How to Read Solar Panel Specifications: Decoding STC, Voc and More
Navigate the complex world of solar panel specifications with our comprehensive guide. Learn about STC, NOCT, and more to choose the right solar panel...
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Premium fixed solar panels
Premium fixed panels that make the most of limited roof space
Compare SunPower fixed panels and match output, size and electrical ratings to your installation.
Quick daily-charge check
Enter the installed panel power and battery voltage, then choose the nearest capital city and summer or winter conditions.
Melbourne summer uses 6.4 peak-sun hours and an 80% system allowance: about 2 kWh/day into a 12V bank.
Estimate only: panel watts × seasonal peak-sun hours × 80% system allowance ÷ nominal battery volts. Capital-city assumptions use Bureau of Meteorology mean daily solar exposure for summer (Dec–Feb) and winter (Jun–Aug). Shade, temperature, orientation, weather, wiring and controller limits can reduce charging.
Customer stories
Absolutely stellar service from Cameron at Solar 4 RVs. Initially had him quote up a solar system for my campervan back in June 2024 and then when I was ready to purchase in November 2024 he was able to give me the best prices for every product and so I went ahead with the order.
Also gave me some tips to commission the system once I installed the products. Stoked on the Victron gear. Thanks guys!
Purchased a 12v/15a battery charger in 2023. Had issues with it today (2025). Called their info number and explained. Instantly agreed to accept it as a warranty issue and dispatched a replacement without any problems. Extremely quick service and item dispatched express courier that same day. Outstanding customer service. Thank you.
Purchased a literal boat load of electronics from them for our vessel. It all works great and they did an amazing job setting up the panel. We have had the gear a few years now and still reach out when we need help. Great customer service!
Not sure which SunPower product suits your system? Send our technical team the model you are considering and your system details, and we will check the surrounding parts.
Ask our technical teamFrom the Solar 4 RVs library
Guides on panel specifications, cell types and array wiring for planning the rest of the solar system.
Solar 4 RVs guide
Navigate the complex world of solar panel specifications with our comprehensive guide. Learn about STC, NOCT, and more to choose the right solar panel...
Read guide →
Solar 4 RVs guide
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Solar 4 RVs guide
SOLAR 4 RVS OFF-GRID, EXTRA LOW VOLTAGE SOLAR PANEL WIRING GUIDE Please read this document in full before commencing installation. To maximise the...
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Explore the differences between PWM and MPPT solar charge controllers, their operation, and how to choose the right controller for your needs. Get to...
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Many travellers setting up solar on a caravan, RV, 4WD, or motorhome ask whether tilting roof panels is worth the effort. The idea is...
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Discover the step-by-step process to effectively test your solar panels. Learn about necessary equipment and how to measure your solar panel's performance to ensure...
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The SunPower company produces the highest efficiency solar cells on the market.
Their Maxeon® solar cell is fundamentally different with its unique copper foundation, our cell delivers unmatched reliability and allows us to build panels with the world record for highest efficiency
Powering Your Adventure
We gave it full sun... ☀️

