Solar Powering Your Cyber Lab — Is the ROI Worth It?

Why I Started This Project

The primary purpose of my solar system was to provide emergency backup power for critical systems in my home. However, I did not want that capacity to sit idle during normal operation.

So I started experimenting with using that same infrastructure to power my cybersecurity lab and determine whether the return on investment could be realized sooner.

What began as a backup power project quickly turned into something much more interesting: a mix of infrastructure engineering, energy planning, operational resilience, and lab optimization.

The Goal

My lab currently consists of eight HP ProDesk Mini systems:

• Four dedicated to the Solo Purple Teaming lab
• Four dedicated to malware analysis and research

The goal was not to run my entire house from solar. The goal was much more practical: reduce the operational cost of a continuously running cybersecurity lab while gaining experience with power management, battery systems, redundancy, and energy planning.

In many ways, it felt similar to building a cybersecurity lab itself. You are constantly balancing cost, scalability, redundancy, efficiency, and operational visibility.

Current Lab Power Usage

One of the biggest surprises was how efficient modern mini-PC based labs can be.

Component	Estimated Draw
8 HP ProDesk Mini PCs	~80–140W combined
Networking Equipment	~20–40W
Storage / Misc Devices	~20–50W
Total Estimated Continuous Draw	~100–200W

Under typical workloads, the lab averages roughly 100 watts continuously, with occasional spikes depending on virtualization workloads, malware detonation, telemetry collection, and analysis activity.

That low baseline power consumption is what made the idea of solar offsetting realistic in the first place.

The Solar Setup

The setup centers around an EcoFlow DELTA 3 Ultra Plus paired with Renogy 200W bifacial N-Type solar panels. The objective is not complete off-grid operation. The objective is to offset baseline lab usage while preserving emergency backup capacity.

My original setup included:

• 1 × EcoFlow DELTA 3 Ultra Plus
• 2 × Renogy 200W bifacial N-Type solar panels
• Dedicated lab power isolation
• Controlled battery reserve for emergency power
• Scalable future expansion capability

The First Mistake: 400 Watts Was Not Enough

My first major mistake was underestimating the required solar input.

I started with only 400 watts of solar generation. On paper, that sounded reasonable for a lab averaging roughly 100 watts of continuous usage.

In practice, it quickly became clear that 400 watts would not sustain the lab without supplemental AC input from the grid, especially on cloudy days or during periods of reduced sunlight.

The lesson was simple: average load is only one part of the equation. Solar availability, weather, daylight hours, and battery reserve strategy matter just as much.

The Second Constraint: Battery Capacity

At roughly 100 watts of continuous draw, the lab consumes approximately:

100W × 24 hours = 2400Wh
2400Wh = 2.4kWh per day

That adds up quickly in a 24/7 environment.

To preserve emergency backup power and avoid fully cycling the battery, I configured the system with:

• A 20% reserved battery floor
• A 90% maximum charge limit

Those settings are useful for emergency preparedness and battery longevity, but they also reduce the amount of usable energy available for daily lab operation.

In other words, the theoretical battery capacity and the practical usable capacity are very different numbers.

The Third Constraint: Solar Input Limits

Another realization was that the EcoFlow DELTA 3 Ultra Plus has a maximum solar input of 1600 watts.

That creates another design constraint. Scaling the system is not as simple as adding panels forever. At some point, the power station itself becomes the bottleneck.

Even if I add more panel capacity, the system still has an upper limit on how much solar input it can accept. That matters when trying to maintain battery charge during poor production windows.

Winter Changes the Math

Summer solar production may offset a significant portion of the lab’s baseline usage, but winter is a different problem.

Shorter daylight hours, cloud cover, snow, lower sun angle, and reduced production windows all make continuous solar operation more difficult.

Because of that, I suspect winter days will still require supplemental AC power from the grid to keep the lab running consistently.

That realization changed the project from “Can I fully run the lab on solar?” to “Can I build a hybrid power model that reduces grid dependency, improves resilience, and keeps critical lab infrastructure online longer?”

The Expansion

Because of these constraints, I expanded the system.

The updated setup adds:

• 1 × 2kWh expansion battery
• 2 additional Renogy 200W bifacial N-Type solar panels

This brings the solar array from 400 watts to 800 watts and increases available storage capacity.

The additional battery helps address overnight runtime and cloudy-day resilience. The additional panels help improve charging consistency during limited production windows.

Even with the expansion, the system still operates within practical constraints. The maximum solar input limit, winter production challenges, reserve capacity requirements, and continuous lab load all still matter.

The challenge is not simply generating enough power during ideal conditions. The challenge is maintaining consistent operational sustainability across changing environmental conditions while preserving emergency reserve capacity.

So… Is the ROI Worth It?

Financially? Probably not quickly.

Small-scale solar systems can take a long time to recover their initial cost, especially when powering efficient systems like HP ProDesk Minis. These systems consume far less power than traditional rack servers or gaming-class hardware.

But financial ROI is only part of the equation.

The real value comes from operational resilience, infrastructure experience, energy independence, and the ability to keep critical systems online during outages.

Financial ROI

Savings exist, but the recovery timeline depends heavily on electricity prices, hardware costs, battery capacity, solar conditions, and how much of the system is used beyond the lab.

For a low-power lab, the direct financial return alone may not justify the investment.

Operational Resilience

This is where the value proposition changes.

The ability to maintain analysis systems, networking equipment, virtualization infrastructure, and research environments during outages has real value.

For malware analysis and security research environments, controlled uptime and isolation can matter more than pure cost savings.

The Learning Experience

One of the most valuable parts of this project has been the infrastructure experience itself.

Designing a power-efficient cybersecurity lab forces you to think about:

• Power budgeting
• Battery capacity
• Reserve planning
• Redundancy
• Operational continuity
• Capacity forecasting
• Infrastructure scalability

These are the same types of architectural considerations that appear in enterprise infrastructure, just applied at home-lab scale.

Where This Goes Next

The long-term goal is to continue expanding both the cybersecurity lab and the supporting power infrastructure.

Future plans include:

• Dedicated AI analysis systems
• Additional telemetry collection infrastructure
• Expanded virtualization clusters
• Higher solar input capacity
• Smarter battery automation and monitoring
• Improved infrastructure isolation

Cybersecurity labs are becoming increasingly power hungry. As AI workloads, telemetry pipelines, malware analysis systems, and virtualization environments grow, power planning becomes part of the architecture discussion.

Final Thoughts

If your only goal is saving money, solar powering a cybersecurity lab may not provide a fast return on investment.

But if you value resilience, experimentation, infrastructure experience, and the ability to operate more independently, the equation changes quite a bit.

In many ways, building solar infrastructure feels a lot like building a cybersecurity lab itself.

You are investing in capability, flexibility, scalability, and long-term operational control.