Power Systems

Know Your Options

Power is the heartbeat of your EMS vehicle. From life-saving equipment to climate control, it all runs on one of these systems. The question isn’t just “what’s best?” — it’s “what’s best for you?”

We’re here to help you cut through the noise and pick the solution that fits your operation, your budget, and your team.

Options at a Glance

Power System Comparison

Choosing the right power system starts with understanding what each option brings to the table. Below is a quick snapshot comparing the three primary systems we support.

hPower (Battery)

Idle Reduction

Operator Controlled

Automated (40–50%)

Upfront Cost

$$$

Annual Fuel Cost

$4,850

Negligible

40–50% fuel savings

Preventive Maintenance

Oil and filter change every 150 Onan hrs

Generator refurbishment every 2,500 engine hrs

Alternator replacement every 3–7 mo

Install Complexity

Easy

Moderate

Complex

Support & Documentation

Wide network

Limited

Typical Fleet Uptake¹

49% share

44% share

7% share

Time in Market

30+ years

10+ years

5+ years

Note: For comparison only. Actual costs and fuel savings will vary. ¹Based on 2023 customer selections

Which System Matches Your Mission?

Quick Comparison

Every EMS operation is different — urban vs. rural, high call volume vs. standby-heavy, budget-conscious vs. future-focused. That’s why no single power system is right for everyone.

hPower

Ideal if you need:

Silent operation (urban, standby, hospitals)

Lower fuel costs & emissions

Future-ready, advanced power tech

Considerations:

Limited field service familiarity

Alternator replacements required in high-use fleets

MEPS

Ideal if you need:

A balance of cost and fuel efficiency

Compact design that uses the chassis engine

Considerations:

Generator refurbishment required in high-use fleets

Onan

Ideal if you need:

Proven tech & national support

Field-replaceable & easy to service

Simple install and operation

Considerations:

Built-in idle mitigation

Higher fuel use

The Power of Choice

What Are Other EMS Agencies Choosing?

We support departments of all sizes — from high-volume metro systems to rural volunteer EMS — and every customer has different priorities. Here’s how power system choices broke down across recent Frazer orders.

Power System

% of Frazer Customers

Why They Chose It

Onan

49%

Proven reliability, ease of service, and broad mechanic familiarity

MEPS

44%

Lower fuel use, compact install, balanced performance

hPower

Quiet operation, idle-free, future-ready design

Note: These choices reflect operational preferences, not performance rankings. We support all three power options.

How Frazer Supports You

Ready to Talk Power?

Factory install, testing, and support

Lifetime service from the team that built your unit

Easy access to parts, training, and documentation

No-pressure help choosing what’s right for your mission

Let’s find the best system for your vehicle, team, and budget.

Know Your Options

Power System Comparison

Onan Generator

MEPS (Underhood)

hPower (Battery)

Quick Comparison

hPower

Ideal if you need:

Considerations:

MEPS

Ideal if you need:

Considerations:

Onan

Ideal if you need:

Considerations:

What Are Other EMS Agencies Choosing?

Ready to Talk Power?