Panels & batteries
Find quantities and connections for your project.
Solar system design
Your energy needs.
Your solar design.
Enter your loads and component specifications. Size panels and batteries, compare configurations, and keep your project results in a clear report.
For desktop and mobileWindows + Android
Cost comparison
Compare configurations within your chosen constraints.
PDF reports
Save inputs and results to revisit or share.
Explore MySun
A clear view at every step.
From specifications to comparisons and a saved report. Explore the windows you will work with.
Inside MySun
Start with your specifications.
Bring your load, inverter, battery, panel and environmental settings together in one window.
- Load and usage hours
- Component voltages and efficiencies
- Peak sun hours and losses
Inside MySun
Compare the options you have.
Enter component specifications and prices, then set your energy coverage, charging coverage and available area.
- Component prices and specifications
- Custom components in S+
- Area and coverage constraints
Inside MySun
Understand the configuration.
Review component counts and series/parallel connections, together with energy and charging coverage factors.
- Panel and battery configuration
- Series and parallel connections
- Energy and charging coverage
Inside MySun
Keep a project reference.
Export your inputs, constraints and results in one report to revisit later or share with your team.
- Input summary
- Calculated configuration and cost
- Report creation date
Screenshots show examples. Results depend on the inputs you provide.
Inside the lowest-cost window
Set the conditions. Then compare costs.
Available area, load coverage and battery charging determine which configurations qualify. Explore all five tools and learn how each one works.
MySun S / S+
Set the area available for panels.
The area limit excludes configurations whose calculated panel area exceeds the space you specify.
- Choose “Do not apply an area limit” to compare without an area constraint.
- Or apply the limit and enter the available area and the area of one panel in m². Both values must be greater than zero.
- Used area equals panel count multiplied by the panel area you enter. Update this value when comparing panels with different dimensions.
Worked example
With 20 m² available and 2 m² per panel, the area limit permits at most 10 panels. Coverage and electrical connection requirements must also be met.
This is a total panel-area check; it does not model geometric layout or spacing for shadows.
From the app — select an image to enlarge it.
MySun S / S+
Control how much load energy is covered.
This factor compares the energy batteries deliver to the load with the energy the load needs over your entered usage hours.
How is the factor calculated?
Energy delivered to the load ÷ required load energy
- Choose “Require coverage ≥ 1” to accept configurations that cover at least 100% of the required load energy.
- Or specify an interval: the minimum must be greater than zero and the maximum must exceed the minimum.
- A factor of 1 means 100%; 1.2 means 120%. Allowing values below 1 permits partial load coverage.
Worked example
For a 4.4 kWh load, an interval of 1 to 1.2 accepts delivered energy from 4.4 to 5.28 kWh, provided the other conditions are met.
Delivered energy in this calculation uses the battery energy available at the specified depth of discharge (DOD), then applies inverter efficiency.
From the app — select an image to enlarge it.
MySun S / S+
Set the battery charging coverage.
This factor compares calculated solar energy after environmental and electrical efficiency factors with battery energy available at the specified depth of discharge (DOD).
How is the factor calculated?
Effective solar energy ÷ available battery energy
- Choose “Require coverage ≥ 1” so calculated solar energy is at least equal to available battery energy.
- Or enter a custom minimum of 1 or greater.
- Raising the minimum increases the solar energy requirement and may require more panels, area and cost.
Worked example
For 5 kWh of available battery energy, a minimum factor of 1.2 requires at least 6 kWh of effective solar energy.
Energy coverage measures how well the load is supplied; charging coverage compares solar production with available battery energy.
From the app — select an image to enlarge it.
MySun S+
Add a custom battery capacity.
Use “Add Custom Battery” to include another capacity in the comparison, then complete its specifications in the table.
- Select the add button below the battery list to open the capacity dialog.
- Enter a positive whole-number capacity in ampere-hours (Ah), then select “Add”.
- Complete the new row with battery voltage, available DOD and unit price. Keep its checkbox selected to include it in the comparison.
Enter DOD as a value greater than zero and at most 1: for example, 0.8 means 80%. Adding an existing capacity does not create a duplicate row.
The × button removes a row. “Restore Defaults” brings back missing default capacities while retaining custom rows and existing entries.
View the battery table and fields to complete
From the app — select an image to enlarge it.
MySun S+
Add a custom solar panel rating.
Use “Add Custom Panel” to include another power rating in the comparison, then complete the panel specifications and price.
- Select the add button below the panel list to open the power-rating dialog.
- Enter a positive whole-number Pmax rating in watts (W), then select “Add”.
- Complete the new row with the voltage at maximum power (Vmp) and unit price. Keep its checkbox selected to include it in the comparison.
Adding an existing power rating does not create a duplicate row. Only checked rows with complete required values are compared.
The × button removes a row. “Restore Defaults” brings back missing default ratings while retaining custom rows and existing entries.
View the panel table and fields to complete
From the app — select an image to enlarge it.
Getting started
Three steps to begin.
Enter project inputs
Set your load, usage hours and component specifications.
Review the calculations
Compare minimum and maximum results, or use lowest cost in supported editions.
Save your results
Export a PDF with the inputs and results you want to keep.
MySun editions
Choose the tools you need.
Start with system sizing in BASIC. Add cost comparison or custom component types to suit your work.
System sizing
Calculate system components and review the results.
DownloadWith cost comparison
Find the lowest cost using the listed component types.
DownloadWith custom components
Add panels and batteries to match the options available to you.
Download| Feature | BASIC | S | S+ |
|---|---|---|---|
| Panel and battery sizing | Included | Included | Included |
| Results and PDF export | Included | Included | Included |
| Lowest-cost calculation | Not included | Included | Included |
| Area, energy and charging controls | Not included | Included | Included |
| Add panel and battery types | Not included | Not included | Included |
S was previously Premium; S+ was Ultimate.
Downloads
MySun on your device.
Choose your operating system, then the edition that fits your work.
Windows
Desktop editions
- MySun BASICSystem sizingDownloadMSI
- MySun SWith cost comparisonDownloadMSI
- MySun S+With custom componentsDownloadMSI
Currently available Windows installers. The interface may vary with the installed release.
Android
Mobile edition
MySun S+
The Android APK includes lowest-cost calculation and custom panel and battery types.
The app supports Arabic, English, French and Russian
Download Android APKFor help with activation or choosing an edition, contact us.
Help choosing an editionQuick help
Before you begin.
How do BASIC, S and S+ differ?
BASIC provides system sizing and results. S adds lowest-cost calculation using the listed component types. S+ also lets you add other panel and battery types.
What inputs do I need?
Prepare your load power and usage hours, inverter, battery and panel specifications, peak sun hours and environmental factors. For cost comparison, also enter component prices and the required constraints.
Can I save and share results?
Yes. Export your inputs and results as a PDF. The report shows the selected data and its creation date.
How do I get help with activation?
Write to the support address below with your operating system, edition and any error message you see.