1. Inventory
Energy = quantity × power × duration × duty cycle.
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CORESOLAR
CORESOLAR turns information about your appliances, use and site into transparent, reproducible preliminary sizing subject to professional review.
Versioned calculator
The proposed values below are editable method-pack starting points, never normative requirements.
Every step retains units, value origin and engine version.
Energy = quantity × power × duration × duty cycle.
Design energy divided by resource and performance.
Covered energy, autonomy and displayed factors.
Continuous power and peak remain separate.
dailyEnergyWh = quantity × ratedPowerW × hoursPerDay × dutyCyclerequiredPvArrayPowerW = designDailyEnergyWh / (solarResourceHours × performanceRatio)requiredNominalStorageWh = requiredUsableStorageWh / (DoD × storageEfficiency × temperatureFactor)preliminaryDesignCurrentA = (actualPvArrayPowerW / systemVoltageV) × currentMarginNo PV series, cable size, protection or earthing.
References frame the professional next stage, not automatic certification.
Production and autonomy remain sensitive to site, use and actual products.
Official pages are cited without reproducing licensed standards or claiming compliance.
Official irradiation data and API service usable as an input resource, without a production guarantee.
View official sourceverified · publicPV array design requirements; the standard is not reproduced and no execution-design result is claimed.
View official sourceaccess-required · licensedRequirements for low-voltage PV electrical installations.
View official sourceaccess-required · licensedDocumentation, commissioning tests and inspection for grid-connected PV systems.
View official sourceaccess-required · licensedGeneral requirements and test methods for batteries used in off-grid PV systems.
View official sourceaccess-required · licensedA transparent web preliminary sizing tool, distinct from the future standalone CoreSolar application.
No. It must be checked against the site, products, temperatures and applicable rules.
Use a nameplate rating or manufacturer data you have verified.
The documented rated power for the appliance; no brand library fills it automatically.
The fraction of the operating time during which the appliance draws its entered power.
They can define the energy covered by storage when that mode is selected.
Installed power is summed only for rows marked as simultaneous.
Enter a documented starting power or multiplier; manufacturer data prevails.
The equivalent daily irradiation used as a calculation input, with its source and period.
From the official PVGIS service of the European Commission Joint Research Centre.
Yes, with a positive value, period and clearly identified source.
Required PV power is divided by unit panel power then rounded up to an integer.
Because the whole number of modules and actual array power change with this input.
Voltage sets the series count and required capacity sets the parallel string count.
This decision affects Ah, storage arrangement and current; it requires professional confirmation.
No. It remains indicative and depends on uses, temperatures, ageing and product data.
A visible margin multiplies simultaneous continuous power; the peak is shown separately.
The tool calculates battery-side current only; PV voltage, architecture and product data remain necessary.
They require validated architecture, modules, temperatures, lengths and installation rules.
Yes, locally through an explicit action, or in an account when Supabase and authentication are active.
Yes, with the browser Print / Save as PDF function.
You can request an assessment after consent; no price is generated automatically.
The report prepares the discussion; a professional validates site, products and execution.