White Distribution Marine Boat Battery Switch Marine Dual Battery Selector Switch for Boat RV Motor
Application: 
Suitable for ship supply systems of 6 volts, 12 volts, 24 volts, 32 volts.
Description:
Small size, beautiful appearance, durable.
3/8"-16 tinned copper studs with high electrical conductivity and high corrosion resistance.
Easy to install, there are a variety of installation options.
12 VDC, continuous operation at 175A, 300A intermittent operation.
Two batteries or panels are completely disconnected in the OFF.
Weight: 600g
Material: plastic
Size:14 x 14 x 8.5 cm
Color:White
Max. Amp: 300A
Switch Position: 4
It is rated at 175A continuously duty at DC-12V and rated at intermittent 300A.
Note:
This switch can operate normally from a battery and can also be used as an auxiliary battery.
When the battery is low, you can turn the switch to the BOTH position and connect 2 batteries together.
Battery select switches are found on boats with two or more batteries. They designate which battery or battery bank is being used for starting the engine(s), powering the accessories on board, and receiving a charge from the outboard engine(s). 
There are four positions on the switch:
1, 2, BOTH (sometimes labeled 1+2) and OFF.
Position 1 draws from Battery 1 or Bank 1;
Position 2 draws from Battery 2 or Bank 
2. The BOTH position is utilized when you cannot crank the engine in Positions 1 or 2 alone due to weak batteries, and combines the power from both batteries or banks.
After starting an engine the switch should be returned to the 1 or 2 position.
We do not recommend operating for extended periods in the BOTH position.
In normal use with twin engines, select Position 1 on one switch and Position 2 on the other so both batteries or banks are being used and charged.
On single engine applications, alternate between Position 1 and 2 routinely.
The OFF position should be used only when the engine is not running to secure the electrical system and prevent accidental discharge.
The bilge pump automatic float switches will still operate when the battery select switch is in the OFF position.
Note: Never turn the battery select switch to the OFF position while an engine is running, including passing through the OFF position when switching from 1 to 2. This can cause damage to the engine’s charging system.
Package included: