TRISITI

Split your Sonelgaz bill fairly, in three simple steps.

Split a Sonelgaz electricity and gas bill fairly

TRISITI is a free online tool that splits one Sonelgaz (SADEG) bill between several homes, families or tenants who share a meter. Upload a photo of the bill, add the sub-meter readings and get everyone’s share in dinars, with tariff tranches and taxes handled correctly.

How it works

  1. Upload the bill

    A photo or PDF of the Sonelgaz bill. The tranches, amounts and taxes are read automatically, then verified with arithmetic checks.

  2. Add the people

    Each home with its sub-meter reading (old and new index), anyone who pays a fixed amount, and shared costs such as stair lighting or the water pump.

  3. Get each share

    Pick how each line is shared, then print the result or send it on WhatsApp, Messenger, Viber or email.

What TRISITI does

  • Reads the bill from a photo with AI (Google Gemini) or on the phone itself.
  • Splits electricity by tranche: every home gets an equal part of each tranche, at that tranche’s price.
  • Several rules: equal parts, by consumption, manual, one person, or by shares.
  • Fixed contributions (stairs, water pump, agreed amounts) and sharing of the remainder.
  • Prints on A4, A5 and 80 mm receipts, exports to Excel, saves the calculation to a file.
  • Arabic, French and English. Free, no account; your data stays in your browser.

How Sonelgaz tranches are shared

Residential Sonelgaz bills are quarterly and priced in tranches: the more you use, the more each kWh costs. When several homes share one meter, TRISITI gives each home an equal part of every tranche’s width at that tranche’s price, so a light user does not pay expensive tranches because of others. VAT is 9% on tranches 1 and 2, and 19% on tranches 3 and 4.

TrancheElectricity (kWh / quarter)DA / kWhGas (thermies / quarter)DA / thVAT
10–1251.77870–1 1250.16829%
2125–2504.17891 125–2 5000.32459%
3250–1 0004.8122 500–7 5000.402519%
4above 1 0005.4796above 7 5000.459919%

Default prices (DA before tax). Always check the prices printed on your bill; they can be changed in the app.

Frequently asked questions

What is TRISITI?

TRISITI is a free website that splits a Sonelgaz or SADEG electricity and gas bill between several homes, families or tenants who share a meter, with each share worked out to the centime.

How is electricity split by tranche between several homes?

Each home gets an equal part of every tranche’s width (with 4 homes, 31.25 kWh of tranche 1 each) at that tranche’s price; use beyond that is priced at the higher tranche. Everyone pays for what they really used.

Does it read the bill automatically?

Yes. Upload a photo or PDF and the tranches, amounts and taxes are read by Google Gemini (with your free key) or on your device. Checks then confirm the total matches the one printed on the bill.

Is TRISITI free? Do I need an account?

Completely free, no sign-up. Your work is kept in your browser and can be saved to a file to open on another phone.

Are my data and the bill photo stored?

The photo is not kept: it is only sent to be read when you use Gemini. The calculation, names and your Gemini key stay in your browser.

How do I add stair lighting, a water pump or someone who pays a fixed amount?

Add them as fixed contributions: an amount shared between the people you choose, or a fixed amount for one person. What is left goes to the bill holder or is shared the way you choose.

How do I send each person their share?

From the result: send on WhatsApp, Messenger, Viber or email, print on A4, A5 or an 80 mm receipt, or export to Excel.

Is TRISITI linked to Sonelgaz?

No. TRISITI is an independent tool, not affiliated with Sonelgaz or SADEG; the amount due is always the one printed on your bill.