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 Battery Balancer

Product ID: 219010452

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Details

Brand
Victron Energy
Number Of Cells
6
Terminal
M8 Terminal
Manufacturer
oem
Global Trade Identification Number

⚡1A current balancing

🔄Converges charge states seamlessly

🔋Equalizes multiple 12V batteries

Description

🔋 Balance your power, boost your performance.

SMART CURRENT DRAW - Draws up to 1A from the highest voltage battery to harmonize charge states dynamically.
PLUG AND PLAY INSTALLATION - No assembly required—get your battery bank balanced and optimized in minutes.
COMPACT LIGHTWEIGHT DESIGN - At just 240g and under 30cm, it fits seamlessly into any power system setup.
PRECISION CHARGE EQUALIZATION - Ensures all connected batteries share the same optimal charge level for maximum lifespan.
SUPPORTS COMPLEX BATTERY SETUPS - Balances two series 12V batteries or multiple parallel strings effortlessly.

The Victron Battery Balancer intelligently equalizes the charge between two series-connected 12V batteries or multiple parallel strings by drawing up to 1A from the highest voltage source. This dynamic balancing ensures all batteries converge to the same state of charge, extending battery life and optimizing system reliability. Compact and easy to install, it’s a must-have for professional-grade battery management.

Specifications

Manufacturer	oem
Brand	Victron Energy
Product Dimensions	11.94 x 25.4 x 28.7 cm; 240 g
Batteries	1 A batteries required.
Item model number	BBA000100100
Manufacturer Part Number	BBA000100100
Volume	1457 Millilitres
Stain Resistant?	No
Assembly Required	No
Safety Rating	Não Aplicável
Amperage	1 Amps
Manufacturer	oem
Country of Origin	USA
Item Weight	240 g

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