Physical locations of our datacenter

created: Friday, Jun 6, 2025

At Down To Zero (DTZ) we believe a modern cloud platform can — and should — be both blazingly reliable and gentle on the planet.
Our answer is a twin-site architecture that pairs a private, solar-powered micro-datacenter in Leipzig with a fully redundant footprint inside Hetzner’s flagship facility in Falkenstein. Together they give us three things every customer cares about:

Consistent performance (low-latency paths inside Germany)
Provable sustainability (100 % renewable energy, measured & monitored)
Fault tolerance (geographic isolation, automated fail-over)

Below we dig into the what, why, and how.

Why Germany?

Germany sits at the crossroads of Europe’s internet backbone, offering sub-30 ms round-trip times to most EU capitals and direct links to the major Internet Exchange Points (IXPs) in Frankfurt (DE-CIX) and Berlin. Strict environmental and privacy regulations (think Energieeffizienzstrategie and GDPR) also align with our values:

Energy mix — grid electricity here already skews heavily toward renewables, giving us a cleaner baseline.
Data sovereignty — all bits stay on German soil, simplifying compliance for EU-focused customers.
Fiber density — abundant dark-fiber routes mean we can lease dedicated 40 Gbps circuits without eye-watering costs.

Twin-site strategy at a glance

Responsibility	Leipzig	Falkenstein (Hetzner)
Workload type	Asynchronous / batch	Synchronous / latency-critical
Power source	On-site PV array	100 % renewable grid contracts
Operating mode	Eco-mode (compute only when sun shines)	24 × 7 always-on
PUE* snapshot	n/a	1.18 (Hetzner public report)

*PUE = Power Usage Effectiveness, lower is better.

Private solar-powered location — Leipzig

Our Leipzig cluster is literally fueled by daylight:

Micro-grid controller cuts in compute as soon as generation outstrips local demand + battery trickle charge.

Typical tasks here include CI/CD pipelines, nightly ETL, large-scale rebuilds, and generative-AI batch inference — anything that tolerates a flexible runtime window.

Hetzner datacenter — Falkenstein

For real-time APIs, ingress proxies, we anchor in Hetzner’s facility:

Power — 100 % renewable (hydro + wind certificates), N+1 diesel backup.
Cooling — indirect free cooling for ~70 % of the year; hot-aisle containment elsewhere.
Security — 24/7 staffed NOC, biometric access, CCTV, ISO 27001 & PCI-DSS alignment.

We also spin up overflow async pods here when Leipzig’s sky goes grey — maintaining job SLA without compromising eco-goals.

Bringing it all together

Two locations, one mission: deliver production-grade cloud services while driving operational carbon to zero.
If you’re looking for a platform that puts sustainability on equal footing with speed and uptime, we’d love to hear from you.