To determine the correct size of the chosen PV system according to the estimated energy needs, expert installers often use dedicated software programs, generically called “PV sizing calculators”. But how useful are they?
These calculators take into account several crucial parameters such as:
- Average annual electricity consumption of the beneficiary (based on number of people, equipment, etc.)
- Location and type of panel mounting
- Technological efficiency of the modules and cells used
- Specific solar radiation for the location and annual period concerned
- Possible losses in the process of converting solar energy into electricity
- Desired storage capacity (batteries, self-consumption vs sale of surplus)
Computers generate accurately, providing the optimal system size that ensures full or partial coverage of the annual consumption, depending on the user’s needs. The use of calculators avoids oversizing the system and significantly reduces investment and maintenance costs, being a very useful specialized tool in the professional design of photovoltaic installations.
Those interested in installing a photovoltaic system can use online sizing calculators to make a preliminary estimate of both the approximate size and cost. The procedure is simple:
- You enter location data, average monthly/annual consumption, etc.
- The program will estimate the number of panels and the total capacity needed to cover part/all of the consumption.
- You make an indicative selection of the equipment making up the system from the companies’ offers. Based on their technical data, the computers automatically estimate the costs of each component.
- You add any additional costs for the mounting structure, wiring, labor, etc.
- The result is a first estimate of the total investment for the sized system, providing a basis for negotiation with the installer.
Estimates do not take the place of final bids, but give an idea of the size and budget required. This preliminary approach favors both beneficiaries and installers by identifying the most suitable design and approximate costs at the outset.
So PV sizing calculators can be a good ally in the hands of a professional. If you need one, call the team Restart Energy!
