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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🔋 Balance your power, boost your performance.

COMPACT LIGHTWEIGHT - Sleek 240g design fits perfectly into any professional energy management system.
EXTEND BATTERY LIFESPAN - Eliminates load imbalances to maximize your battery bank’s durability and ROI.
SCALABLE POWER SOLUTION - Stack multiple balancers for 48V systems—customize your energy setup with ease.
UNIVERSAL COMPATIBILITY - Works effortlessly with two 12V batteries or multiple parallel strings in series.
SMART VOLTAGE ACTIVATION - Automatically engages above 27V to ensure seamless, hands-off balancing.

The Victron Energy Battery Balancer intelligently equalizes charging states across series-connected 12V batteries or parallel strings, activating automatically above 27 volts. Drawing up to 1 Amp, it prevents battery imbalance, extending battery bank life and enabling scalable setups up to 48V with multiple units. Compact and lightweight, it’s a must-have for efficient, professional-grade energy management.

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Manufacturer	Victron Energy
Brand	Victron Energy
Model	Victron Battery Balancer
Product Dimensions	11.94 x 25.4 x 28.7 cm; 240 g
Batteries	1 A batteries required.
Item model number	BBA000100100
Is Discontinued By Manufacturer	No
Amperage	1 Amps
Item Dimensions L x W x H	11.9 x 25.4 x 28.7 cm
Color	red
Testing Certification	Não Aplicável
Item Weight	240 g

Victron Energy Battery Balancer

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