42 W i Solar Power Panel Folding Portable Kit and MPPT controller( which increases power conversion efficency up to 90 % )& 90Wh Li-polymer BatteryPortable solar kits aren't new, but the performance and design of these off-the-grid power solutions is continually improving. iSolars 42W kits is the latest example to grab your attention..and with even the 42W kit folding down to only 30 x 25 cm, this is getting into seriously portable territory.The iSolar kit come with a 12V x 90Wh Li-polymer battery that will power a laptop computer for up to 2 hours. It also comes with a Maximum Power Point Tracking Quick-charging MPPT Controller, which tracks variations in the current and voltage produced by the solar panel and ensures a maximum charge rate for the battery. It takes 4-5 hrs.The lithium battery has an inverter output as well as a USB port for bus powered devices. Other standard accessories include a cigarette lighter plug, DC to AC inverter and clamps for charging car batteries.Included in the Package:Standard Parts: 1. foldable solar panels2. MPPT quick-charging controller3. Li-polymer battery 4. DC to AC inverter 5. Car cigarette lighter plug6. Positive(+)/negative(-) –battery wire7. Double-ended connection wire (1.5m/59.1in)Shipping by EMSExpress Mail Courier - shipping time:Canada - US: 5 to 10 daysEurope: 5 to 10 daysAustralia: 4 to 8 days due to shortage of batteries, shipping Feb. 25thItem shipped by EMS or DHL - tracking number provided after shipping. items dispatched from Taiwan or China.