When the battery goes over voltage does the unit move the power to a lower voltage battery or does it just dissipate the power in the heat sink?

No, it dissipates power from the higher battery.

Can this be used to balance my 24v lithium battery that is made up of 8 x 3.2v series-connected cells?

No. This is for balancing 12v batteries in series that already have their own BMS.

Do connect the 4battery bank with the 4/0 cable (I use 4/0 ) or do you connect with 18 awg wire, which is min. spec. of wire connect battery balancer?

Hi, the 4/0 won't fit in the Battery Balancer's connectors. Also, the current that will flow in it does not justify the use of a 4/0AWG wire. I'd go with Victron's recommendation : 18AWG

Will this protect both the starting (lead acid) and an auxiliary lipo battery. will it protect the alternator?

The Battery Balancer equalizes the state of charge of two series connected 12V batteries, or of several parallel strings of series connected batteries. When the charge voltage of a 24V battery system increases to more than 27V, the Battery Balancer will turn on and compare the voltage over the two series connected batteries. The Battery Balancer will draw a current of up to 1A from the battery (or parallel connected batteries) with the highest voltage. The resulting charge current differential will ensure that all batteries will converge to the same state of charge. If needed, several balancers can be paralleled. A 48V battery bank can be balanced with three Battery Balancers.

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Victron Energy Battery Balancer

Product ID: 45162675

Details

Brand
Victron Energy
Color
Red
Input Voltage
48 volts
Item Weight
247 g
Item dimensions L x W x H
4.7 x 10 x

⚡Balances 12V batteries in series

🔋Draws up to 1A to equalize charge

🔗Scalable for 24V to 48V systems

SAR 307

Duties & taxes included

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Description

🔋 Keep your batteries balanced, your power steady, and your system future-proof!

MODULAR SCALABILITY - Easily parallel multiple balancers for larger 24V or 48V battery systems.
SMART VOLTAGE ACTIVATION - Automatically activates above 27V to maintain perfect charge balance.
OPTIMIZE BATTERY LIFESPAN - Eliminates load imbalance to extend your battery bank’s life.
POWERFUL CURRENT EQUALIZATION - Draws up to 1 Amp to ensure all batteries reach the same state of charge.
TRUSTED QUALITY RELIABILITY - Victron Energy’s proven technology keeps your power system stable and efficient.

The Victron Energy Battery Balancer is a compact, high-quality device designed to equalize the charge between two series-connected 12V batteries or multiple parallel strings. It activates automatically when voltage exceeds 27V, drawing up to 1 Amp from the higher charged battery to balance the system. Scalable for 24V and 48V battery banks, it significantly improves battery lifespan and charging efficiency, making it an essential upgrade for any professional-grade power setup.

Specifications

ASIN	B01DH6B2D2
Best Sellers Rank	#26,319 in Automotive ( See Top 100 in Automotive ) #40 in Battery Testers
Brand	Victron Energy
Built-In Media	Victron Battery Balancer
Color	Red
Customer Reviews	4.3 4.3 out of 5 stars (540)
Global Trade Identification Number	08719076020950
Input Voltage	48 volts
Item Dimensions	4.7 x 10 x 11.3 inches
Item Type Name	Victron Battery Balancer
Item Weight	247 g
Manufacturer	Victron Energy
Mfr Part Number	BBA000100100
Model Number	BBA000100100
Number of Items	1
Power Source	Battery Powered
Unit Count	1 Count
Warranty Description	Warranty

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