Integration option Layer 02 · System

Cold Chain & Cold Storage.

Distributed PCM cooling-battery modules engineered for food cold chain logistics and industrial cold storage — extending outage tolerance, reducing compressor short-cycling, shifting cooling load, and holding cold-room temperatures steady through demand-response and grid events.

Built under our EDGE Material Inside model with downstream partner Solar Tribe, who owns the equipment patent and delivers the system.

AI Thermal Sizing Tool ↗ Request System Review

Material Layer

UltraST PCM · SemiST plates · sub-zero chemistries

System Layer

Cooling-battery modules · In-room arrays

Outcome direction

Outage tolerance · Cycling reduction · Temperature stability

Delivery

Site survey · Pilot bay · Validation

— Featured partner product · EDGE Material Inside · by Solar Tribe

SolarCool Kit — modular PCM cold storage that installs without touching your refrigeration.

A plug-and-play UltraST PCM cooling-battery built around our material by Solar Tribe. Drop-in modules charge during off-peak windows, then release stored cold into the room — extending hold time during outages and shaving compressor duty during peak hours.

2.39×

Longer cold
retention vs ice packs

41.6%

Energy savings
vs ice packs

<2h

Install time
per module

Refrigeration
modification

View SolarCool Kit ↗ Request System Review

01Problem context

→

02Material / System option

→

03Project conditions

→

04Calculation tool

→

05Validation & review

01 / Problem context

Cold storage runs on the edge of three pressures.

1. Compressor cycling. Door openings, pallet turnover, and partial loads drive compressors into short-cycle behavior — high wear, poor efficiency, and uneven cold-room temperatures.

2. Grid and tariff exposure. Refrigeration is one of the largest electrical loads on site. Peak demand charges and time-of-use windows make every kWh shifted out of peak hours economically meaningful.

3. Outage tolerance. A power interruption or compressor fault gives operators a narrow window before product temperature breaches spec. Inventory at risk grows with hold time.

Adding more compressor capacity addresses none of these directly. Distributed PCM cooling capacity does. It stores cold during off-peak windows, releases it back into the room when needed, and gives operators an extended buffer when active cooling is interrupted.

Representative room behavior

Cold-room temperature — with and without distributed PCM buffer during a 4-hour cooling outage

Room temperature — no buffer Room temperature with distributed PCM

02 / Material & System options

From material to module.

Two integration paths — depending on whether you want to specify your own thermal subsystem around our materials, or take a pre-engineered module from us.

— Material option

UltraST PCM + SemiST plates

Specify Passive Edge cold-side chemistries into your own cooling-battery design. Use SemiST PCM plates as the storage element, with chemistry tuned to your room’s setpoint window.

PHASE POINTTunable, sub-zero to +10 °C window
FORM FACTORPlates · Modules · Custom geometry
DELIVERSMaterial + technical data package
FIT FORRefrigeration integrators with in-house design capacity

— Integration option · via Solar Tribe

SolarCool Kit (UltraST inside)

Pre-engineered distributed cooling-battery modules built by Solar Tribe around our UltraST PCM. Plug-and-play installation in under 2 hours, with no refrigeration modification required — measured at 2.39× longer cold retention and 41.6% energy savings vs ice-pack baseline.

FORM FACTORModular plug-and-play kit · wall-mounted & container
PROOF POINTS2.39× retention · 41.6% energy savings · <2 h install
DELIVERSEquipment by Solar Tribe + integration spec + pilot plan
FIT FORCold storage operators wanting validated, ready-to-deploy blocks
LEARN MOREsolarcool product page ↗

02 · The integration option in detail

SolarCool Kit — a plug-and-play UltraST cooling battery for the cold room.

SolarCool Kit — modular UltraST PCM cooling battery by Solar Tribe

— Product · SolarCool Kit

UltraST PCM · by Solar Tribe PE / 02

SolarCool Kit is a stackable cooling-battery built around our UltraST PCM by downstream partner Solar Tribe. Modules charge cold during off-peak and grid-surplus windows, then release it back into the room on demand — buffering temperature through outages, peak tariffs, and demand-response events without touching your existing refrigeration.

— 01 Install

Under 2 h · zero retrofit

Stackable modules drop into the room as-is. No compressor, ducting, or controls modification — and nothing to re-certify on your existing plant.
— 02 Operation

Off-peak charge, on-demand cold

Stores cold when power is cheap or surplus, discharges it into the room during peak hours and grid events — cutting compressor short-cycling.
— 03 Resilience

Rides through outages

Distributed in-room arrays hold cold-room temperature steady for hours after a power loss, extending the safe window before product is at risk.
— 04 Material inside

All-solid UltraST PCM

The cold-side chemistry is our UltraST PCM — high-conductivity, leak-free, >10,000-cycle phase-change material, tuned to your setpoint window.

— Attribute	SolarCool Kit (UltraST inside)	Ice packs / gel-pack backup
Cold retention	2.39× longer ↑ hold time	Baseline — melts and drifts
Energy use	41.6% lower ↓ kWh	Baseline — heavy compressor duty
Install time	< 2 h per module	Manual pre-conditioning per cycle
Refrigeration impact	Zero modification	None — but no buffering benefit
Reusability	> 10,000 cycles · all-solid	Single-use / short reuse life
Demand-response ready	Yes — shifts load off peak	No

Proof points are from Solar Tribe field measurement against an ice-pack baseline; actual figures are tuned per room setpoint and validated during the pilot bay.

Explore the SolarCool Kit product site ↗ Equipment by Solar Tribe · UltraST inside

— Partnership model · EDGE Material Inside

A micro/nano-encapsulation platform at the core —
co-building a global thermal-buffer ecosystem.

We build the material; partners build the equipment. Cold-room cooling-battery modules like the one shown above are not Passive Edge equipment — they are co-developed with downstream partners under our EDGE Material Inside model: Passive Edge supplies UltraST PCM material and chemistry, while the partner designs, manufactures, certifies, and sells the equipment.

The system you see here is an example: equipment patent and commercial ownership sit with Solar Tribe, who builds the cooling-battery system around our material. We deliberately stay in the material layer — it’s how we let many industries get to a thermal-buffer outcome without anyone competing for the same customer.

If you’re an OEM, system integrator, or refrigeration specialist evaluating cold-storage applications, talk to us about an EDGE Inside partnership — we frequently refer end-customer projects out to partners better placed to deliver them.

— Layer 01

Passive Edge · Material

UltraST PCM, chemistry, encapsulation, technical data package.

— Layer 02

Solar Tribe · Equipment (SolarCool Kit)

System design, equipment patent, manufacturing, certification, sales. View product ↗

— Layer 03

Cold storage operator

End customer: refrigeration warehouse, 3PL, food & beverage facility.

— 01

We don’t sell equipment.

No competing system in the same room. Material supply only.

— 02

Partners own the system.

Equipment patents, branding, and customer relationship rest with the partner.

— 03

We refer customers out.

Inbound cold-storage projects route to the right partner, not back to us.

03 / Project conditions required

What we need before a fit assessment.

The more of the following you can share early, the faster we can return a useful response. None of these constitute a commitment from either side.

— Room profile

Room volume, setpoint window, average door-opening frequency, pallet turnover, internal heat load.

— Refrigeration system

Compressor count and capacity, refrigerant, evaporator topology, defrost cycle, current cycling behavior.

— Site & constraints

Location, ambient envelope, available floor / wall area, ceiling height, structural load limits, electrical capacity.

— Tariff structure

Energy rate, demand charges, time-of-use windows, peak / off-peak deltas, demand-response program eligibility.

— Target outcome

Outage tolerance window, cycling reduction target, peak-hour energy shift, product spec / temperature ceiling.

— Timeline & stage

New build vs. retrofit. Single pilot room vs. portfolio rollout. Existing refrigeration partners.

05 / Validation & review path

How a project moves from conversation to deployment.

We work in clearly-bounded stages. No stage commits the next. Each stage produces a document you can use internally — even if you don't proceed with us.

— 01

Room conditions submitted

You share room profile, refrigeration system, tariff, and target outcome. We return a written fit assessment within ~5 business days.

— 02

Material / system review

Joint review of chemistry, plate geometry, and module configuration for your specific room. Includes a technical data package and integration spec.

— 03

Pilot bay plan

Scoped pilot in a single cold room or bay, with instrumentation, success criteria, and a defined validation window covering cycling and outage scenarios.

— 04