When eternity holds its breath: Why museums need a life insurance policy made of lead and lithium

In an era where our power grids are more volatile than they have been in decades due to extreme weather, decentralized feed-in, and dilapidated infrastructure, the battery in the basement is – to put it somewhat bluntly – the only thing that protects human history from entropy.

Physics of Decay: Why Darkness Is Harmful

If you ask laypeople what the biggest problem would be during a power outage at a museum, they'll say: "That someone will take the Rembrandt off the wall." That's Hollywood. The reality of conservation is far more gruesome because it happens completely silently. Its name is: relative humidity.

Almost everything we keep in museums – canvas, oak, parchment, bone, textiles – is hygroscopic. These materials behave like sophisticated lungs: they absorb moisture from the air and release it again. The goal of climate control (HVAC) technology is to confine this state within a strict set of, for example, 20 degrees Celsius and 50 percent relative humidity.

"If active climate control fails, we experience the phenomenon of rapid fluctuations," according to the current state of conservation science (quote summarizes the actual stance of several conservators).

In a fully occupied exhibition space, the temperature rises by two to three degrees within 20 minutes due to the body heat of the people, even with the ventilation system not running. At the same time, the relative humidity drops rapidly. A Renaissance wooden panel reacts to this with an immediate contraction. The primer cannot accommodate this movement – ​​the ancient paint cracks, warps, and flakes off

This is being discussed intensively within the framework of the Bizot Green Protocols (international guidelines for museum climate, most recently debated extensively in 2023/2025*) as well as in specialist publications such as The Art Newspaper (dossiers on “Museum Climate Control”, 2025*).

Damage that occurs in 45 minutes and that three restorers cannot reverse in two years of work. The power outage itself is therefore not the catastrophe. The catastrophe is the breakdown of the thermodynamic barrier.

The domino effect: When the brain of the house dies

But the climate is only the final boss. On the way there, the building dies a thousandfold digital death.

Let's take a look at the cascade of a modern blackout:

• Access control: Electronic locking systems face a logical paradox. In the event of a power outage, should they "fail-safe" mode (unlocking all doors to allow escape) or "fail-secure" mode (locking all doors to prevent unauthorized access)? Buildings are typically divided into zones: escape routes open, and storage doors lock magnetically. If the backup battery fails, employees could be trapped inside the vault in the worst-case scenario.
• The eyes: IP-based surveillance cameras are now mostly connected to PoE (Power over Ethernet) switches. If the switch fails, 60 cameras are instantly blind.
• The lungs of safety: Modern museums don't use simple ceiling-mounted smoke detectors, but highly sensitive aspirating smoke detectors (ASDs). These actively draw air continuously through tiny pipe systems and analyze it for the smallest pyrolysis particles. If the fan in this system stops, the museum is effectively blind to smoldering fires.

Voices from the engine room: The administrators' anger

Anyone who wants to know the unvarnished truth about the state of these systems shouldn't read glossy brochures. They must descend into the anonymous confessionals of the internet.

In the r/sysadmin subreddit (the global hub for system administrators), the topic of "Museum UPS" is a recurring trigger for post-traumatic stress disorder. The frustration of IT managers in cultural institutions can be reduced to a fundamental equation: visible prestige vs. invisible foundation.

“Our director just approved €250,000 for an ‘Immersive AI Room,’”writes a user named ByteCurator. “But when I presented him with the €8,500 estimate for the routine cell replacement of our main UPS, he said, ‘Can’t we postpone that for another two years? It’s still blinking green.’ Three weeks later, we had a brownout in the neighborhood. The servers crashed badly, the provenance research SQL database was corrupted. Three days of manual work for four student assistants. But hey, the floating 3D images in the foyer looked great until the lights went out.”

In the r/MuseumPros , the deep divide between IT and curators is laid bare. Here, the prevailing wisdom is clear: IT UPS systems and museum UPS systems have fundamentally different needs. An IT department wants a UPS that keeps the system running for 15 minutes – just long enough to cleanly shut down the virtual machines. A curator, however, needs a UPS that keeps the system running for 18 hours because you can't "shut down" .

on LinkedIn , facility managers from major European institutions are debating the dilemma of sustainability. The buzzword for 2024 to 2026 is "Green UPS." Museums are under immense political pressure to reduce their carbon footprint. The constant standby power consumption of huge double-conversion converters (DC converters), which first convert electricity to direct current and then back to perfect, sinusoidal alternating current, consumes vast amounts of energy.

The question circulating in expert groups there is: How much loss of efficiency (and thus risk) do we accept through modern, energy-saving Eco modes?

The technical arsenal: off-the-rack or bespoke?

To safeguard against worst-case scenarios, the technical management now relies on a three-tiered arsenal:

• The millisecond wall (VFI-UPS): Online continuous converter. It galvanically isolates the loads from the mains. If lightning strikes outside or the power grid collapses, the painting in the climate-controlled display case remains completely unaffected.
• The bridge (the accumulator): The chemical storage device. This is where the biggest technological change is currently taking place, from the classic lead-acid gel battery (VRLA) to lithium-ion and LiFePO4 cells.
• The long-distance runner (NEA): The stationary emergency power generator (diesel or gas) that takes over as soon as the battery runs low.

And it is precisely at the interface between stage 1 and stage 2, at the accumulators, that the greatest drama of museum architecture is revealed in practice: the space.

The world's most important collections are not stored in functional concrete blocks in the middle of nowhere, but in magnificent neoclassical buildings, baroque palaces, or labyrinthine turn-of-the-century structures. A standard industrial rack system for lead-acid batteries can easily weigh several tons and requires strictly climate-controlled rooms with explosion-proof ventilation (keyword: hydrogen gas formation). In a cellar vault from 1880 with a ceiling load of 250 kilograms per square meter and winding, 80-centimeter-wide corridors, this is an architectural impossibility.

This is where the convenient click through the B2B catalog of the wholesale giants falls short. Technical managers who want to sleep soundly at night aren't looking for "a battery", but for engineering expertise. They end up with specialized manufacturers and solution providers like pro-akkus GmbH, from whom batteries can be purchased online – for various projects from small to medium-sized galleries and museums.

The advantage of such collaboration lies in the details: If space is extremely limited, the storage system must be built vertically or around corners. If the city's fire safety officer has a fit at the thought of lithium cells in the basement of a listed building, highly specific, intrinsically safe cell chemistries (such as LiFePO4) are required. These should virtually eliminate thermal runaway, coupled with a custom-designed battery management system (BMS)that continuously reports each individual cell to the building management system. It's the difference between an off-the-rack suit that's too tight at the shoulders and a bespoke tailor.

Case study: When the backup itself becomes a problem – The Museum Ludwig (2025)

That the issue of emergency power is not an abstract, theoretical risk was demonstrated in late October 2025 in the heart of Germany. On the evening of October 27, a power outage lasting several hours occurred in the large Cologne building complex that houses the renowned Cologne Philharmonic and the internationally acclaimed Museum Ludwig (one of the most important museums for 20th and 21st century art). (Sources: Kölner Stadt-Anzeiger + Kölnische Rundschau*)

The actual power outage was quickly resolved, but then the real nightmare began for those in charge: the building's emergency generator failed to function. As the city's building management department discovered during tests the following Tuesday, the internal system was faulty. The official diagnosis, released to the press, stated: "Based on current information, the emergency generator would not start in the event of another power outage."

The consequences were drastic. Neither the evacuation routes (emergency lighting) nor the continuous monitoring and climate control of the priceless artworks could be guaranteed in the event of another power outage. Therefore, the Museum Ludwig and the Philharmonie completely closed to the public for days. Concerts had to be canceled, and exhibition spaces remained dark.

It wasn't a problem with the external power supplier (RheinEnergie), but a purely internal failure of the backup infrastructure. Anne Niermann, a long-time member of the museum's press team, summed up the institution's dismay to the Cologne newspaper Kölner Stadt-Anzeiger at the time: "I've never experienced anything like this before. And I've really worked here for a long time."

This incident in Cologne painfully demonstrates that it's not enough for electricity to simply come from the wall socket. If the downstream emergency power and UPS technology fails to kick in at the crucial moment – ​​or fails during testing – the entire operation of a museum comes to a standstill.

The ironclad checklist for decision-makers

When you enter your office tomorrow morning as the commercial or technical manager of an exhibition center, ask your team these four questions. If even one of the answers "I think so ," you have an urgent area for action:

1. [ ] The “Pull-the-Plug” test: When was the system last tested under real full load (in the height of summer, with cooling running) by flipping the main switch? (Simulations on paper are worthless).
2. [ ] The bridging lie: Is the UPS concept of IT (server focus) logically and temporally synchronized with the UPS concept of building technology (climate focus)?
3. [ ] The sensor trap: Do the data loggers that record temperature and humidity have their own independent power supply? (If the power fails, you must be able to prove afterwards exactly when the limits were exceeded – important for insurance purposes!).
4. [ ] The SLA window: Does the battery supplier's maintenance contract guarantee a response time of less than four hours, including guaranteed spare parts availability, or will you have to wait three weeks for a replacement board from Asia in an emergency?

Heroes in the Dark

When the regular lights in the Old Masters came back on after two minutes, the visitors did what people do: they blinked briefly, shrugged, and went back to listening to their audio guides. No one clapped. No one called for the building technician to shake his hand.

And that is the greatest triumph that uninterruptible power supplies can achieve. Their absolute perfection is proven by complete uneventfulness.

Rembrandt's paintings, sculptures , and Beuys' installations belong to humanity. But the fact that our great-grandchildren can still see them in their original form is not solely thanks to the geniuses who created them. It is also thanks to a handful of engineers, a clever loading system, and a few unassuming, perfectly temperature-controlled metal boxes on the second basement level.

Joachim Rodriguez y Romero

Owner and Managing Director of Kunstplaza . Publicist, editor, and passionate blogger in the fields of art, design, and creativity since 2011. Graduated with a degree in web design from university (2008). Further developed creative techniques through courses in freehand drawing, expressive painting, and theatre/acting. Profound knowledge of the art market gained through years of journalistic research and numerous collaborations with key players and institutions in the arts and culture sector.

www.kunstplaza.de

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