Is the output voltage range adjustable? I have a 24v lead acid battery bank and want to keep a 27.5v charge. Is this possible?

It is. You can actually set up both float and absorbtion voltage, as well as absorbtion duration . You can also run equalization manually or automatically. You do it all using a cell phone app.

I have 2 260w solar panels rated at 38.1voc. Im trying to set up a 12v battery bank that this will charge. Will the 150v/35A be too big for my system?

520 watts (panels) / 13.5 volts (charging voltage) = 38.5 amps. Since you will likely never see 100% efficiency from your panels, 35 amps on the controller is appropriate. If for some reason you got all 520 watts, no harm done, just a few amps unused for a few minutes at Noon on a perfect day. The voltage on the panel side is irrelevant as long as it is below the max rating on the controller.

Can i put 4 in series, w/ 48v battery? 4 panels x 37.44 v = 149.76 v 4 panels x 8.68 a = 34.68 a

Something to keep in mind is on a very cold day your voltage of the panels can go a few volts higher than normal, if that exceeds the 150 volt max of the controller you risk damaging it. You would definitely be better off with 2 in series and 2 in parallel. Just make sure your wiring can handle 20 amps vs 10 amps you would need to handle all 4 in series. Otherwise you'd need to step up to a charge controller with a higher voltage rating to prevent damage on a cold day. If you exceed the amperage it doesn't hurt anything, you just don't get the full output of the array, but if you exceed the voltage it will fry it.

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SmartSolar MPPT Charge Controller 150V, 35A 12/24/36/48V | Bluetooth Solar Charge Controllers for Solar Panels

Product ID: 53353222

Details

Brand
Victron Energy
Color
No Color
Material
Plastic
Product Dimensions
8.07"L x x
Voltage
12

⚡35A max current output

📱Bluetooth app connectivity

🔋Supports 12/24/36/48V battery systems

Description

🔆 Charge smarter, live greener — power your future with Victron Energy!

SMART SYNC - Multiple controllers sync seamlessly for ultimate battery care.
LOAD PROTECTION - Intelligent load output safeguards your devices and battery health.
REAL TIME CONTROL - Bluetooth app lets you monitor and customize your system anywhere.
UNIVERSAL VOLTAGE - Flexible 12-48V compatibility fits all your solar setups.
MAXIMIZE EVERY RAY - Lightning-fast MPPT tech ensures peak solar power even in shade.

The Victron Energy SmartSolar MPPT Charge Controller delivers up to 35A of optimized solar charging across 12 to 48V battery systems. Featuring advanced MPPT technology, Bluetooth connectivity via the VictronConnect app, and synchronized multi-controller operation, it maximizes solar energy harvest while protecting battery longevity and connected loads. Compact and reliable, it’s a top-tier choice for professional-grade solar setups.

Specifications

ASIN	B073ZHRG9K
Best Sellers Rank	#15,479 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #9 in Renewable Energy Controllers
Brand Name	Victron Energy
Color	No Color
Customer Reviews	4.6 4.6 out of 5 stars (625)
Display Type	LCD or LED
Included Components	Victron Energy SmartSolar MPPT 150V 35 amp 12/24/36/48-Volt Solar Charge Controller (Bluetooth)
Item Dimensions L x W x H	8.07"L x 5.12"W x 3.54"H
Item Type Name	Victron Energy SmartSolar MPPT 150V 35 amp 12/24/36/48-Volt Solar Charge Controller (Bluetooth)
Item Weight	1.6 kg
Manufacturer	Victron Energy
Material Type	Plastic
Model	SCC115035210
Number of Items	1
Number of Packs	1
Part Number	SCC115035210
Unit Count	1 Count
Voltage	12 volts_of_direct_current
Warranty Description	Warranty

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