Compare grid bill relief, generator fuel savings, outage backup, battery choice, and quote-readiness using Guinea-Bissau planning assumptions. Replace the defaults with your bill, fuel receipts, and installer quote before you buy.
This country page uses the same Solar ROI calculation engine as the main Africa calculator, preloaded with Guinea-Bissau currency, tariff, fuel, solar yield, install cost, and battery assumptions.
Runs in your browser. No account is required. Inputs are planning estimates unless you choose to share or export them.
Use the same Guinea-Bissau assumptions to compare common solar sizes. The highlighted row follows the selected system size above; edit inputs to update the table.
| System size | Estimated cost | Monthly generation | Monthly savings | Payback | Panel count | Roof area | Battery fit | Best for |
|---|---|---|---|---|---|---|---|---|
| Enter assumptions to compare system sizes. | ||||||||
Solar payback in Guinea-Bissau starts with grid bills, generator fuel, and outages. This page preloads XOF defaults: 100 XOF/kWh electricity, 890 XOF/litre fuel, CFA 550,000/kW install cost, CFA 550,000 battery-cost band, and 5.5 peak sun hours/day. Treat the output as a planning estimate, not a quote.
Before asking for a final price in Guinea-Bissau, collect a recent bill or prepaid history, one fuel receipt if a generator is used, essential appliances, and real outage hours. The calculator starts at CFA 30,000 grid bill and CFA 16,020 generator spend. Ask the installer to verify pumps, freezers, AC units, medical fridges, and other surge loads.
At the Guinea-Bissau default of 100 XOF/kWh, every solar kWh used on site offsets that tariff. Higher tariffs can improve payback; subsidized, fixed-charge heavy, or low daytime-use bills can stretch it. Very unreliable grid. Heavy reliance on generators. Schools, clinics, landlords, and SMEs should check whether commercial tariffs differ from residential tariffs.
Generator fuel can change ROI because backup power often costs more per useful kWh than grid energy. This page uses 890 XOF/litre as the Guinea-Bissau fuel default and converts monthly generator spend into avoided litres and run-hours. Default liquid fuel price used to estimate generator spend. Replace with a recent receipt or official fuel schedule. If generator spend is high but payback still looks weak, test a battery-first essential-load quote.
Battery backup is not the same as total daily energy. Size it around appliances that must run during an outage: lights, fan, router, phones, POS terminal, fridge, freezer, medical fridge, pump controls, or a small workstation. This page uses CFA 550,000 as the Guinea-Bissau essential-load battery-cost band. Essential-load battery band derived from the 3 kW system-cost seed. Replace with quoted usable-kWh battery pricing. Ask for usable kWh, depth of discharge, chemistry, warranty, inverter compatibility, and replacement assumptions.
These examples use Guinea-Bissau planning defaults, not promises. Pick the closest bill, generator spend, and outage pattern, then edit calculator values.
Starter backup is usually enough if night load is kept small. Load: lights, fan, TV, router, phones, and a disciplined fridge plan.
Load this scenarioEssential-load battery sizing is the safer planning default. Load: fridge, lights, fans, TV, router, laptops, and daytime appliances.
Load this scenarioExtended backup may be justified when lost trading hours cost more than the battery. Load: POS, lights, fans, router, refrigeration, and trading-hour reliability.
Load this scenarioThis is a planning estimate, not a quote. Tariff, fuel price, battery price, install scope, performance ratio, and solar yield can move the result. The Guinea-Bissau solar yield default is 5.5 peak sun hours/day and performance ratio is 0.78. Country-level planning value. City, region, roof angle, shade, and PVOUT can move this materially.
| Value | Default | Confidence | Freshness | Source | Update |
|---|---|---|---|---|---|
| Electricity tariff | 100 XOF/kWh | Medium | Mar 1, 2026 | AGER-GB; AfroTools tariff planning seed | |
| Fuel price | 890 XOF/litre | Medium | Mar 1, 2026 | AfroTools fuel planning seed from country market context | |
| Install cost per kW | 550,000 XOF/kW | Low | Mar 1, 2026 | AfroTools installer-market planning assumption | |
| Battery cost band | 550,000 XOF | Low | Mar 1, 2026 | AfroTools battery band planning assumption | |
| Solar yield | 5.5 peak sun hours/day | Medium | Mar 1, 2026 | Global Solar Atlas / AfroTools country solar planning seed | |
| Performance ratio | 0.78 ratio | Low | Mar 1, 2026 | AfroTools PV performance planning assumption | |
| CO2 factor | 0.5 kgCO2/kWh | Low | Mar 1, 2026 | AfroTools generic avoided-emissions planning assumption |
Use this for tariff, fuel price, install cost, battery cost, solar-yield, or source corrections. The draft is saved in this browser with a timestamp and opened as an email you can review before sending.
Use your XOF monthly bill, generator spend, outage hours, system size, battery choice, and finance terms. This page starts with 100 XOF/kWh, 890 XOF/litre, CFA 550,000/kW, and 5.5 peak sun hours/day. Replace each value with local data.
Yes, if you run a petrol or diesel generator. Add monthly fuel spend in XOF or edit the 890 XOF/litre assumption. Generator savings can turn weak payback into a strong case for homes, shops, clinics, schools, churches, landlords, and SMEs.
Not always. A battery is mainly for backup and night-time essential loads, not cheaper solar by default. If outages affect stock, safety, medical refrigeration, trading hours, or night power, compare no-battery solar with an essential-load battery using the CFA 550,000 planning band.
Start with daily kWh, peak load, outage hours, and appliances that must run during a power cut. A small home may start around 1-2 kW, a family home around 3-5 kW, and a shop or clinic should check load, surge, refrigeration, and trading hours before choosing a size.
Quotes in XOF change with panel wattage, inverter brand, battery chemistry, usable capacity, protection devices, mounting, wiring distance, roof work, labour, warranty, maintenance, and finance charges. Treat CFA 550,000/kW install cost and the CFA 550,000 battery band as planning defaults, not a price list.
You can edit tariff, fuel price, solar yield, performance ratio, system size, install cost, battery cost, maintenance, deposit, interest, finance term, outage hours, and backup level. Use local bills, fuel receipts, and installer quotes when available.
No. Use this for early planning and quote comparison. PVWatts, PVGIS, Global Solar Atlas, and installer design tools can model location, roof angle, shading, inverter limits, cable runs, and production more precisely.
It is a planning estimate, not a quote. The Guinea-Bissau dataset was last reviewed on Mar 1, 2026 and confidence is Medium. Accuracy improves with recent XOF bills, real fuel receipts, a load profile, local solar-yield data, current equipment quotes, and provider finance terms.
Use these only when they answer the next question in your solar decision. For background reading, start with the generator vs solar guide.
Export a practical quote-checking packet with inputs, assumptions, results, payback timeline, battery backup, generator savings, roof planning, source freshness, and installer questions.