Anhui Province, a township health center, 7:30 a.m. A white mobile DR examination vehicle is parked in the open lot outside the clinic. Technician Xiao Wang opens the door, presses the power switch - the equipment boots instantly, the X-ray tube warms up, and the battery indicator on the DR screen shows 100%. The first villagers lined up for their health check are already waiting, and Xiao Wang starts work right on time.

This township health center is a typical primary-care facility, serving over 20,000 residents across more than a dozen surrounding administrative villages. Like many such centers, it was equipped with a mobile DR examination vehicle in 2023 for rural outreach and community health screenings.

"The DR vehicle was allocated to us by the government - the equipment itself is advanced: digital radiography, automatic exposure control, all the right features," says Director Zhou, who oversees equipment at the health center. "But its power supply system has always been a weak link."

The vehicle came from the factory with a traditional lead-acid battery storage system. The drawbacks of lead-acid batteries are magnified many times over in mobile medical settings - too heavy, low capacity, slow charging, and rapid degradation.

"The most frustrating part is during rural outreach trips," says Director Zhou. "We drive the vehicle to a village, turn on the equipment, and after just a few exposures, it shows low battery. You have to stop and let the engine idle to recharge - sometimes for half an hour. Villagers are queuing up for their check-ups, and the equipment is down - that's really awkward."

Even more frustrating is the battery lifespan. Under frequent charge-discharge cycles and the vibration of driving, lead-acid batteries degrade very quickly - typically showing obvious deterioration after just over a year. The health center spends no small amount each year on battery maintenance and replacement.

In early 2025, the health center decided to carry out a comprehensive upgrade of the examination vehicle's power system. Through an open tender process, they invited proposals with several hard requirements: sufficient capacity to support a full day of rural outreach; absolutely reliable power delivery (medical equipment demands far higher power quality than ordinary appliances); and remote monitoring with intelligent management to track battery status and system health in real time.

After evaluating multiple options, the health center selected a combined Victron Energy + Wysher solution.

"Victron has extensive proven experience in the mobile medical vehicle space," says the system integrator responsible for the retrofit. "The mobile clinics in Ghana, Vanna's mobile medical consultation rooms in the US, Valley Hi-Tech's mobile diagnostic trailers - all use Victron solutions. Victron's MultiPlus inverter features pure sine wave technology, safely powering sensitive loads like computers and medical equipment; the Cerbo GX communication centre supports VRM remote monitoring, so the hospital can see the real-time status of every examination vehicle from the office."

For energy storage, they chose Wysher's TU-MDR-L02 medical-grade LiFePO₄ batteries. "Wysher's batteries are specifically designed for medical applications," says Director Zhou. "48V, 54Ah, LiFePO₄ chemistry, over 3,000 cycle life, built-in smart BMS with five layers of protection. And they support CAN-bus communication, integrating seamlessly with Victron's Cerbo GX - all data flows through one unified platform."

The Final System Configuration

After on-site surveys and system design, the integrator delivered a complete Victron + Wysher energy storage solution for the health center's DR examination vehicle:

(Note: The above reflects the actual setup of the health center's examination vehicle. Two Wysher TU-MDR-L02 units in parallel provide approximately 5.2kWh of total storage. The MultiPlus pure sine wave inverter safely powers sensitive medical loads such as DR equipment. Cerbo GX enables remote monitoring via the VRM portal.)

The retrofit was carried out in the health center's parking lot. The original lead-acid battery compartment was emptied, and the two Wysher TU-MDR-L02 batteries were installed side-by-side in the existing chassis bay. The Victron MultiPlus inverter was mounted in the equipment cabinet next to the batteries - its pure sine wave output ensures power quality for the DR equipment: stable voltage and clean waveform, which are critical for the precise exposure of the X-ray generator.

600W of semi-flexible solar panels were installed on the vehicle roof, feeding the battery bank through the Victron SmartSolar MPPT 150/35 charge controller. The MPPT technology ensures maximum energy harvest from the PV array even on overcast or cloudy days.

For state-of-charge indication, the TU-MDR-L02 battery itself is equipped with a 4-5-segment LED bar indicator, with each segment representing roughly 20-25% capacity. Technicians can quickly assess the battery status at a glance - four bars lit means above 80%, three bars means 60-80%, two bars means charging is advised, and one bar flashing means recharge immediately. In addition, via CAN-bus communication, the BMS transmits SOC data to the DR equipment's main console, so an accurate remaining-charge percentage is also available on the device screen.

What pleased Director Zhou most was the VRM remote monitoring. The Cerbo GX uploads real-time system data to the Victron Remote Management platform via 4G. From his office, Director Zhou can open the VRM portal on a computer or phone and see the status of every examination vehicle - battery level, PV generation, system temperature, and even GPS location - all on one screen.

During Anhui's summers, the inside of a parked examination vehicle can often exceed 45°C. Previously, lead-acid batteries suffered noticeable performance degradation at high temperatures - lower charging efficiency and reduced discharge capacity. In contrast, Wysher's LiFePO₄ chemistry offers excellent thermal stability - the TU-MDR-L02's operating temperature ranges cover 0-55°C for charging and -20-60°C for discharging - well within Anhui's seasonal extremes.

Winter performance is equally reassuring. The monthly self-discharge rate is ≤3% (at 25°C), far lower than lead-acid's 15-20%. Even if the examination vehicle sits idle for a month, the battery charge barely drops.

What gives the greatest peace of mind is the MultiPlus's UPS function. When the vehicle is connected to shore power or a generator, the MultiPlus automatically switches and begins charging the batteries. The transfer time is under 20 microseconds - the DR equipment doesn't even notice the switch. Previously, with the lead-acid system, power transitions would occasionally cause equipment reboots; now that problem is completely resolved.

From an ordinary examination vehicle that spent half its outreach time waiting for power, to an intelligent mobile medical workstation that is "ready to scan on arrival, fully visible at all times" - this energy storage upgrade at a township health center is a successful real-world application of the Victron + Wysher combination in primary healthcare.

According to statistics, there are over 35,000 township health centers and community health service stations across China. As the tiered diagnosis and treatment system deepens and quality medical resources continue to move downward, mobile DR, mobile ultrasound, mobile examination vehicles, and similar equipment will become increasingly common. Reliable, long-life, remotely monitorable smart energy storage systems will be a critical component of primary-care capacity building. A dependable energy storage solution is essential for grassroots mobile medical services.