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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Renogy Wanderer 10 Amp 12V/24V PWM Negative Ground Solar Charge Controller Regulator Compatible with Bluetooth Module

Renogy Wanderer 10 Amp 12V/24V PWM Negative Ground Solar Charge Controller Regulator Compatible with Bluetooth Module

Product ID: 395261432

Details

Brand
Renogy
Colour
black
Material
Gel
Product Dimensions
11.9L x 7.5W x
Voltage
24 Volts

⚡10A max current output

📱Bluetooth-compatible monitoring

🔋4-stage intelligent charging

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$134

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Description

🔆 Power Your Off-Grid Life with Smarter Solar Control!

RUGGED COMPACT - IP32 waterproof rating and compact 5.2×3.1 inch design fits seamlessly in RVs and marine panels.
SMART LOAD MANAGEMENT - Manual, automatic, and timed load control modes for ultimate flexibility with lighting, pumps, and DC devices.
ULTRA LOW POWER DRAIN - Industry-leading <10mA self-consumption keeps your battery power intact when idle.
MAXIMIZE BATTERY LIFESPAN - Advanced 4-stage PWM charging extends battery life by 30%, perfect for AGM, Gel, Flooded & Lithium types.
REAL TIME REMOTE MONITORING - Backlit LCD + Bluetooth module compatibility lets you track system status and charge on the go.

The Renogy Wanderer 10A Solar Charge Controller is a compact, durable, and intelligent PWM regulator designed for 12V/24V systems. It features 4-stage charging to optimize battery health across multiple chemistries, ultra-low power consumption, and advanced load management. With an IP32 waterproof rating and Bluetooth compatibility for remote monitoring, it’s the ideal choice for professional and DIY off-grid solar setups.

Specifications

ASIN	B07NPDWZJ7
Best Sellers Rank	#194,752 in Garden & Outdoors ( See Top 100 in Garden & Outdoors ) #1,445 in Solar & Wind Power Parts & Accessories
Brand	Renogy
Brand Name	Renogy
Colour	black
Country of Origin	USA
Customer Reviews	4.3 out of 5 stars 3,002 Reviews
Display Type	LCD
Global Trade Identification Number	00816360029953
Included Components	Wanderer 10A solar charge controller
Item Dimensions L x W x H	11.9L x 7.5W x 2.8H Centimeters
Item Type Name	Compact Design w/ LCD Display for AGM, Gel, Flooded and Lithium Battery, Wanderer 10A
Item Weight	122 g
Manufacturer	Renogy
Material	Gel
Material Type	Gel
Model Number	Wanderer 10 Amp 12V/24V
Part Number	Wanderer 10A
Product Dimensions	11.9L x 7.5W x 2.8H Centimeters
UPC	816360029953
Voltage	24 Volts

Reviews

C**E

28.01.2026

K**N

26.02.2026

A**X

6.04.2026

T**G

3.07.2022

T**Y

6.01.2026

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