How does "green priority really work? if i'm driving and can pull 50a from truck alternator or 10a from solar what is my actual charge current?

The solar has priority, so 10 from solar and the remainder from your alternator.

Can a 50a redarc dc-dc charger be paralleled with a 25a charger to get a 75a charge rate?

Hi John, Thanks for your question. Ideally we like to match the chargers together when parallel connecting - eg 2x 50A, 2x 40A or 2x 25A etc. Our best thought would be 2x BCDC1240D units to keep it balanced, but in theory the 25A and 50A should still work ok. There may just be inefficiencies in charging output due to the mismatch is all. We hope that's helpful! Best regards, REDARC

Compatible with ford e 350 van 6.8 ltr v-10 ? van is 2008.

In general, yes, this is compatible with your Ford V-10. This DC-DC charger has so many features that you need to be more specific about what you are interested in. I have used several Redarc products in my van and RV builds and have never been disappointed. They get a premium price, but it is worth every penny.

The product literature mentions "Auxiliary battery," but not starting battery. Is this not suitable as an isolator between battery different banks ?

Hi there, Thanks for your question. Indeed the BCDC will be able to isolate between the Start and Aux batteries when the vehicle is turned off and the Vehicle input voltage to the unit is below 12.7V. The unit isn't able to 'charge back' to the Start battery or anything when using Solar, no. We hope that's helpful! Best regards, REDARC

Dual Input 50a In Vehicle Dc Battery Charger

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Description

🔋 Power your off-grid lifestyle with confidence and cutting-edge dual input tech!

TRUSTED AUSSIE ENGINEERING - Tested in the Outback with 45+ years of REDARC durability & global support
MULTI STAGE INTELLIGENT CHARGING - Optimized profiles for AGM, GEL, LiFePO4 & more, extending battery life
SOLAR READY WITH MPPT EFFICIENCY - Maximizes solar harvest while easing alternator load for eco-smart power
BUILT TO BRAVE EXTREME CONDITIONS - Waterproof, dustproof & heat-resistant up to 176°F for rugged reliability
DUAL POWER INPUTS FOR ULTIMATE CHARGING - Simultaneously charges from alternator & solar for nonstop energy flow

The REDARC Dual Input 50A In-Vehicle DC Battery Charger delivers robust, simultaneous charging from vehicle alternators and solar panels with advanced MPPT technology. Designed for 12V systems and compatible with multiple battery types, it features multi-stage charging to maximize battery health. Engineered for extreme environments, its fully sealed electronics resist water, dust, and heat up to 176°F. Backed by over 45 years of trusted Australian innovation and a 2-year warranty, this charger is the ultimate power solution for adventurers, RVers, and professionals needing reliable off-grid energy.

Specifications

ASIN	B07MT9T1Q5
Amperage	50 Amps
Brand Name	REDARC
Colour	Green
Connector Types	Cigarette Lighter (DC Power Jack)
Current Rating	50 Amps
Customer Reviews	4.6 4.6 out of 5 stars (74)
Global Trade Identification Number	09338628004690
Input Voltage	12 Volts
Item Dimensions D x W x H	12.7D x 33W x 7.6H centimetres
Item Weight	1.54 Pounds
Manufacturer	REDARC
Manufacturer Part Number	BCDC1250D
Model Number	BCDC1250D
Number of Items	1
Number of Ports	3
Output Voltage	12 Volts
Specification Met	Multiple

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