Farmers and market traders lose income when heat and unreliable electricity spoil fresh produce before it reaches buyers.
PRACTICAL PROJECT · Intermediate practical project
SolarChill Produce Box
Preserve tomatoes, vegetables, fish and dairy during unstable electricity supply.
◷ 3–5 weeks✎ 5 stages
A monitored insulated cooling-box prototype, temperature log, preservation comparison and viable rental or sales offer.
Produce farmers, market traders, food vendors, cooperatives and rural aggregators.
THE BUILD JOURNEY
01Every stage ends with evidence.
Discover · 3 days
02Investigate users and quantify the problem
Prove the local problem, customer and cost of inaction.
Design · 3 days
03Design the solution and business model
Create a safe product specification and a distinctive commercial offer.
Build · 5 days
04Source and build the prototype
Produce a functional supervised prototype with traceable materials.
Test · 4 days
05Test, improve and validate
Use repeatable tests and real-user feedback to prove performance.
Sell · 3 days
Cost, package and make the first offer
Turn the tested prototype into a credible product or service customers can buy.
LIVE COSTING LAB
Will the idea make money?
Adjust labour and profit assumptions. These September 2026 planning figures are illustrative; obtain current Nigerian supplier quotations before buying.
insulated box₦23,683
DC cooling module₦25,104
solar panel₦26,525
battery controller₦27,946
temperature sensor₦29,367
ESP32 monitor₦30,788
Materials per prototype₦163,413
Suggested selling price per unit₦245,1201 unit: ₦245,120 projected revenue · update prices with supplier quotations