Solar Calculator
Use this solar calculator to estimate how much electricity your home uses each day and month. Enter your average monthly electricity spend and select your location in South Africa to get an instant usage estimate in kWh per day and per month.
This calculator helps you understand your real power needs before buying solar panels, batteries, or an inverter. By converting Rand spend into kWh usage, you get a clear view of how much energy your home consumes during normal use and load-shedding periods.
Your results give a practical starting point for solar system sizing. You can estimate how many solar panels you need, what inverter size suits your home, and how much battery storage you need for night-time or backup power. All calculations use South African sunlight averages and realistic efficiency assumptions.
This tool works best if you use an average monthly electricity amount over several months. Results are estimates and help with planning, budgeting, and comparing solar system options.
After viewing your results, request a tailored solar quote based on your usage, location, and backup needs. This helps match your home with the right solar solution, without overspending or undersizing your system.
Use Our Solar Calculator to Plan Your Solar Setup
Our solar calculator is the easiest way to design your solar system. It works as a powerful solar calculator and solar power estimator in one. With a few inputs, it helps you calculate solar panels, inverter size, and energy savings.
Why Choose Our Solar Calculator?
This solar calculator is made for South African energy needs. Whether you’re off-grid or battling load shedding, it delivers accurate results. Use it as a solar energy calculator, pv panel calculator, or solar electricity calculator.
You can calculate solar panels for homes or businesses within minutes. The solar calculator gives clear numbers without technical confusion. It’s fast, reliable, and tailored to local conditions.
Key Features of the Solar Power Estimator
- Sizing of solar panels using your average daily usage
- Accurate battery estimates for night-time use
- System design from a full solar power estimator
- Works as a solar energy estimator for backup planning
- Supports large systems with a solar array calculator
Who Is the Solar Calculator For?
This tool helps homeowners, small business owners, and solar installers. Use it as a photovoltaic panels calculator or a pv panels calculator depending on your system. It helps you calculate solar panels quickly and easily.
The solar calculator panel works 24/7 – no account needed. Let this solar calculator guide your journey to solar savings.
Sizing of Solar Panels & Power Estimator
Try our solar calculator to estimate your solar panel sizing, solar power needs & battery setup. Accurate for SA users. Includes solar calulator, solar panel calulator, solar electric calculator & solar pv calc tools. Get results for solar installation calculator or sun panel calculator needs.
Start Saving with the Solar Power Estimator
Use our solar power estimator to plan, budget, and install your solar system. With every click, you calculate solar panels accurately and instantly. This is more than a calculator – it’s your solar success partner.
INSTALLATION ADDRESS
SOLAR PANEL SIZING (24H BASE)
BATTERY SIZING FOR NIGHT USE
Frequently Asked Questions
1. Question: How does the solar calculator work out my kWh per day?
Answer: You enter your monthly electricity spend or monthly kWh. The calculator estimates your monthly kWh, then divides by the billing days to show kWh per day.
Tip: Use a 7 day average if you are unsure about your daily usage.
2. Question: How does the calculator convert my monthly electricity spend into kWh?
Answer: The calculator uses an estimated Rand per kWh value for your selected area. It divides your monthly spend by that value to estimate monthly kWh, then converts it to kWh per day.
Tip: Fixed charges, service fees, and block rates can change your real cost per kWh.
3. Question: Which electricity tariff does the calculator use?
Answer: It uses an estimated residential Rand per kWh linked to your selected location. Tariffs vary by municipality and supplier.
Tip: If your bill shows a Rand per kWh average, use that for better accuracy.
4. Question: Why does my result differ from my municipal bill or prepaid meter?
Answer: Bills and prepaid meters often include fixed fees, tiered block rates, VAT, and rounding. The calculator uses an average estimate, so results can differ from your statement.
Tip: If you know your monthly kWh, enter kWh instead of spend for a closer match.
5. Question: What does kWh per day mean for solar system sizing?
Answer: kWh per day is your daily energy use. Your panels must produce this energy in daylight. Your battery covers night use and backup time.
Tip: Higher night usage means a bigger battery, even if your daily kWh stays the same.
6. Question: How many solar panels suit my daily electricity usage?
Answer: The calculator uses your kWh per day, panel size (W), city sun hours, panel direction, tilt, and system losses to estimate required panels.
Tip: Shade and wrong direction increase the number of panels needed.
7. Question: What inverter size suits my household usage?
Answer: Inverter size depends on peak load, not daily kWh. Add the watts of appliances you run at the same time, then allow extra room for start-up loads.
Tip: Pumps, fridges, and aircons can have high start-up power.
8. Question: How much battery storage suits load shedding and night use?
Answer: Battery size depends on your night-time kWh, hours needed, DoD, and extra autonomy days. The calculator estimates total battery kWh and how many modules you need.
Tip: Use a 7 night average for night-time kWh for better sizing.