What does an alternator actually do?
The alternator is a small generator that spins off your engine belt. It has two jobs: keep your battery charged while the engine runs, and power all your electrics (headlights, AC, radio, computers). If it stops, the car runs on battery alone for 20-40 minutes before everything cuts off. Most modern cars actually die faster than that because the fuel injectors and ECU are the first things to lose power.
How to know it's the alternator (and not the battery)
The two failures look almost identical from the driver's seat. Here's how to tell them apart:
- Battery warning light on: alternator is not charging. Could be the alternator itself, or the belt.
- Headlights bright when idling, dim when you rev: alternator is dying. Reverse (dim at idle, brighter at rev) is classic voltage drop.
- Car starts once, dies after a few minutes: alternator.
- Car won't start at all, everything dead: battery. Or the connection to the battery.
- Whining or grinding sound from engine bay: alternator bearings.
New, refurbished, or used?
The three tiers you'll be offered at Abossey Okai, honestly explained:
- Brand new (Bosch/Denso/Valeo) — GH₵ 2,000-4,500. Lasts 8-12 years. Right choice if you keep the car long-term.
- Refurbished — GH₵ 800-2,000. Rebuilt with new brushes, bearings, and often a new rectifier. Ask for a 3-6 month warranty. Great value if the vendor is reputable.
- Used (breaker parts from wrecks) — GH₵ 400-1,200. Cheap but you're gambling on remaining life. Only if you're keeping the car short-term.
The single most important spec: amp rating
Alternators are rated in amps (A). Common ratings for Ghana cars: 80A, 100A, 120A, 150A. The number tells you how much electrical load the alternator can supply. Undersize and it can't keep up (dim headlights, dead battery, warning lights). Oversize is safe but usually costs more. Read the amp number off your old alternator's sticker or ask your mechanic before ordering.
Typical prices in Ghana (2026)
Wide bands because of new vs refurb vs OEM. What we see day-to-day:
- Small sedan (Corolla, Vitz) — GH₵ 800 – 2,500
- Mid-size SUV (RAV4, CR-V) — GH₵ 1,200 – 3,000
- Full-size SUV (Highlander, Sorento) — GH₵ 1,500 – 3,800
- German sedan (C-Class, Passat) — GH₵ 1,800 – 4,500
- Luxury SUV (X5, GLE) — GH₵ 2,500 – 6,500
Signs a refurbished alternator was rebuilt properly
Not all refurbs are equal. Look for these before you accept delivery:
- Fresh paint on the housing, cleanly done (not sprayed over old dust).
- New brushes visible through the rear cover — should look like sharp new carbon rods.
- Bearings should spin freely with no grinding.
- Sticker or stamp showing the amp rating and rebuild date.
- Vendor offers at least a 3-month warranty.
Things to check at the same time
A new alternator only lasts if the surrounding system is healthy. Have these checked (or replaced) too:
- Battery — if older than 2 years, replace both together. A weak battery ages new alternators fast.
- Serpentine belt and tensioner — a worn belt slips and undercharges even a good alternator.
- Ground straps and connections — corroded terminals cause voltage drop that looks like alternator failure.
The AbosseyOkai Direct approach
We source from three vendor tiers depending on your budget: brand new (Bosch/Denso), refurbished with 6-month warranty, or used (only if you specifically ask). We verify the amp rating matches your car before we accept the part from the vendor. If a refurb fails within warranty, we handle the return.