Polycrystalline also start as a silicon crystal ‘seed’ placed in a vat of molten silicon. However, rather than draw the silicon crystal seed up as with Monocrystalline the vat of silicon is simply allowed to cool. This is what forms the distinctive edges and grains in the solar cell .Polycrystalline cells were previously thought to be inferior to Monocrystalline because they were slightly less efficient, however, because of the cheaper method by which they can be produced coupled with only slightly lower efficiencies they have become the dominant technology on the residential solar panels market The poly-crystalline solar panel have high charging rate of 6amps - 8amps to fill the battery of 100AHThis totally sealed Valve Regulated solar batteries are sourced from one of the world's largest manufacturers and are particularly suited to solar and inverter back up uses as well as many other cycle or standby applications. Particular features include:- Exceptional Recharge Performance - advanced, high specification plate design provides for long service life and good recovery after repeated deep discharges.Totally Sealed Construction - advanced sealing design ensures leak proof, maintenance-free operation, and freedom to mount in any position.Gas Generation Control - 99% of generated gases are internally absorbed with any excess being automatically vented through a safety valve regulated system. Low Self Discharge - low self discharge levels of less than 3% per month provide for extended storage periods.【Full Power】:Provides 300 Watts full continuous power DC to AC power and 600 Watts peak power, featuring 2 AC outlets and USB ports; ideal for powering iPod, cell phones, laptops, speakers, cameras, neon lights, game consoles, mobile phones, iPad and other devices【Easy to carry】: can be used for electricity needs during holidays, road trips, camping, etc. Featuring a universal cigarette lighter plug with long cable that plugs into almost any vehicle.【Multi-Protection】: built-in 40 amps fuse to protect your device. Safe charging design provides protection against, overheating, under and over voltage charging, short circuiting【Protection】: The thick alloy casing prevents the inverter from being dropped and impacted, and the high-speed cooling fan protects the inverter from overheating.