Is over paneling a problem ? The 100/20 specs 290 watt for a 12v system. My 2 panels are 300 watt together. Series/parallel volt/amp within range. ?

On the panel side this MPPT will take max 100V and on the battery side it can push max 20A. This means that your Voc (open circuit voltage of the whole string should never be more than 100V. I had these running to the max, 1 controller controlling 4 panels of Voc 48V each. I did 2 panels in series and 2 in parallel. I live in the tropics. during the morning this gives me on the battery side a Pmax of 19 A at about 50V. the controller gets hot but works fine for over a year already. When the battery is full, the PV Voltage goes up to 96V with low Amps. If you 'd run the Amps higher, the white 20A fuse will trip (looks like a car fuse). Never put a panel string higher then Voc 100 V as that will damage the electronics of the controller. I would recommend a slightly lower amps (battery side) and V(panels side) then what I do in order for the controller not to become as hot. I have put a computer fan on mine now to keep it a bit cooler. These are really good controllers. Hope this helps Patrick

Is the dongle or bluetooth required to make adjustments? How can I adjust battery chemistry or voltage with just this unit?

The cable data is required by the equipment for configuration according battery type. the cable data is an additional accessory. You can visit : https://www.victronenergy.com/media/pg/Manual_BlueSolar_MPPT_75-10_up_to_100-20/en/configuration-and-settings.html

It has a Load output? Need more details on that

The load output feature on the Blue Solar MPPT is used to regulate how much load is placed on your batteries to help prevent them from running batteries flat. IT is merely a safety feature that helps promote the lifespan of your batteries.

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Victron Energy BlueSolar MPPT Solar Charge Controller 100V, 20A, 48V

Victron Energy BlueSolar MPPT Solar Charge Controller 100V, 20A, 48V

Product ID: 259105788

Details

Brand
Victron Energy
Color
Blue
Material
Several
Product Dimensions
4.44"L x x
Voltage
100 volts

⚡100V max input voltage

📱Bluetooth remote monitoring (dongle required)

🔋20A max charging current

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Description

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

REMOTE CONTROL READY - Add a Bluetooth dongle to monitor and control your system from your smartphone anytime, anywhere.
SMART BATTERY LONGEVITY - Intelligent charge algorithms extend your battery’s life for long-term power reliability.
COMPACT DURABLE DESIGN - Sleek, lightweight build fits seamlessly into your energy system without bulk.
MAXIMIZE SOLAR EFFICIENCY - Lightning-fast MPPT tech ensures you harvest every ray, even in partial shade.
HIGH VOLTAGE COMPATIBILITY - Supports up to 100V input and 48V battery systems, perfect for advanced solar setups.

The Victron Energy BlueSolar MPPT Solar Charge Controller is a high-performance 100V, 20A device designed to optimize solar energy harvesting and battery charging. Featuring advanced MPPT technology and intelligent charging algorithms, it maximizes power output even under partial shading. Compatible with 48V battery systems and remotely controllable via an optional Bluetooth dongle, this compact controller is ideal for professionals seeking efficient, reliable solar power management.

Specifications

ASIN	B08LBWKTNF
Best Sellers Rank	#8,846 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #5 in Renewable Energy Controllers
Brand Name	Victron Energy
Color	Blue
Customer Reviews	4.2 4.2 out of 5 stars (289)
Display Type	LED
Included Components	Victron Energy MPPT solar charge controller
Item Dimensions L x W x H	4.44"L x 3.93"W x 2.36"H
Item Highlight	Charge Controllers for Solar Panels, Certified to UL1741
Item Weight	490 g
Manufacturer	Victron Energy
Material Type	Several
Model	NT-1230
Number of Items	1
Operating Temperature	20 °C
Part Number	NT-1230
Unit Count	1 Count
Voltage	100 volts

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SAR 472

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In stock

Sold byAmazon KSADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to KSA.

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TrustScore 4.5 | 7,300+ reviews

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