic
Co-founder & Head of AI
Background in Engineering Mathematics; built high-precision anomaly detection systems at IKEA and scaled digital brands to 200M+ reach.
Builds Re:notch’s AI layer — forecasting, optimisation, and fleet control.
Builds side projects for fun, enjoys skiing, football, and a quick game of bullet chess.

Contact

Want the deck or a site assessment?

We’ll reply quickly. Tell us if you’re a property owner or an investor.

For property owners

Get a quick view on savings, payback and feasibility.

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For investors

Get the investor deck and talk scaling + fleet economics.

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