Purmars Construction Battery Systems: Product Lineup & Practical Solutions

Introduction: From Sizing to Deployment – Your Construction Site Energy Storage Solution

Having understood why construction sites need to transition to battery power and how to calculate power requirements, the next step is choosing the right product and understanding its real operational value.

Purmars offers a range of battery systems designed specifically for construction and heavy-duty applications. Built with rugged LiFePO₄ (lithium iron phosphate) battery cells, these systems deliver the durability, safety, and performance that job sites demand. This article details Purmars product specifications, cost comparisons, charging options, and FAQs to help you make your final decision.

Purmars Construction-Grade Battery Systems Product Line

EP3000: Compact Power for Light-Duty Sites

Best for: Small renovation projects, service calls, light construction, and backup power for essential tools. The EP3000 can run a circular saw, drill, lighting, and small compressors, making it ideal for tradespeople working in occupied buildings where noise and emissions are major concerns.

Key features:

• 1× 10A 5-pin socket + 1× 16A industrial aviation socket

• LCD display showing battery level, output voltage, power, and fault codes

• Optional GPS module and 4G remote monitoring for 24/7 BMS oversight

• Retractable handle for easy transport

EP6000: Mid-Range Power for Active Job Sites

Best for: Active construction sites, roadwork, and projects requiring multiple tools simultaneously. With 5.5kW of continuous output, the EP6000 can run circular saws, compressors, welders, and site lighting simultaneously.

Key features:

• 1× 10A 5-pin socket + 1× 16A industrial aviation socket

• MPPT solar input for renewable charging (up to 5.5kW)

• LCD display with full status and fault reporting

• Retractable handle + heavy-duty wheels for site mobility

EP8000: High-Capacity Power for Demanding Applications

Best for: Heavy construction, tower crane auxiliary power, and sites with high surge demands. The EP8000's 15kW peak output can handle the startup surge of large compressors, welders, and heavy saws.

Key features:

• 1× 10A 5-pin socket + 1× 16A industrial aviation socket

• 15kW peak surge capacity for demanding motor starts

• Rugged construction with dual-wheel mobility

• Optional 4G remote monitoring and GPS tracking

• Semi-solid-state LiFePO₄ cells meeting puncture-level safety standards

AP Series: Industrial-Grade Three-Phase Power

For large-scale construction projects requiring three-phase power, Purmars offers the AP series:

AP18 (18kW Three-Phase Battery Power Station):

• 14,077 Wh capacity, 18kW three-phase output

• 380V/50Hz and 220V/50Hz outputs

• Ideal for heavy equipment, large welders, and multi-tool sites

AP30/AP42 (30-42kWh Mobile Battery Power Station):

• 30kW–42kWh capacity

• 380V 63A industrial socket + three 220V 16A sockets

• Seven battery packs with BMS and fire suppression

• IP54 rating, forced air cooling

• Charging via standard EV charging stations, 380V grid, or 220V grid

The Business Case: Cost Comparison

Diesel Generator vs. Battery Storage: 5-Year TCO

Key savings opportunities:

• 40–60% reduction in fuel and maintenance costs even without renewable energy

• 80–90% reduction when paired with solar or grid charging

• £69,000+ annual savings on similar construction sites

• 89% CO₂ reduction achieved in real-world hybrid deployments

Bottom line: While the upfront cost of battery systems remains higher than diesel generators, the total cost of ownership over 2–3 years often favors battery storage—especially when factoring in fuel price volatility, maintenance labor, and regulatory risks.

Off-Grid Charging Options: Keeping the Power Flowing

One concern contractors often raise is: "What happens when the battery runs out?"

Purmars systems offer multiple recharging pathways:

Grid charging: Simply plug into any standard AC outlet. EP3000 charges in ~5 hours; EP6000 and EP8000 charge in ~5-7 hours.

Solar charging (EP6000): The integrated MPPT controller accepts up to 5.5kW of solar input. In sunny conditions, this can significantly extend runtime or even eliminate the need for grid charging entirely.

EV charging stations (AP series): The AP30 and AP42 can be recharged using standard EV charging infrastructure—a huge advantage on sites where grid access is limited.

Generator hybrid: For extended off-grid operations, a small diesel generator can be used to recharge the battery system during low-demand periods, running at optimal efficiency rather than idling.

FAQ: Common Questions

Can a battery system really replace a diesel generator on a construction site?

Yes—for a growing range of applications. Battery systems are already powering tower cranes, site trailers, and entire construction sites with zero local emissions. For very high-load applications or extremely long runtimes, hybrid approaches (battery + smaller generator) are often the most cost-effective solution.

How long can a battery system run on a single charge?

Runtime depends entirely on load. A 5kWh system running 1kW of tools will last ~5 hours. Running 500W of lighting and equipment will last ~10 hours. For most construction applications, the EP6000 (5.1kWh) provides a full workday of power for moderate loads, while the EP8000 (7.1kWh) or AP series (14–42kWh) can run heavy loads for extended periods.

Is it safe to use battery systems indoors?

Yes. Unlike diesel generators, battery systems produce zero carbon monoxide or other emissions at the point of use. This makes them ideal for indoor renovations, basement work, tunnels, and other enclosed spaces where diesel generators are dangerous or impossible to use.

How do battery systems perform in extreme temperatures?

Purmars systems are rated for:

• Charging: 0°C to +45°C (EP series) / -20°C to +45°C (AP series)

• Discharging: -5°C to +50°C (EP series) / -20°C to +50°C (AP series)

• Storage: -20°C to +45°C (short-term) / -10°C to +35°C (long-term)

What about maintenance?

Battery systems require significantly less maintenance than diesel generators. The primary maintenance task is coolant replacement every 3–4 months. Remote monitoring allows diagnostics and troubleshooting without site visits.

Can I monitor my battery system remotely?

Yes. Purmars systems offer optional 4G/GPS modules for 24/7 remote monitoring of battery status, location, usage patterns, and fault alerts.

Conclusion: The Future of Site Power Is Electric

The construction industry is at an inflection point. Fuel prices are volatile, emissions regulations are tightening, and communities are increasingly intolerant of noise pollution. Battery energy storage systems address all of these challenges while delivering measurable cost savings.

From the compact EP3000 for light-duty work to the industrial-grade AP30 for heavy construction, Purmars offers a full range of construction-grade battery systems designed for the realities of the job site—rugged, reliable, and ready to work.

The diesel generator isn't going to disappear overnight. But the trend is clear: more contractors are making the switch, and those who do are cutting costs, reducing emissions, and gaining a competitive edge.

The question is no longer if battery power will replace diesel on construction sites. It's when—and for many projects, that time is now.

Purmars — Construction-Grade Battery Storage. Built for the job site. Engineered to last. Available for OEM/ODM partnerships worldwide.