Pure3 Energy Management System vs. Roadtrek/Hymer EcoTrek 400

Recently, Winnebago introduced the most powerful, durable, and easy-to-use lithium energy system in the industry, the Pure3 Energy Management System available in the Travato 59KL and 59GL. So we compared the new Pure3 Energy Management System to Roadtrek/Hymer’s EcoTrek 400 and we looked at available power off the inverter, voltage off the alternator, energy capacity, charging power and time, lithium ion type and expected life, and battery warranty. Winnebago Travato 59GL and 59KL

Available Power @ 120V Pure Sine: When comparing the available power, we are looking at power off the pure sine wave inverter. This tells how many amps users will get without being hooked up to shore power. The Winnebago Travato 59KL and 59GL provides 30 amps of available power, without being plugged into shore power, while the Roadtrek/Hymer Ecotrek 400 provides 17 amps of power. You will always be traveling with full 30 amp of service off the extremely powerful 3600-watt pure sine wave inverter. If you are looking to boondock, the Ecotrek is not going to be able to power your electronics and appliances for as long as the Winnebago Travato with the Pure3 Energy Management System.

Voltage: When looking at voltage, were comparing the Travato 59KL/GL’s second alternator to Hymer/Roadtrek’s second alternator or as they refer to it – “the underhood generator.” The Roadtrek/Hymer Ecotrek 400’s second alternator is a 12 volt while the Travato 59KL and 59GL with the Pure3 Energy Management System has a 58-volt second alternator, twice as powerful as the Hymer and Roadtrek Ecotrek 400! The Travato’s second alternator has an extremely compact design that keeps it out of the way of curbs and road debris.

Energy: Comparing Winnebago’s Pure3 Energy Management System’s energy capacity to the Roadtrek and Hymer Ecotrek 400’s reveals a rather large discrepancy between the two. The Roadtrek Zion EcoTrek 400 provides 4,800 watt-hours while the Winnebago Pure3 Energy Management System provides 8,700 watt-hours.

You might be wondering if watt-hours are really that important? Yes, they absolutely are. A Watt Hour is a unit of measurement for power over a period of time, in our case an hour, and is a way of measuring capacity. One watt-hour is equal to one Watt of average power flow over an hour, so one Watt over 10 hours would be 10-Watt Hours. Volta, the company that partnered with Winnebago to build the Pure3 system, has a power calculator on their website and showed what the run times for the Pure3 System would be. If you were boondocking (not hooked up to shore power) and you were not collecting any energy from your solar panels and you wanted to run your air conditioner all day (at 50% duty cycle), run your compressor refrigerator all day (at 50% duty cycle), binge watch your favorite show on your big screen HDTV for six hours and have every single light in your coach on you would have to recharge in 10.73 hours. The Roadtrek and Hymer Ecotrek 400 couldn’t come close, since their battery pack is nearly half as powerful.

Charging Power and Time:

Time is of the essence for RVers needing to charge their lithium system. Both the Roadtrek/Hymer EcoTrek 400 and the Winnebago Pure3 Energy Management Systems will recharge from the second alternator. If you recall, the Roadtrek/Hymer EcoTrek 400 has a 12-Volt alternator while the Pure3 has a 58-Volt alternator. The Roadtrek/Hymer EcoTrek 400 has 3,500-watts of charging power off the 12-Volt alternator while the Pure3 Energy Management System has 6,000-watts of charging power off the 58-Volt alternator. The Pure3 Energy Management System can also completely recharge the battery approximately 1.4 hours while the recharging time of the Roadtrek/Hymer EcoTrek 400 is unknown.

Lithium Ion Type and Life:

With top performance and safety as uncompromising goals we developed plug-n-play scalable systems using high-density, nickel manganese cobalt batteries. These outperform “consumer-grade” lithium ion competitors with about two times the effective storage and take up one third the space of AGM lead acid batteries. What’s more, they’ll last the lifetime of a vehicle, service anywhere and can withstand cold storage.

Under 200-lbs. the Travato’s Pure3 Energy Management System three-module, automotive-grade energy pack providing 8,700 Whrs. The energy pack is watertight and durable, the steel housing is the safest on the market. The Roadtek/Hymer EcoTrek 400 is a consumer-grade lithium ion battery with far less storage capacity as the Travato’s.  The Pure3 Energy Management System lasts the lifetime of the vehicle and has been tested. Its expected life is 10 years/2000 cycles at 80%. The expected life of the Ecotrek 400 is unknown.


The Roadtrek and Hymer have an impressive six-year warranty on their lithium ion system but the Travato’s Pure3 Energy Management System has an industry-leading 8 year warranty on the battery which was designed to last a lifetime.

Winnebago’s new Pure3 Energy Management System is an industry leader and is superior to Hymer and Roadtrek’s Ecotrek 400. See our entire Travato inventory  and learn more about the Winnebago Travato here.