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

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REDARC Dual Input 50A in-Vehicle DC to DC Battery Charger with MPPT Solar Regulator, Green Power Priority, 12V/24V Compatible, for Lithium, AGM, Gel, Lead Acid, Calcium, LiFePO4 Batteries

Product ID: 170175166

Details

Brand
REDARC
Color
Green
Item Weight
1.5 pounds
Output Voltage
12 volts
Product Dimensions
5"D x 13"W x

⚡50A dual input power

☀️MPPT solar optimization

🛡️rugged, weatherproof design

₨20920

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Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Power your journey, anywhere, anytime — because your adventure deserves the best.

BUILT FOR EXTREMES - Sealed, rugged design thrives through dust, water, heat, and vibration—perfect for off-road pros.
DUAL INPUT POWERHOUSE - Simultaneously charges from alternator & solar for unstoppable energy flow.
SOLAR FIRST EFFICIENCY - MPPT tech prioritizes green power, slashing alternator load and boosting eco-friendly charging.
TRUSTED AUSSIE ENGINEERING - 45+ years of reliability with a 2-year warranty and global support network backing your adventures.
UNIVERSAL BATTERY COMPATIBILITY - Smart multi-stage charging tailored for Lithium, AGM, Gel, Lead Acid & more.

The REDARC Dual Input 50A DC to DC Battery Charger combines vehicle alternator and solar inputs with advanced MPPT solar regulation to efficiently charge a wide range of 12V/24V batteries. Engineered for durability in extreme conditions, it supports battery banks 200AH+ and is trusted globally with over 45 years of Australian innovation.

Specifications

ASIN	B07MT9T1Q5
Amperage	50 A
Best Sellers Rank	#593,593 in Automotive ( See Top 100 in Automotive ) #1,398 in Battery Chargers
Brand	REDARC
Color	Green
Current Rating	50 A
Customer Reviews	4.8 4.8 out of 5 stars (35)
Global Trade Identification Number	09338628004690
Input Voltage	12 volts
Item Dimensions D x W x H	5"D x 13"W x 3"H
Item Weight	1.5 pounds
Manufacturer	REDARC
Mfr 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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