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Product: DOKIO 300W 18V Portable Solar Panel Kit (41x21inch) Folding Solar Charger with 2 USB Outputs for Phones Work for 12v Batteries/Power Station AGM LiFePo4 BLUETTI EB240 RV Camping Trailer Car Marine

If there is any problem with the product, please feel free to contact us, we will provide you with a satisfactory solution within 1-2 days and will not let you suffer any loss.，This product is primarily designed to charge batteries. Using without batteries is primarily providing power to the USB ports. If you want higher power generation efficiency, you can buy MPPT and use it

If your solar generator has a controller built into it, you may be able to just connect this solar panel (without its included controller) directly to your solar generator, Without the voltage regulation provided by the controller your chance of cooking the battery by overcharging is possible.

NOT day-in day-out exposure. Sun damage to fabric case is most likely

Question: Are this units waterproof?

Answer: Yes,It is waterproof ,BUT meant for temporary or emergency use only. Not designed for permanent installation or prolong weather exposure.DON'T leave them out at night or in bad weather.

Question:Does this kit come with some sort of stand?

Answer:There is no stand. I lean in against my RV or RV tires. I have been very happy with this panel set though

Question:On solar panels before I purchase i want to know, if you put on the roof of the house, how long will last before go bad?

Answer:You don’t want flexible panels for that purpose. Get the hard panels. They last longer.

If any accessories are missing or damaged, please contact us for replacement in time

【FOLDABLE AND LIGHTWEIGHT EASY TO CARRY】-- This solar panel photovoltaic packs 300W of power yet is only 0.9inch thick,Foldable Dimension 41x22inch and weighs 17lb, making it easier to mount,transport, hang, and remove.
【COMPLETE KIT，WORKS OUT OF THE BOX 】-- Solar charger for all 12V batteries ,with its 18V optimum power voltage.Protection against: overcharging, overload, short-circuit
【PORTABLE DESIGN AND WIDE APPLICABILITY】-- 9.85ft (3m) cable length from panel to controller, For most power stations (Jackery,Goal Zero,Ecoflow,Paxcess) and 12-volt batteries(AGM,LiFePo4,Deep cycle batteries),RV,car,boat,trailer,truck,pumpa,camping,van,emergency power
【POWERFUL HIGH CONVERSION EFFICIENCY】-- With high efficiency monocrystalline solar cell, you will get greater power efficiency even though the panel is smaller than a traditional model.Maximizes system output by reducing mismatch loss.
【WELL PACKAGED, QUICK DELIVERY】-- Amazon US warehouse shipping, Receive goods in time，If the accessories are lost after the transportation process, please contact us in time. DOKIO