Guide
Battery storage wins on most measures that matter to a temporary site. It does not win on all of them, and it is worth being clear about which.
A generator converts fuel into electricity continuously. A battery holds a fixed amount of electricity and releases it. So a generator's limit is fuel supply, and a battery's limit is stored energy — which means the honest comparison is not 'battery versus generator' but 'battery plus recharge arrangement versus generator plus fuel arrangement'.
| Measure | Diesel generator | Battery energy storage |
|---|---|---|
| Noise | 65–85 dB | Silent |
| Emissions at point of use | Exhaust and carbon monoxide | None |
| Indoor and enclosed use | Not permitted | Safe |
| Efficiency at low load | Poor; wet stacking risk | Unaffected by load level |
| Runtime | As long as fuel is supplied | Fixed per charge, extended by recharge or solar |
| Start-up | Warm-up required | Instant, full power |
| Maintenance | Oil, filters, scheduled service | Near zero |
| Fuel logistics | Deliveries, storage, spill plan | None |
| Purchase price | Lower | Higher |
| Running cost | Fuel, labour, servicing | Electricity to recharge, or none with solar |
| Service life | Rebuild cycles | 6,000+ cycles, 10+ year warranty |
Very long, very high continuous loads with no recharge window. If a site pulls hundreds of kW around the clock for months with nothing to recharge from, no practical battery covers it alone.
Lowest capital cost. A generator of equivalent power rating costs less to buy. The comparison only reverses once you add fuel, labour, servicing and compliance across a deployment.
Unpredictable, unlimited duration. Where nobody can say how long power will be needed and fuel supply is reliable, a generator's open-ended runtime is genuinely valuable.
Noise-constrained sites, indoor and enclosed work, anywhere carbon monoxide is a hazard, sites with poor fuel access, and — most commonly — any site where average load sits far below the peak the generator was sized for. That last category covers most construction compounds, events and film units.
A hybrid system puts the battery in front of the generator. The battery carries the load; the generator starts only to recharge it and then shuts down. You keep the generator's unlimited duration and the battery's silence, efficiency and responsiveness, while generator runtime — and therefore fuel, servicing and noise — falls sharply.
For most sites that are currently running a diesel set at low average load, the hybrid is the lowest-risk first step. See diesel generator alternative.
Questions answered
On purchase price, no. Over a deployment, usually yes, because there is no fuel, no refuelling labour, no scheduled engine servicing and no spill or noise compliance cost. The longer the deployment and the lower the average load, the stronger the battery case.
For most temporary power profiles, yes — silent, emission-free at the point of use, safe indoors and nearly maintenance-free. Diesel still wins on very large continuous loads over long periods with no recharge window.
Yes, and that hybrid arrangement is often the best answer. The battery carries the load and the generator runs only to recharge it, cutting generator hours without losing capacity.
Get in touch
Tell us the site, the load and the runtime you need. Our Austin engineering team comes back with a configuration, a runtime estimate and a price.
+1 512-316-7347
info@pulsar.industries
WhatsApp +1 512-585-8293
