What is a solar power generator?
The Volta Solar Generator is a mobile power supply that can sustainably power your site. Our solar generators are 1:1 replacements for conventional diesel generators. They are at least as reliable as an old-fashioned diesel generator and comparable in terms of price. This makes the Volta solar power generator the sustainable solution for your construction site, event or temporary energy supply!
Why is a solar generator more sustainable and reliable?
Our Volta solar generators are more durable and reliable than a conventional diesel generator. And often for less or similar costs. A Solar Generator handles conditions much more efficiently. How exactly does that work? We explain.
Generating free energy
All the solar energy generated from the Solar Generator is free. Of course, we have invested in solar panels and batteries, but all the energy generated from this is immediately available for free. Especially in the spring and summer months, the Volta Solar Generators meet the customer’s energy demand. In winter, there is less sun, so the solar generators can supply less energy. Backup is therefore used more often in the winter months.
The big difference with an old-fashioned diesel generator is that the Volta Solar Generator can always generate energy efficiently. A diesel generator delivers its maximum efficiency at 75 to 100 per cent of its maximum power. It must therefore run close to full load to use fuel efficiently. A diesel genset is often loaded between 10 and 25 per cent. With this low load, the efficiency of the diesel genset is also a lot lower. In fact, below 25%, the fuel consumption of an old-fashioned genset hardly decreases. As a result, a diesel genset at 10% power uses almost as much as at 25% power. Only at 50% power does the efficiency of a diesel genset improve. At Volta Energy, we think this is an eternal waste! At low power, the diesel genset consumes unnecessary fuel and you therefore pay too much for the energy it needs.
Better at low power
On several construction sites using our Solar Generators, the efficiency is higher than a diesel genset. For a 15kVA diesel generator, the consumption at about 80% load is 3 litres of biodiesel per hour. This means 12 kWh is generated in one hour (4 kWh per litre). A 15 kVA diesel genset has similar efficiency to a solar genset at 80% load. If we zoom in on the use of a construction site, we see that a genset runs at 20% power on average. The lower the power, the more diesel an old-fashioned genset uses. This makes a diesel genset more expensive when not running at full load.
In practice, we see many situations where a genset’s load is even below 15%. Most construction sites run 24/7, for example because a camera installation needs to keep working. Often with minimal power. This means that a diesel generator needs to run 168 hours per week. Here, a diesel generator uses more than 200 litres for little electrical energy. We think that’s a waste, of course!
With a solar generator, you don’t have these losses. Efficiency is the biggest reason why the Volta solar generator is more durable, reliable and, above all, increasingly affordable. Choose your model and get a quote.
For the technicians
Curious about how our gensets are constructed? We take apart the 15 kVA model for you! This solar genset consists of:
- Solar panels for 2.6 kWp of power
- 29 kWh battery capacity
- 15 kVA inverters (12 kW)
Solar panels typically generate more than they consume. In fact, our data shows that, on average, a genset is used only 15%. This means that, on average, only 1.8 kW is generated from a 15 kVA genset.
The solar panels work even on cloudy or rainy days. Of course, a 15 kVA generator must also be able to peak to, say, 11 kW. The solar panels cannot deliver this one-on-one. At that point, the batteries are used to absorb this peak. In total, there is about 2 hours of battery capacity in our solar generators. That means the batteries can handle 2 hours of peak load. In practice, this usually means 2 working days of power supply without having to recharge via solar panels. *
The back-up genset can be used to charge the batteries or provide power directly when needed. Any capacity that is not taken directly is used to charge the batteries. So our backup genset is always fully deployed, whenever it is needed. This gives it a much higher efficiency than a genset that is not fully used. Our gensets also comply with the latest emission standards (Stage 5/Euro 6 for the 15 kVA solar genset).
*15% of 15 kVA is 1.8 kW. 29 kWh / 1.8 kW is 16.1 hours
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