Comparison

Solar Panel Calculator Plus vs My Solar Panel

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Solar Panel Calculator Plus

Calculate custom off-grid solar home power systems. Determine the exact number of solar panels and battery capacity needed for your energy usage. Helps plan system size, inverter requirements, and battery bank specifications.

Highlights
  • Calculate solar panel requirements
  • Determine battery capacity
  • Calculate inverter size
  • Estimate daily energy usage
  • Plan days of autonomy
  • Optimize battery life calculations
Features
Read full description

Solar Panel Calculator Plus calculate custom Off-Grid Solar Home Power Systems. Use these handy calculator to help decide which system size is right for you. You can calculate the Exact Number of Solar Panels You Need For Your Usage Plus the Space you need. Also include Battery Capacity for your Home Power Systems. Daily energy use: Find the energy used in a day. Figure out how long each electronic device will be run in hours during a day. Multiply the wattage of each device by its run-time to get the energy in watt-hours per day. Add up all the watt-hour values to get a total for your home. Example: Light bulbs run for 5 hours a day. Computer runs for 2 hours a day. 100 x 5 + 300 x 2 = 1100 watt-hours. Inverter size: To determine the inverter size we must find the peak load or maximum wattage of your home. This is found by adding up the wattage of the appliances and devices that could be run at the same time. Include everything from microwaves and lights to computers and clocks. The sum will tell you which inverter size you need. Example: A room has two 60 watt light bulb and a 300 watt desktop computer. The inverter size is 60 x 2 + 300 = 420 watts. Multiply with 1.2 or 1.5 into a safe area. Days of autonomy: Now decide how many days worth of energy you want to store in your battery bank. Generally this is anywhere from two to five. Battery bank capacity: Example: You want the battery bank to last three days without recharging and that you use 5.0 kwh per day. As 5.0 x 3 x 2 = 30.0kwh, this is the energy we need from the batteries. Converting this to AH we have to divide by the voltage of your system. This can be 12, 24 or 48 for commercial application. If we choose to use 48V, the minimum AH capacity is then 30 000/48 = 625 AH. Now if you divide by your battery's rating you find the number of batteries you must use. The larger the system you have, the higher the voltage you should have. It is normal to match a 12 V battery bank to a 400 W power system. A 5 kW system would work most appropriately with a 48 V wiring system, in order to decrease current flow in the wires. Note: All calculations assume only a 50% discharge to your batteries to optimize battery life. Note: Colder temperatures have a negative effect on the capacity of your battery bank. If your battery bank is always indoors in a heated area then you don't have a problem. But if they're stored in an unheated area during the winter then you'll need to account for this. Solar Panel: The most typical solar panel size used for residential installations is 65 inches by 39 inches. And the wattage output range from 200 - 330 watts. *Thanks for your support, stay tune for more update to come

About

My Solar Panel

Design and analyze solar photovoltaic systems on your smartphone. Get electricity generation estimates, payback periods, and detailed financial analyses for rooftop or commercial installations. Optimize your system for maximum output and make informed investment decisions.

Highlights
  • Design solar projects on mobile
  • Estimate electricity generation
  • Calculate payback period
  • Generate PDF reports
  • 3D panel simulator
  • Shading analysis
  • Financial analysis tools
Features
Read full description

Professional Solar Tool for any Solar Professional, DIY Enthusiast, PV Installer, PV Owner or Home Owner. You don't need PVsyst anymore. Install My Solar Panel and create your Projects from your smart phone. Design and print your Projects with our PDF option with your Company Logo! Suitable for any solar installation, rooftop PV, commercial Solar Photovoltaic Power Plants with all types of tracking options. Get the electricity generation from your desired PV with just one click. Check the payback period of your PV investment. Optimize your PV System and get maximum output from it. Please find below short description and a user manual of this user-friendly app, which is a pocket PVSyst software for fast estimations. If you are planning to invest in a Photovoltaic solar installation for your home or any other commercial and non-commercial use, you have the right tool to advise you on the feasibility of your desired solar power system. You will be able to get the best performance results for any desired location and configuration. This app will help you in the process of decision making for installation of a PV System. With My Solar Panel you will gain enormous flexibility for designing your photovoltaic panels and all other PV equipment. You can make your configuration according to your needs and set your PV system on any desired location on the map. * All in one app My Solar Panel is your assistant which offers you a various palette of parameters for any desired location on the map. It provides: - Annual electricity generation - Monthly electricity generation - Generation of unlimited PDF Reports - Tracking options (field type): fixed tilted plane, single axis horizontal tracking, single axis vertical tracking, dual axis tracking - Live 3D Panel Simulator: your phone is simulating a solar panel, rotate it to get what will be the real output from your solar panels, depending on the orientation - Shading model for PV plants: check the shadow angle, shading losses from the arrays and make an advanced optimization of your PV solar plant - Satellite maps, measuring azimuth on field and on map - Optimal tilt angles - Optimal orientation - Total area of all panels - Detailed financial analysis with cumulative cashflows for the solar PV plant lifetime - NPV, ROI, amortization - Payback period in years for your desired system - Capacity factor of your PV system - Energy degradation in 25-years period - Avoided CO2 emissions - Levelized cost of electricity (LCOE) - Energy yield - Optimization module * Easy to use - Simple and user-friendly interface. - Three steps approach: choose a location, configure your system, analyze the results. * Configuring your solar power system The model requires several input parameters in order to run the simulations. - Installed power of your PV System (panel power and number of panels) - Tilt angle of the panels - Orientation of the panels - Average electricity price of your bill or average electricity sell price (market, PPA, etc.) - solar power system cost in USD(your currency) per installed kW, including solar panel cost, solar power inverter cost and all other solar installation cost - Degradation rate of the solar panels * Optimize your results - Find out the optimal tilt angle and orientation for your PV System - Minimize your electricity losses * Get more than an app - Our goal is not only to help you find the best output for your PV System, but also to help you explore the possibility of the solar power as an unlimited source of energy and to encourage you in making a very minor impact on the climate change. - Whenever you need help for designing your PV System or interpretation of the data, please do not hesitate to contact us at support@pvdeveloper.com. Read the terms and conditions here: https://sites.google.com/view/pvfterms Read the privacy policy here: https://sites.google.com/view/iosmsp

Screenshots

Solar Panel Calculator Plus4 screens
My Solar Panel4 screens

Verdict

The call

The clearest difference is price: My Solar Panel at Free against Solar Panel Calculator Plus's $2.99. My Solar Panel also leads on rating (4.6 vs 3.3) and update cadence (every 2 months vs every 47 months). Solar Panel Calculator Plus's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

My Solar Panel is free to download; Solar Panel Calculator Plus costs $2.99 up front. My Solar Panel sells 2 in-app purchases, starting at $9.99 per month. Solar Panel Calculator Plus asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

My Solar Panel holds the better App Store score, 4.6 against 3.3. Both are backed by a comparable volume of ratings — 23 and 108 respectively. Written reviews point the same way: 25% of Solar Panel Calculator Plus's written reviews are positive against 33% of My Solar Panel's.

UpkeepUpdate frequency

Solar Panel Calculator Plus ships an update every 47 months, My Solar Panel every 2 months. The most recent releases landed on August 22, 2026 and August 16, 2026 respectively.

Scorecard8 real differences · 2 level
Solar Panel Calculator Plus versus My Solar Panel: the parameters behind the verdict, then further details
ParameterSolar Panel Calculator PlusMy Solar Panel
Price$2.99Free — better
Rating3.3 (23 ratings)4.6 (108 ratings) — better
Positive reviews25.0% of reviews33.3% of reviews — better
Number of ratings23108 — better
Update frequencyEvery 47 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better13.2
Further details — not scored
Size8 MB12 MB
Age rating4+4+
DeveloperNitrioIgor Ilijovski

Customer experience

Solar Panel Calculator Plus

All ratings23 ratings
Positive52.2%
Neutral4.3%
Negative43.5%
Written reviews4 reviews
Positive25.0%
Neutral25.0%
Negative50.0%

My Solar Panel

All ratings97 ratings
Positive87.6%
Neutral6.2%
Negative6.2%
Written reviews6 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

In-app purchases

None

Solar Panel Calculator Plus

No in-app purchases

2 purchases

My Solar Panel

Subscriptions2
  • Unlock all features$9.991 Month
  • Unlock all features$39.991 Year

Questions

Is Solar Panel Calculator Plus free?
Solar Panel Calculator Plus costs $2.99, with no in-app purchases.
Is My Solar Panel free?
My Solar Panel is free to download, with in-app purchases available.
Which has better reviews, Solar Panel Calculator Plus or My Solar Panel?
My Solar Panel is rated higher. Solar Panel Calculator Plus averages 3.3 out of 5 from 23 ratings, while My Solar Panel averages 4.6 from 108 ratings.
Do Solar Panel Calculator Plus or My Solar Panel have ads?
My Solar Panel shows ads; Solar Panel Calculator Plus does not.
Which is updated more often, Solar Panel Calculator Plus or My Solar Panel?
Solar Panel Calculator Plus ships an update every 47 months, and My Solar Panel every 2 months. Most recently, Solar Panel Calculator Plus was updated on August 22, 2026 and My Solar Panel on August 16, 2026.

Other comparisons