Recently the output from controller has been over 16 volts. Hooked up to two 100 watt panels. Is this unit bad? Don't want to damage my batteries.

UNREGULATED 16 Volt DC can damage a battery but a working controller should prevent this. You can check the output of the controller and see what the voltage is. Should be no more than 15 Volts DC at most ... if it's higher, you have a problem that should be corrected. You may have a higher voltage directly off the panel without the controller. Mine in bright sunlight can get as high as 20 Volts DC. Again ... a working controller should prevent you from frying your battery. Just make sure it's working before hooking up the battery!

I have two 100watt hqst panels that are 5.8amps. i can’t put these in parallel can i?

I wouldn't do that. I would get a controller that could handle12 amps like a 20 amp or at least 15 amps. If you exceed the rated capacity then it may damage the unit or cause malfunction. They make higher capacity controllers at Renogy for a little more cost. I only have one 50 watts panel to keep a battery topped off which is around 2.85 amps.

I have a single renogy 100w 12v poly/ mono solar panel. is it possible to use this panel/controller combo to charge 2 12v batteries in series?

It should work with your setup since it automatically detects 12 or 24 volts. One thing That might be a problem is the 12v panel voltage. You may need a higher voltage panel or put two panels in series. It should be easy to do a quick mock up on the ground and check it out. Also, my advice is worth exactly what you are paying for it.

Can I hook up a 24 volt solar panel and charge a 12 volt battery?

Thank you for contacting Renogy, The 10-amp Wanderer can accept up to 50-Volts D/C. However, please note that it can only accept 100-watts of solar input when charging a 12-volt battery bank.

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⚡ Power your freedom with smart solar control!

REAL TIME LED STATUS - Instantly monitor charge status and battery health with intuitive LED indicators.
COMPACT VERSATILE DESIGN - Sleek, lightweight form factor fits anywhere—perfect for on-the-go professionals.
SMART 4 STAGE PWM CHARGING - Boosts battery lifespan and system efficiency with Bulk, Boost, Float & Equalization modes.
BLUETOOTH ENABLED REMOTE CONTROL - Connect via RS232 and Renogy BT-1 to manage your solar setup from your smartphone.
EFFORTLESS BATTERY COMPATIBILITY - Seamlessly supports AGM, Gel, Flooded & Lithium 12V batteries for ultimate flexibility.

The Renogy Wanderer is a compact 30A PWM solar charge controller designed for 12V battery banks, including lithium types. Featuring smart 4-stage charging, LED status indicators, and Bluetooth connectivity via the Renogy BT-1 module, it offers professional-grade battery management and remote monitoring in a sleek, easy-to-install package.

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Item weight	0.3 Pounds
Display type	LED
Operating temperature	20 Degrees Celsius
UPC	816360027676
Global Trade Identification Number	00816360027676
Manufacturer	Renogy
Color	black
Size	30A PWM Li
Style	Charge Controller
Compatible with	Smartphones
Material Type	Lithium
Number of Items	1
Power Source	Solar Powered
Included Components	controller
Batteries Included?	No
Item model number	Charge Controller
Product Dimensions	16.38 x 10.95 x 4.47 cm; 136.08 g
ASIN	B07G1PL1B9

Renogy Wanderer

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