But who wants to do math in a trench or on a roof? Use a calculator. If you don't have a calculator handy, memorize these "Rough as guts" rules for Copper V-90HT (Standard building wire):

Solar panels (DC) are far less forgiving than AC. Because voltage is lower (12V, 24V, or 48V), a 1V drop is a huge percentage. For DC systems (caravans, off-grid), aim for 3% max , not 5%.

🇦🇺 Disclaimer: This information is for educational purposes. Always consult a licensed electrical contractor and refer to the current AS/NZS 3000 standards before performing electrical work.

Drop Calculator Australia | Voltage

But who wants to do math in a trench or on a roof? Use a calculator. If you don't have a calculator handy, memorize these "Rough as guts" rules for Copper V-90HT (Standard building wire):

Solar panels (DC) are far less forgiving than AC. Because voltage is lower (12V, 24V, or 48V), a 1V drop is a huge percentage. For DC systems (caravans, off-grid), aim for 3% max , not 5%. voltage drop calculator australia

🇦🇺 Disclaimer: This information is for educational purposes. Always consult a licensed electrical contractor and refer to the current AS/NZS 3000 standards before performing electrical work. But who wants to do math in a trench or on a roof