I'm setting up a solar system for my Sprinter camper and need advice on whether to go with a 12V or a 24V system, considering the lower sunlight in Ireland. I'm planning to install two Jinko Tiger Neo 445Wp panels, but I'd love to know if a 24V system is really beneficial in cloudy conditions. I estimate my energy use is between 1-3 kWh per day, but I'm uncertain about the impact of shading and efficiency. Any insights from those with similar setups would be greatly appreciated!
2 Answers
Going with a 24V system is definitely a good idea! Higher voltage panels can offer more power even in low-light situations, and they usually help reduce losses in the wiring since they draw less current. It’s also worth checking out panels that have multiple diodes; these can help with shading problems, allowing energy to bypass shaded cells. Overall, 24V has some major advantages over 12V unless you have a lot of 12V appliances you plan to run directly.
Hey, be cautious about your estimated energy use, especially the 3 kWh part. It might be tricky to achieve that daily with the Irish weather! Also, series connections for 24V are more sensitive to shading, but MPPT controllers help maximize your energy harvest even when it’s cloudy. I recommend connecting your panels in parallel for better performance. Lastly, you could consider getting smaller portable panels to catch the sunlight during those tricky dawn/dusk times.
Totally agree! I’m looking into portable panels too. Those Renogy solar blankets seem promising, but I’m waiting on reviews before I dive in.