Zero Point Energy
Level 1 BBBEEAccredited Since 2015SAPVIA Certified

SLASH YOUR
ELECTRICITY BILL.
SEE YOUR ROI
IN SECONDS.

South Africa's most trusted commercial solar calculator. Enter your monthly bill and instantly discover your payback period, monthly savings, and 25-year returns — calibrated for Eskom's 12.74% annual tariff increases.

All values shown ex. VAT.

Commercial & Industrial
Up to R120,000/month savings
3–5 Year Payback
200+ Projects Delivered
Solar + BESS Solutions

YOUR SOLAR ROI CALCULATOR

Results update instantly — no email required to see your estimate.

All values ex. VAT.

YOUR DETAILS

R50 000/month
R5,000R500,000+
R3.50/kWh
R1.50 (Eskom direct)R5.50 (Municipal peak)

Capex rates ex. VAT. Rooftop is most cost-effective.

No email required. Results are estimates based on SA market averages. All values ex. VAT.

R38k

Estimated Monthly Savings

ex. VAT

1.6years

Payback Period

R67.0M

25-Year Total Savings

ex. VAT

133.7tons/year

CO₂ Reduction

Recommended System — All prices ex. VAT

99.5 kWp
Solar System
R995k
Total Capex
R726k
Net Investmentafter S12B
Section 12B saves you R269k in Year 1 (27% of total capex)

CUMULATIVE SAVINGS vs ESKOM COST (10 Years)

Assumes 12.74% annual Eskom tariff escalation. All values ex. VAT.

Y1Y2Y3Y4Y5Y6Y7Y8Y9Y10R0R3.0MR6.0MR9.0MR12.0M
  • Eskom Cost (Cumulative)
  • Solar Cost (Cumulative)
  • Your Savings

ANNUAL ELECTRICITY COST: WITH vs WITHOUT SOLAR

Annual cost comparison over 10 years. All values ex. VAT.

Y1Y2Y3Y4Y5Y6Y7Y8Y9Y10R0R450kR900kR1.4MR1.8M
  • Without Solar
  • With Solar

You purchase the system outright. You own the asset, claim Section 12B, and keep 100% of savings.

R995k
Total Capex
ex. VAT
R726k
Net After S12B
ex. VAT
1.6 yrs
Payback
cash purchase

Full Comparison (ex. VAT)

MetricCashLoanPPA
Upfront Capital RequiredR995kR0R0
Monthly Payment to ZPER0 (owned)R22kR28k
Month 1 Net Cash Flow+R38k/mo+R16k/mo+R10k/mo
Year 1 Net Cash FlowR450kR187kR118k
Payback Period1.6 yrs2.6 yrsDay 1 positive
25-Year Total ReturnR67.0MR65.9MR59.0M
Asset OwnershipYou own itYou own itZPE owns it
Section 12B BenefitYes (27% of capex)Yes (27% of capex)No (ZPE claims it)

GET YOUR DETAILED FINANCIAL MODEL

Receive a bankable PDF report with your exact ROI, financing options, Section 12B analysis, and a free site assessment from our engineers.

PDF is generated instantly in your browser. No email required. All values ex. VAT.

HOW THE CALCULATOR WORKS

01

Enter Your Bill

Input your average monthly electricity bill (ex. VAT) and slide to your current tariff rate. Choose your install type and whether to include battery storage.

02

See Instant Results

Your monthly savings, payback period, and 25-year projection update in real time. No email required to see your estimate.

03

Get Your Report

Request a detailed, bankable financial model from ZPE's engineers — including Section 12B analysis, BESS sizing, and financing options.

REAL RESULTS.
REAL SAVINGS.

ZPE's commercial mall grid-tie solar PV project in Tshwane delivers up to R120,000 in monthly electricity savings — with solar power feeding all operational electricity needs during sunlight hours.

R120,000
Monthly Savings
Grid-Tie Solar PV
System Type
Commercial Mall
Sector
Tshwane, SA
Location
ZPE Commercial Solar Installation

WHY CHOOSE ZERO POINT ENERGY

Level 1 BBBEE

Proudly South African with full BBBEE compliance for government and corporate procurement.

Fully Accredited

SAPVIA certified engineers and electricians. Professional workmanship guaranteed.

Since 2015

Over a decade of commercial and industrial solar installations across South Africa.

Major Clients

Trusted by leading commercial, industrial, and retail clients across multiple sectors.

FREQUENTLY ASKED QUESTIONS

How accurate is this calculator?
The calculator uses South African market averages and NERSA-approved tariff data. All values are ex. VAT. It provides a reliable estimate, but your actual ROI depends on your specific roof, tariff structure, and consumption profile. A ZPE site assessment provides bankable numbers.
What is Section 12B and how does it affect my ROI?
Section 12B of the Income Tax Act allows businesses to deduct 100% of the cost of qualifying solar and BESS assets in the year of installation. For a company taxed at 27%, this effectively reduces your net investment by 27% — dramatically improving your payback period.
What is the difference between rooftop, ground-mount, and carport solar?
Rooftop installations are the most cost-effective at R10,000/kWp ex. VAT, as they use existing structure. Ground-mount systems require civil works and come in at R13,000/kWp. Carport structures are the most expensive at R15,000/kWp but add covered parking value. All prices are indicative and ex. VAT.
Why should I consider adding battery storage (BESS)?
Battery Energy Storage Systems (BESS) are increasingly popular for C&I clients. They provide backup power during load-shedding, allow you to store excess solar energy for evening use, and can reduce peak demand charges. ZPE prices BESS at R5,500/kWh ex. VAT (batteries + battery inverters).
How does Eskom's tariff escalation affect my savings?
Eskom tariffs have increased by an average of 12.74% per year (2025/26 NERSA approval). Your solar system's cost stays fixed while Eskom costs compound annually — meaning your savings grow every year. This is why 25-year projections are so compelling.
Does ZPE offer financing options?
Yes. ZPE works with financing partners to offer solar loans, Power Purchase Agreements (PPAs), and lease structures. A PPA allows you to benefit from solar savings with zero upfront capital.

READY TO STOP OVERPAYING FOR ELECTRICITY?

Get your free site assessment and detailed financial model from ZPE's engineers. No obligation.