TOPIC:

BATTERY PACKS VS INVERTERS

Cost Comparison of Battery Pack vs Inverters

The Basics

- Which One to Use

- Products We Are Comparing

- The Simple BOM Cost

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BATTERY PACKS VS INVERTERS

Installation & Maintenance

- Assumptions

- What are the "Real" Numbers?

- Maintenance Implications

Support Tools

- The One-Pager

- How to Get More Information

- What Factors Change the

  Conclusion?

I. THE BASICS

Which One to Use

BATTERY PACK

LED Emergency Driver

- Small Jobs with Very Few Emergency Fixtures

- High Electrical Labor Costs

- Simple Retrofit Applications

MINI INVERTER

125 / 250 Watts of Pure Sine Wave Output Mini Inverter

- Higher Fixture Counts, Larger Jobs

- Integration with Advanced Lighting Controls

- Lower Yearly Maintenance Cost

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BATTERY PACKS VS INVERTERS

What We Are Comparing

EMP

EMP 7 | EMP 12 | EMP 25

IMI

IMI 125 | IMI 250

E3

E3 300 | E3 500

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BATTERY PACKS VS INVERTERS

I. THE BASICS

Cost of Goods

COST PER FIXTURE

 

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BATTERY PACKS VS INVERTERS

I. THE BASICS

Installed Cost

II. INSTALLATION & MAINTENANCE

The Work Being Done Here is Different, in Practice

- Field-Wiring the EMP is Local to The Fixture, but has a Number of Terminations

If You Are Just Buying Parts & Field Installing, it is a Wash

- The Inverter Requires Fewer Wires, but Will Utilize a Separate Run of Conduit & a    Transfer Device

- Buying the EMP Pre-Installed from the Manufacturer

- Field-Wiring the Inverter

The Real Comparison is:

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BATTERY PACKS VS INVERTERS

The Assumptions

Getting to the "Perfect Number" Doesn't Exist...

- $125 Adder for Pre-Installation of the Battery Pack from the Fixture Manufacturer

- 1 ELCD Device per 10 Fixtures on the Inverter

- Labor & Materials for Installation Add Up to $40/Fixture

- Inverters Use Best Practice Loading

What We are Considering

- Project Management Costs of Having Different Fixture Types on Site

- Self-Documenting Features of the Inverter

What We are Not Considering

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BATTERY PACKS VS INVERTERS

II. INSTALLATION & MAINTENANCE

Total Installed Cost

 

COST PER FIXTURE

 

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BATTERY PACKS VS INVERTERS

II. INSTALLATION & MAINTENANCE

Maintenance Assumptions

These Assumptions are Even Harder to Deal With than the BOM Costs...

- It takes longer to travel between inverters than to go between emergency drivers

- Documentation takes more time than testing

- All inverters are self-diagnostic

- The labor rate for the person responsible for testing is $60/Hr

What We are Considering

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BATTERY PACKS VS INVERTERS

II. INSTALLATION & MAINTENANCE

Maintenance Cost

COST PER YEAR

 

EMP

E3 500

E3 300

IMI 250

IMI 125

FIXTURES

7W

12W

25W

$24

$1

$1

$1

$2

$24

$1

$1

$2

$3

$24

$2

$2

$3

$5

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BATTERY PACKS VS INVERTERS

II. INSTALLATION & MAINTENANCE

Where Does This Analysis Fall Apart?

Many Assumptions Can Change This Analysis

The maintenance part is stable and the relative values won't change much, the installed cost could change based on:

- More small zones could require more ELCD devices for control, driving                  the per-zone inverter cost up. Larger zones drive the inverter cost down.

- Labor rates have a more significant effect on inverters.

- We didn't cover it here, but the project management costs of battery                    packs is relevant. Having multiple fixtures that all look the same is challenging.

- Remember that inverters can also power exit signs and other non-lighting          loads. That heavily shifts the benefit to them.

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BATTERY PACKS VS INVERTERS

II. INSTALLATION & MAINTENANCE

The One-Pager

III. SUPPORT TOOLS

- PDF Will Be Sent Along with Course          Overview Email

- PDF Will Also Be Put on the EMP & IMI      Product Pages

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BATTERY PACKS VS INVERTERS

Need Further Assistance?

Team of Experts

Schedule a Factory Visit or Advanced Sales & Engineering Training

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BATTERY PACKS VS INVERTERS

III. SUPPORT TOOLS