300W solar battery is 36V, suitable for charging 24V batteries, that is, two 12V batteries connected in series, based on hours maximum sunshine 4-6 hours per day, can fully charge two 12v50ah12v75ah batteries.
Thirty watt solar panels are generally used to charge 12V batteries. If equipped with a high-efficiency charger, the maximum charging current can reach around 2 .5A if the configured battery charges a 10.-hour rate For battery charging, the suitable battery capacity is about 25AH (2.5×10); if the battery is charged at a rate of 20 hours, the suitable battery capacity is about 50AH (2.5×20).
Monocrystalline silicon solar panels:
The photoelectric conversion efficiency of monocrystalline silicon solar panels is about 15%, the highest areaching 24%. It has the highest photoelectric conversion efficiency among all types of solar panels, but its production cost is so high that it cannot be widely and commonly used in large quantities. Since monocrystalline silicon is typically encapsulated in tempered glass and waterproof resin, it is strong and durable, with a lifespan of typically up to 15 years and up to 25 years.