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 Li 30A PWM Solar Charge Controller 12V for Solar Panels | 25V PV input, LED，AGM/Gel/Flooded (auto), Li (manual), overcharge/short protection, negative ground, temp comp, for RVs

Product ID: 77890431

Details

Brand
Renogy
Color
black
Material
Lithium
Product Dimensions
6.5"L x 4.3"W
Voltage
12 volts

⚡30A max charge current

💧IP32 waterproof & corrosion-resistant

🔋Supports Li, AGM, Gel, Flooded batteries

E£ 5685

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Sold byAmazon EGYPTDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔆 Charge smarter, live freer — power your off-grid lifestyle with confidence!

SMART MONITORING READY - Pair with BT-1 module to unlock Bluetooth control and real-time solar system insights via the DC Home App.
POWER PACKED 30 A CHARGING - Fast, efficient 4-stage PWM charging maximizes battery life and performance.
BUILT TO BRAVE THE ELEMENTS - Compact, IP32-rated waterproof design with corrosion-resistant casing for rugged outdoor use.
UNIVERSAL BATTERY COMPATIBILITY - Seamlessly optimizes charging for Lithium, AGM, Gel, and Flooded batteries—one controller, endless possibilities.
EFFORTLESS INSTALLATION SECURE CONNECTIONS - Tool-free DIN rail or wall mounting with large, secure terminals that handle thicker gauge wires—no more frustrating setups.

The Renogy Wanderer Li 30A PWM Solar Charge Controller is a compact, durable 12V controller designed for RVs, boats, and off-grid solar setups. It supports multiple battery chemistries with smart 4-stage PWM charging, offers robust protection against overcharge and short circuits, and features waterproof, corrosion-resistant housing. With easy installation and optional Bluetooth monitoring, it ensures reliable, optimized solar charging in any environment.

Specifications

ASIN	B07G1PL1B9
Best Sellers Rank	#3,260 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #2 in Renewable Energy Controllers
Brand Name	Renogy
Color	black
Customer Reviews	4.4 4.4 out of 5 stars (2,354)
Display Type	LED
Global Trade Identification Number	00816360027676
Included Components	controller
Item Dimensions L x W x H	6.5"L x 4.3"W x 1.8"H
Item Type Name	Solar Panel Regulator w/ Temp Sensor Function Fit for Lithium, Sealed, Gel, and Flooded Batteries, Wanderer Li 30A
Item Weight	4.8 ounces
Manufacturer	Renogy
Material Type	Lithium
Model	Charge Controller
Number of Items	1
Number of Packs	1
Part Number	RNG-CTRL-WND30-LI
UPC	816360027676
Unit Count	1 Count
Voltage	12 volts
Warranty Description	1-year material and workmanship warranty

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