Which Batteries for which product
Please specify which batteries work with RePhone and WIO - in your store, please
If solar panels were used, then I think that there would be no problems for a person with charging. Maybe you should read more about this subject on the website https://www.renogy.com/inverters/inverter-chargers/ . There are excellent inverters that can help with charging any devices by converting solar energy.
Jacob Ravel commented
Not sure, probably lithium-ion batteries. Clearly not solar panels.