The disrespect in this solar business will actually make you lose your home training. ​You will sit down for 3 good hours doing real engineering work for a prospective client. You run proper load calculations so their AC and pumping machine won't trip the inverter, size the battery bank so the cells don't die after one year, calculate string voltages, balance of system, and correct DC cable sizes so their roof doesn't catch fire. You put everything in a clean, detailed BOQ and send it to them. ​Next thing, they take your exact design and carry it to one wireman down the street. They hand him your document and tell him: "See the exact list of what we need. How much will you collect to just buy these things and screw them to my roof?" ​My brother, you didn’t ask me for a quote. You collected free engineering consulting and full system design on a platter of gold. ​Fast forward three months later: the system cannot carry half of their daily load, the wireman used ordinary AC breaker on DC solar cables because "current na current," the inverter is mounted on a hot wall baking under direct sun, and one of the battery packs has entered permanent coma. ​Then by 7 AM on a Saturday, your WhatsApp will ring with a voice note: "Ah Engr, good morning. Quick question abeg. That inverter on the quote you sent me that time is beeping and showing Error 08, what do you think is causing it?" ​Oga, call that your wireman na. Why are you messaging me? ​As from today, zero free engineering. If you ask for a quote, you will only see the total capacity and the project cost. If you want component model, cable schedules, single-line diagrams, and detailed load audits, you will pay for consultation upfront. ​Cheap solar is always the fastest way to spend double.