Comparison

Solar Panel Calculator Plus vs Solarark Projects

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

Solarark Projects

Features
Read full description

Solarark Projects is a Solar PV app. Solarark Projects helps you to work and manage your technical and sales requirement wherever you are. Solarark Projects is a marketplace and a common platform that connects Consumers, PV Installers, DisComs and State Nodal Agencies. Solarark Projects app allows user to: 1. Create Solar PV (SPV) Design (Map based UI to calculate the size of the SPV system that can be installed) 2. Calculate Savings and Payback of investment 3. Get verified Solar PV Installers and quotes 4. Financial Analysis 5. Generate techno-commercial report 6. Manage solar sales with mobile, fast and colourful project management system The Solarark Projects App changes the way end customers and rooftop solar professionals work. Highlights and features of the app for Solar Professionals are listed below: 1. Lead Management 2. Financial analysis and tools to get cash flow, break-even analysis etc. 3. Use standard terms and conditions for your proposal 4. Energy output calculation 5. Customer proposal template in a customized form 6. Email a quote to your client right from your device within minutes of using this app 7. Project management via cloud technology to monitor the progress of the lead/project 8. Increase conversions with quick, detailed and professional offers Design and manage your sales with your smartphone or tablet wherever you are. Increase your work performance and make it more professional using Solarark Projects Solar Platform.

Screenshots

Solar Panel Calculator Plus4 screens
Solarark Projects4 screens

Verdict

The call

The clearest difference is price: Solarark Projects at Free against Solar Panel Calculator Plus's $2.99. Solarark Projects also leads on update cadence (fortnightly vs every 47 months). On ads, in-app purchases, 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

Solarark Projects is free to download; Solar Panel Calculator Plus costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Solar Panel Calculator Plus ships an update every 47 months, Solarark Projects fortnightly. The most recent releases landed on October 13, 2026 and October 14, 2026 respectively.

Scorecard2 real differences · 8 level
Solar Panel Calculator Plus versus Solarark Projects: the parameters behind the verdict, then further details
ParameterSolar Panel Calculator PlusSolarark Projects
Price$2.99Free — better
Rating3.3 (23 ratings) — better—
Positive reviews25.0% of reviews—
Number of ratings23 — better—
Update frequencyEvery 47 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better13.4
Further details — not scored
Size8 MB57 MB
Age rating4+4+
DeveloperNitrioAHASOLAR TECHNOLOGIES LIMITED

In-app purchases

None

Solar Panel Calculator Plus

No in-app purchases

None

Solarark Projects

No in-app purchases

Questions

Is Solar Panel Calculator Plus free?
Solar Panel Calculator Plus costs $2.99, with no in-app purchases.
Is Solarark Projects free?
Solarark Projects is free to download, with no in-app purchases.
Do Solar Panel Calculator Plus or Solarark Projects have ads?
Neither Solar Panel Calculator Plus nor Solarark Projects shows ads.
Which is updated more often, Solar Panel Calculator Plus or Solarark Projects?
Solar Panel Calculator Plus ships an update every 47 months, and Solarark Projects fortnightly. Most recently, Solar Panel Calculator Plus was updated on October 13, 2026 and Solarark Projects on October 14, 2026.

Other comparisons