# Often asked: Why Does A School Bus Have Three Batteries?

## How many batteries does a school bus need?

Normally 2 is enough. I did just put a 3rd battery in my bus and i have noticed a few advantages. First the engine cranks faster.

## Are school busses 12v or 24v?

Most buses of a school bus nature are 12 volt NOT 24 volt and they use 2 or 3 group 31 batteries (usually).

## Why are there 3 lines on a school bus?

The three black rails that run along the sides and back of the bus are called rub rails. Each bus has them and here’s why. First, they’re an extra layer of protection for the thin walls of a school bus. They’ll absorb the force of a collision and a car from caving in the whole side of a bus.

## Where are the batteries located on a school bus?

Locate the battery compartment on the bottom of the school bus.

## How much does a bus battery cost?

Assuming an average battery capacity of 200 kWh (which represents a mix of depot and en route BEBs) delivers a BEB battery cost of \$100,000. If the 10% annual reduction in battery pack costs continues, electric bus purchase prices will fall, as shown in Figure 1.

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## What is a Type 31 battery?

Group 31 batteries are relatively large and powerful batteries, featuring 20h capacity in 75-125 Ah range, providing 750-1250 CCA, 150-250 minutes RC, etc.

## How many volts is a school bus battery?

You hook the 12 volt batteries up in a parallel circuit so no matter how many batteries you use its still 12 volts. “Parallel circuit” = positive battery terminal on one battery connects to positive on another, this maintains a 12 volt system with a larger reserve capacity than one battery would provide.

## Why do school busses not have seatbelts?

Large school buses are heavier and distribute crash forces differently than passenger cars and light trucks do. Since the sizes and weights of small school buses are closer to those of passenger cars and trucks, seat belts in those vehicles are necessary to provide occupant protection.”

## Do lines on a school bus mean anything?

Those black stripes are there to help protect the children in the event of a collision. They are known as “rub rails” and they also stop a car that hits the side of the bus from harming the entire side of the vehicle. This was explained on YouTube by a bus driver that calls himself ClawBoss.

## What are the white school buses for?

The white roofs also make the vehicles easier to spot and anything that keeps children safer is undoubtedly positive. During early pilot programs using white roofing on buses, participating schools received a number of calls specifically noting that the buses were easier to see.

## What is a 8D battery?

Group 8D batteries are some of the largest 12-volt batteries available to consumers and usually have rough dimensions of about 21″x11″x10″ (LxWxH). These batteries typically weigh between 130-180 pounds, have a capacity of 230-300 amp-hours, and can provide upwards of 1,500 cold-cranking amps (CCA).