TECHNICAL SERVICE OPERATIONS

MAS005188 MTB 26-02
Technical Bulletin
FROM: Maserati TSO
TO: Maserati Network

Cold Weather Guidelines for BEV Vehicles
DATE: June 16, 2026
This Technical Bulletin provides technicians and service personnel with a clear overview of
expected BEV behavior in low ambient temperatures. It explains key system characteristics,
including battery thermal management and EV Routing, and helps ensure accurate, consistent
communication with customers when cold‑weather concerns are reported. A customer
information handout is also included with this bulletin for distribution as needed.

Applies to all Maserati Folgore BEV models operating in cold climates.
Objectives
•

Explain why cold weather reduces estimated range and public DC fast-charging speed for BEVs.

•

Clarify on how Maserati systems mitigate these effects (battery thermal management,
EV-Routing with predictive pre-conditioning).

•

Help staff distinguish normal, temperature-driven behavior from conditions requiring diagnosis.

Guidelines for Dealer Personnel
•

Proactively set expectations with Folgore owners in cold climates regarding winter impacts
on range and charging speed.

•

Encourage use of EV-Routing embedded into Navigation (MIA) System prior to charging to
enable battery pre-conditioning.

•

When a customer reports a concern, use the decision flow below to separate normal behavior from
a potential malfunction; document findings and escalate to Technical Support as needed.

Condition / Customer Concern
Customers may report one or more of the following during winter operation:
•

Reduced estimated range versus WLTP-based expectations. (Worldwide Harmonized Light
Vehicles Test Procedure)

•

Slower DC fast-charging sessions, particularly when arriving with a cold battery or without
EV-Routing.

This bulletin addresses expected operational characteristics in low temperatures. It does not
supersede diagnostic routines for DTCs or system faults. If a customer’s concern appears
inconsistent with the above behaviors, follow standard diagnosis and escalate when necessary.

© 2026 Maserati Americas.
Aftersales
www.maseratiusa.com

MAS005188

All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA

Page 1 of 3

1. Low-Temperature Effects on Estimated Range
•

WLTP testing is conducted at approximately 23 °C (73 °F). Real-world deviation increases
significantly as temperatures fall.

•

In freezing conditions of 0 °C (32 °F), Folgore models may experience an approximate 35%
reduction in real-world range compared to WLTP-based expectations.

•

At −7 °C (19.4 °F), reductions may reach approximately 55% depending on driving and HVAC
usage.

•

Contextual factors such as winter tires, maximum defrost settings, or dense urban driving can
increase the reduction.

Why This Happens
•

Battery cell chemistry is less efficient at low temperatures.

•

Additional energy is consumed to heat the cabin and maintain battery temperature.

•

More energy required = less energy available for propulsion.

2. Low-Temperature Effects on DC Fast-Charging Speed
•

A cold battery cannot accept high charging power. Charging remains limited until the battery is
warmed.

•

Battery Thermal Management and EV-Routing pre-heat the battery before arrival at a
charger, reducing charging time.

•

Without pre-conditioning, charging times can increase by over 100% in extreme cold.

•

Pre-conditioning consumes approximately 10% of battery energy before arrival so that the
battery reaches the charger at the correct temperature for maximum charge power.

•

More energy required = less energy available for propulsion.

•

Actual results vary based on temperature, charger capability, and SOC window.

Service Information & Diagnostic Guidance
1. Verify Operating Conditions
Record ambient temperature, HVAC usage, tire type, and drive cycle. These significantly influence
range and charging times.

2. Confirm “EV Routing 2.0”
Please refer to the Maserati Intelligence Assistance (MIA) Manual for details:
Connectivity Mode → Maserati Guide & Drive Services → EV Routing 2.0

Ask whether the customer set the charger as the destination in the Maserati navigation
system. Without this, the battery will not pre-heat.

3. Compare to Expected Cold-Weather Performance
•
•
•

At 0 °C (32 °F) → approximately 35% range reduction may be normal.
At −7 °C (19.4 °F) → approximately 55% reduction may be normal.
DC fast-charging times can double or more without pre-conditioning.

4. If Behavior Appears Abnormal
Perform a full inspection and open a BOL if needed for further assistance.
© 2026 Maserati Americas.
Aftersales
www.maseratiusa.com

MAS005188

All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA

Page 2 of 3

TECHNICAL SERVICE OPERATIONS

Operational Description

Q: Why does my range drop so much when it’s below freezing?
A: Batteries are less efficient in the cold, and the car uses extra energy to heat the cabin and
battery. That combination lowers real-world range compared with warm-weather or lab
values.
Q: Why was my fast-charge so slow today?
A: If the battery is cold or you didn’t use EV-Routing to pre-heat the battery, the car must
warm the pack before it can accept high power—this extends charging time.
Q: Does pre-heating waste energy?
A: It uses about 10% to warm the battery, so you arrive with a bit less charge—but your stop is
faster overall, especially in very cold weather.
Q: Are my results normal?
A: At approximately 0 °C, range can be roughly 35% lower; around −7 °C, about 55% lower
(driving patterns, tires, and HVAC use matter). If your results seem far outside this, schedule a
check.

© 2026 Maserati Americas.
Aftersales
www.maseratiusa.com

MAS005188

All rights reserved. Reproduction or translation in
whole or in part is not permitted without
authorization from the publisher. Printed in USA

Page 3 of 3

TECHNICAL SERVICE OPERATIONS

Quick FAQ for Customers