Thread: My portable 12v solar power project

Originally Posted by Mathias

Nice, you will get approx 1.5amp/hr form each panel in bright sunlight, so the regulator will cope well with that size of battery. They look like polycrystalline panels? Monocrystalline area a bit more efficient in dull light (for reference).

Re the dull light performance of the poly panels, heres a exert from Aussie Batteries & Solar|Australian Direct 12 Volt Shop for Camping, Caravan and Batteries Direct

Myth: Monocrystalline solar cells are better than polycrystalline cells Monocrystalline solar cells have been superior for many years due to their higher peak efficiency and their availability. However, stating monocrystalline solar cells are better than polycrystalline is incorrect. Let’s briefly compare both types of cells. According to some, monocrystalline solar cells have a more aesthetic appearance due to their black cells. Typically, one square meter will generate approximately 190W which makes the panels slightly smaller than polycrystalline panels. Monocrystalline cells operate well (and often better than polycrystalline cells) under perfect weather conditions: during clear, sunny days. Polycrystalline solar cells have a blue colour with some patches that are lighter than others (due to multiple crystals) although their look has become gradually darker. They also reveal a better performance on days with less ideal sunlight and higher temperatures. Thanks to their multiple crystals, polycrystalline cells can produce more electricity as sunlight is reflected within the crystals. One square meter of polycrystalline cells generates about 180W which results in slightly bigger solar panels to allow an equal amount of wattage compared to the monocrystalline cells. - See more at: Common Solar And Battery Myths Busted