Mongolia Solar System Project | 50kW PV + 100kWh Storage for Auto Repair Shop | JTHouse Solar

JTHouse Solar has completed a 50 kW solar + 100 kWh energy storage system for an auto repair shop in Mongolia. Built around JTHouse's three-phase integrated storage unit— a single cabinet that integrates the controller, inverter and storage pack— the system powers the workshop's heavy equipment, including the vehicle lift, welder and other high-power machines, while cutting a large share of the shop's monthly electricity cost.

The challenge

An auto repair shop is one of the most demanding loads for a small commercial PV system. The workshop runs high-power three-phase equipment all day — a vehicle lift, welding machines, air compressors and diagnosis equipment— so any power problem stops jobs on the spot and delays customer vehicles. At the same time, the shop faced rising electricity tariffs that pushed operating costs higher every month, and conventional solar-plus-storage installations involve multiple separate devices (controller, inverter, battery racks), which means complex wiring, longer installation time and harder maintenance.

The owner needed a system that could run heavy three-phase equipment reliably and cut electricity costs— without turning the workshop into a construction site during installation.

The solution: three-phase integrated technology

JTHouse Solar designed a 50 kW PV + 100 kWh storage system built around the JTHouse three-phase integrated storage unit. The rooftop array supplies the workshop during the day, surplus energy is stored in the 100 kWh battery pack, and the integrated unit manages PV, battery and grid automatically.

·Three-phase all-in-one design— controller, inverter and storage pack are integrated in a single cabinet, simplifying the installation process and reducing operation and maintenance difficulty

·Direct solar supply— daytime equipment loads are covered by PV first, cutting the amount of grid electricity purchased

·100 kWh storage— stored solar energy covers evening work and cloudy periods, further reducing grid consumption

·Clean, fast installation— one integrated cabinet replaces multiple devices and racks, minimizing on-site wiring and downtime for the shop

System highlights

The effect

·Much lower electricity cost— solar power replaces grid electricity for the daily workshop load, cutting a large share of the monthly bill

·Simplified installation and O&M— the three-phase integrated design removes the complexity of matching separate controllers, inverters and battery racks; one cabinet, one system

·Reliable power for heavy equipment— stable three-phase output keeps the lift, welder and compressors running through the working day

·Faster payback— every self-consumed kWh is a kWh not bought from the grid, accelerating the return on investment

Frequently asked questions

1. Why is a three-phase integrated system a good fit for an auto repair shop?

Repair shops run three-phase, high-power equipment such as lifts and welders. The three-phase integrated unit delivers stable three-phase output and combines the controller, inverter and storage pack in one cabinet — so the shop gets the power quality it needs with a much simpler, more reliable installation.

2. How does the system cut electricity costs?

During daylight, the 50 kW rooftop array supplies the workshop's equipment directly. Surplus energy is stored in the 100 kWh battery and used in the evening or on cloudy days. Because most of the load is met by self-generated solar power, the shop buys far less electricity from the grid — every self-consumed kWh is a cost saved.

3. Can the system handle high-power equipment like welders and lifts?

Yes. The system is designed around the shop's actual load profile, with stable three-phase output sized for the lift, welder, compressor and other high-power machines operating together during working hours.

4. How does the system perform in Mongolia's cold winters?

The integrated cabinet and lithium storage pack are specified for low-temperature operation, and the equipment is installed indoors in the workshop, protected from extreme cold. PV output is lower in deep winter, but the system is designed so the grid covers the difference while solar still offsets the majority of daytime consumption across the year.

5. Can the system be expanded in the future?

Yes. If the shop adds equipment or extends working hours, additional PV capacity and battery modules can be added to the existing integrated unit, protecting the owner's initial investment.