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VoltTunisia

The national electric vehicle companion for Tunisia, built around the tariff and tax rules drivers actually face.

All work

Tunisia's progressive electricity tariff, four tiersA step chart of four rising tiers. Each tier is taller than the one before it, so the rate per kilowatt hour increases as the household's monthly consumption grows. The first three tiers have a fixed upper bound. The fourth is drawn without a right hand edge because it is unlimited, which is the edge case the product encodes rather than approximating it with a large number. The vertical axis is the rate per kilowatt hour and the horizontal axis is consumption over the month.rateconsumption over the monthtier 1tier 2tier 3tier 4unlimited
~/architecture The cost of a charge follows the month's total consumption, not a flat rate. The top tier is unbounded, and is encoded as such.
Specification: VoltTunisia
RoleDesigner and engineer
Period2026
StackTypeScript, React, Postgres

Buying an electric car in Tunisia means answering questions the international comparison sites cannot. What does a charge actually cost on the national tariff. Does the VAT exemption apply to this model. Is there a charger between here and Sfax, and will it be open.

VoltTunisia answers those questions with the real rules rather than generic approximations.

The domain is the hard part

Electricity is billed on a progressive national tariff with four tiers, so the cost of a charge depends on total household consumption that month, not on a flat rate per kilowatt hour. Electric vehicles are VAT exempt, which changes the comparison against a petrol equivalent. Both rules are encoded directly, with the unlimited top tier handled as a genuine edge case rather than a large number.

The catalog scores vehicles for local conditions instead of reprinting manufacturer range figures. The charging map records access policy, because a charger that exists but requires a phone call is not the same as a public one.

Arabic first

The interface is built Arabic first, with French and English secondary. That is a structural decision, not a translation pass. Layout, iconography and numeric formatting all follow from it.

How it is built

React and TypeScript throughout, a Postgres data layer, map rendering over vector tiles, and collectors that keep vehicle and charger data current. The product is specification driven: behaviour is written down before it is built, and the end to end suite tests against those specifications.