TERAWATT · solar · storage · software

Your power bill keeps climbing. We make it a number you control.

We read your bill and find what you're overpaying. We fix it with solar power and batteries. Then our software tracks every rand you save. One South African team designs, builds and runs it all.

HOME · 01 · The reframe

Your power bill is not a fixed cost. It can be managed down.

Electricity prices rise faster than inflation every year. A big share of your bill can be won back — once someone actually reads it. We start by showing you exactly where the money goes.

+12.74%Tariff increase · Apr 2025
~8.76%Eskom-direct · Apr 2026
#1Driver — above-inflation tariffs
30–75%Typical total bill cut · illustrative
Your bill is set by your worst 30 minutes of the month, on a tariff you probably didn't choose, with errors nobody checks. That's not a fixed cost. That's money you can claim back.
HOME · 02 · How it works

Find the overpay. Solve it. Prove the saving.

Every project follows the same three steps. Software finds the problem in your bill. Hardware fixes it on your site. Then software proves the saving, rand by rand.

01 · Find Find
EnergyCloud

Upload one bill. Our AI checks every charge and finds where you're overpaying — in about 30 seconds, in plain rands.

02 · Solve Solve
SolarPeak

Solar makes your own power for less than the grid charges. Peak batteries cut the costly spikes in your usage. One team builds and runs both.

03 · Prove Prove
EnergyCloud

Every saving is tracked against your budget, and you get an alert if something looks wrong. A board-ready report lands every month — automatically.

HOME · 04 · Start free

Upload one bill. See your saving in plain Rands.

The fastest way to start. Our AI reads your bill, works out your tariff and shows where the money goes — then grades your site. Free. No follow-up unless you ask.

Drop a bill here
PDF or a phone photo. Whole bill or just the summary page. Any South African utility.
PDF · JPG · PNG · up to 10 MB
  • Free — no follow-up unless you ask.
  • POPIA-compliant — bill processed in South Africa only.
  • Megaflex, NightSave, Miniflex, municipal — PDF, JPG or CSV.
  • You keep the report. If we're not the right fit, take it to whoever is.
HOME · 05 · Why Terawatt

Not a broker. The team that operates it.

Most providers sell you one product and hand the rest to someone else. We design, build, help finance and run the whole thing — then prove what it saved.

01

One team, end to end

We design, commission and operate. Accountability lives in one place — no vendor hand-offs, no finger-pointing on a live plant.

02

Any way you want to pay

Buy it outright, pay per unit of power, or rent. We work with all four major SA banks. You pick what fits your books.

03

We handle the red tape

We handle the registrations and sign-offs — Eskom, NERSA and your municipality — so you don't have to.

04

Proof, not promises

We track the savings we find and the savings we capture, in rands. Real ROI — not a dashboard of kilowatt-hours.

05

SA-native & credentialed

We live in South African tariffs every day — Eskom and municipal. NERSA-registered, B-BBEE Level 2, based in Durban.

06

Free, low-risk on-ramp

Start with a free bill audit, processed safely in South Africa. No follow-up unless you ask. You keep the report either way.

HOME · 06 · Proof

We audit the bill — not just the meter.

The example below combines typical projects — it is not one single site. It shows solar, batteries and a bill audit working together. Real per-site figures are shared under NDA.

Monthly bill · before vs after · illustrative BeforeAfter
Energy charge
−60%
Demand (NMD/kVA)
−41%
TOU peak
−38%
Network & fixed
−4%
Billing errors
recovered
Total monthly billR 3.20MR 1.46M
Where the saving comes from
S

Solar generation

Cheaper self-generated power erases most of the energy charge.

P

Peak shaving & demand right-sizing

Battery flattens the peaks that drive the NMD/kVA penalty.

C

Tariff fit & TOU shift

The right tariff, plus load moved out of the expensive window.

C

Recovered billing errors

Overcharges caught in the audit and disputed back.

30–75%Total bill cut
One teamDesign → operate
TrackedSaving to the rand
HOME · 07 · Start with a bill

Your bill, audited by AI. Your savings, tracked to the rand.

Upload a recent bill and see your analysis in about 30 seconds — what you're overpaying, and what to do about it. Or talk to an engineer. We reply within one business day, with no sales pitch.

Phone087 550 1531
WhatsApp+27 76 778 2434
Emailhello@terawatt.co.za
Based inDurban
Get your free report
Instant AI analysis · POPIA-compliant · Bill processed in ZA only
Instant AI analysis · free · POPIA-compliantUpload one bill — see your saving in plain Rands.
Upload a bill