shows the battery voltage & solar charge but the used by inverter and remaining hours is blank - how do i get this to read?

This charge controller device does not monitor your separate inverter. Only the battery and the solar charge. There are 12 volt load terminals on the charge controller but those should not be connected to an inverter per the manufacturer's requirement. However turning off the inverter and monitoring the battery state of charge will let you know how much charge is left to get to the lowest recommended level of 20%. Full charge depends on the battery type: 12.7 for lead acid, 13.0 for AGM, and 13.6 for LiFePo4. If it shows higher that it is showing the higher solar charge voltage. You can calculate the load on the battery by multiplying the amps of the 120 volt appliances by 10. Then divide the amp hour of the battery (times the current state of charge that this device shows less 20% ) by the 12 volt amp load to get number or hours remaining. Make sure you turn off your inverter when not using your 120 volt appliances.

Are there better instructions than the booklet that offers zero explanation of how the device and or the app works to properly monitor my system?

Try Ytube it has some decent videos

Battery charging volts is set at 14.4v, but app shows max battery voltage at over 20v. is this normal? lifepo4 battery set to lithium on controller.

Check to see if the over 20v is the voltage of the solar panel. It is normal for solar panel voltage to be near 20 v. The controller steps it down to 12 to 14.4 voltage.

Can it be mounted outside?

I don't see why it wouldn't be okay outdoors. The unit is well sealed. UV exposure is my only unknown.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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BT-1 Bluetooth Module for PWM Charge Controllers (Wanderer/Adventurer) – RJ12 RS232 Port, Wireless Monitor via DC Home App,IP54

Product ID: 207358732

Details

Brand
Renogy
Color
Black
Item Weight
130 g
Material
Plastic
Product Dimensions
2.65"L x x

📱Bluetooth 4.2 + BLE tech

📶82ft wireless range

🔋Solar-powered via RJ12 port

23.80 OMR

Duties & taxes included

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Description

🔆 Stay connected to your solar power like a pro—wireless control, zero hassle.

PLUG PLAY POWER - Powered directly through the RJ12 port—no extra batteries or wiring needed.
SEAMLESS SOLAR CONTROL - Wirelessly monitor & adjust your Renogy charge controllers anytime, anywhere.
SMARTPHONE INTEGRATION - Control and track your solar system via the intuitive Renogy DC Home app.
EFFORTLESS CONNECTIVITY - Bluetooth 4.2 with BLE ensures fast, stable communication up to 82 feet.
DURABLE WEATHER RESISTANT - IP54-rated protection means reliable performance in outdoor environments.

The Renogy BT-1 Bluetooth Module upgrades compatible Renogy PWM charge controllers by enabling wireless monitoring and control through the Renogy DC Home app. Featuring Bluetooth 4.2 with BLE for fast, reliable communication up to 82 feet, it’s powered directly via the RJ12 port and built with IP54-rated durability for outdoor use. Perfect for millennial professionals seeking smart, efficient solar management on the go.

Specifications

ASIN	B0894SDTSL
Best Sellers Rank	#6,591 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #4 in Renewable Energy Controllers
Brand Name	Renogy
Color	Black
Customer Reviews	4.4 4.4 out of 5 stars (2,164)
Display Type	LED
Global Trade Identification Number	00810009714415
Included Components	BT
Item Dimensions L x W x H	2.65"L x 1.38"W x 0.55"H
Item Type Name	Compatible with Renogy Rover/Wanderer/Adventurer Charge Controllers
Item Weight	130 g
Manufacturer	Renogy
Material Type	Plastic
Model	Bluetooth Module
Number of Items	1
Part Number	BT-1 Bluetooth Module
UPC	810009714415
Unit Count	1 Count
Warranty Description	1-year material and workmanship warranty

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