It is definitely made in China.

I Googled it and found the panels are made in Thailand and headquartered in Ontario California.

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HQST 190W 12V Monocrystalline Solar Panel w Solar Connectors High Efficiency Module PV Power for Battery Charging Boat, Caravan, RV and Any Other Off Grid Applications

Q: What pmw charger control would be need to maintain two 12v rv batteries?

A cheap little 30A should be more than enough if only using it for basic lighting, refrigerator control boards, electric water heater ignition, etc... and no need for more than 400w of solar panels. It can handle more but it's not necessary. 200w of solar PVs should more than adequate if you have lots of sun and not used for charging more than small devices, 400w in forested or regularly shaded locations. MPPT is a more efficient controller and low end 30A ones can be pretty inexpensive, but they often have the bonus of digital readouts, better automation, and battery conditioning if using vented lead acid deep cycle batteries. Read up on how to install if you're going to keep your ac charging unit and installing a battery isolater in the tow vehicle if it will be attached to the same circuit. Beware of PWM units being mirepresented as cheap MPPTs. I've seen that a lot.

Q: Does there need to be an air space between the panel and rooftop? Will it overheat if I just stick it to the roof of an rv?

No more than anything in the sun would heat up a roof. Their solar conversion to power causes little to no heat build up that I could ever tell, unless they were improperly installed and the current (amperage) exceeded the capacity of the wire used or improper fusing that would allow damage from a short to cause excessive current (highly unlikely since quality panels have diodes that should prevent this). You might consider leaving some sort of gap to allow for drainage of rainwater though. Don't want standing water to find it's way into cracks and cause water damage, especially on RVs since they are highly susceptible to roof leaks.

Product ID: 484916116

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Details

Brand
HQST
Material
Silicon
Product Dimensions
58.62"L x x
Item Weight
24.2 Pounds
Efficiency
High

Description

Specifications

Brand	HQST
Material	Monocrystalline Silicon
Product Dimensions	58.62"L x 1.38"W x 26.38"H
Item Weight	24.2 Pounds
Efficiency	High Efficiency
Connector Type	USB
Included Components	Connectors, Frame, Battery, Solar Panels
Maximum Voltage	12 Volts
Maximum Power	190 Watts
Manufacturer	HQST
Item Weight	24.2 pounds
Item model number	PartialUpdate
Size	190W
Color	190W
Shape	Rectangular
Power Source	Battery Powered
Batteries Included?	No
Batteries Required?	No

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