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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🔋 Charge smarter, live freer — power your adventure with Renogy Wanderer!

COMPACT SLEEK DESIGN - Fits effortlessly into any setup without clutter or fuss.
POWER PACKED 30 A CAPACITY - Handles up to 30 amps for robust 12V battery charging.
BLUETOOTH READY CONNECTIVITY - Monitor and control your system remotely with Renogy’s Bluetooth module.
INTELLIGENT 4 STAGE CHARGING - Boosts battery lifespan with Bulk, Boost, Float & Equalization modes.
UNIVERSAL BATTERY COMPATIBILITY - Seamlessly supports Lithium, AGM, Gel, and Flooded batteries.

The Renogy Wanderer Li 30A 12V PWM Charge Controller is a compact, versatile device optimized for 12V battery banks including lithium, sealed, gel, and flooded types. Featuring smart 4-stage PWM charging, it maximizes battery life and system efficiency while offering intelligent protections like reverse polarity and short-circuit safeguards. Compatible with Renogy’s Bluetooth module, it enables remote monitoring and control, making it an essential upgrade for any off-grid or mobile power setup.

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UPC	816360027676
Global Trade Identification Number	00816360027676
Manufacturer	Renogy
Color	black
Shipping Weight	0.32 Kilograms
Item Model Number	Charge Controller
Item Part Number	RNG-CTRL-WND30-LI
Is Assembly Required	No
Capacity	30A PWM Li
What is in the box?	controller
Country of Origin	USA

Renogy Wanderer Li 30A 12V PWM Negative Ground Charge Controller Compatible with Lithium, Sealed, Gel, and Flooded Batteries and Renogy Bluetooth Module

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