HUA-X battery project reference / Milan province, Italy

Two Wall-Mounted Batteries Raise Solar Self-Consumption at a Milan Villa

A four-person household near Milan paired 10.24 kWh of PowerHom storage with its existing solar array, increasing self-consumption from 32% to 78% and reducing the annual electricity bill to €740.

Two wall-mounted HUA-X batteries and an inverter in a Milan home garage. — Illustrative project scene.

Solar production and household demand occurred at different times

A detached villa built in the 1970s already had 5.4 kWp of rooftop solar. Much of its generation arrived while the family was away: around 70% was exported at €0.09 per kWh, while electricity bought later cost €0.29 per kWh.

The household wanted to use more of its own daytime generation in the evening. Backup capability was an additional objective, but the regular mismatch between generation and demand drove the everyday operating strategy.

10.24 kWh installed in the garage

Two PowerHom-5W wall-mounted batteries were connected in parallel to provide 10.24 kWh at 51.2 V. They were installed in the garage, approximately 1.8 m from a 6.2 kW hybrid inverter, with CAN communication between the equipment.

The operating sequence prioritised direct solar use, charged the batteries with surplus generation and discharged them in the evening. Each battery weighed 53 kg and measured 640 × 420 × 156 mm; the installation was completed by two people in an afternoon.

More solar used at home

Solar self-consumption increased from 32% to 78%. The annual electricity bill fell from €2,180 to €740, and the household's net expenditure after the project subsidy was €1,690.

During winter conditions of approximately 3°C outdoors, the garage remained around 8°C. The garage provided a more sheltered operating environment than the outdoor air, while the battery's daily use followed the household's demand pattern.

Project FAQ

Questions about this project reference

Configuration, application and operating conditions for this project.

Why were two wall-mounted batteries useful for this household?

The two PowerHom-5W units provided 10.24 kWh to move daytime solar generation into the family's evening demand period. The benefit came from that timing mismatch: much of the solar output had previously been exported while the family was away. Battery capacity alone does not create a benefit if there is little surplus solar or later household demand.

Does the battery determine the home's available AC output?

The batteries store DC energy; the connected hybrid inverter supplies AC power to household loads. This project used a 6.2 kW hybrid inverter with CAN communication. Load power, battery discharge limits and inverter compatibility all matter when selecting a similar arrangement.

Would another home obtain the same bill reduction?

This household's annual bill fell from €2,180 to €740 after solar self-consumption increased from 32% to 78%. The result reflects its demand pattern, solar production and purchase/export prices. The subsidy and the household's net project expenditure also belong to that installation rather than a current offer for every buyer.

Plan a similar battery project

Discuss storage for evening household demand

Share the application, destination, operating requirements, quantity and schedule to discuss a configuration for your project.

Request a Project Quote PowerHom-5W 51.2 V / 5.12 kWh Wall-Mounted Home Battery

Response target: within 12 hours. Supply scope, documents, lead time and warranty are confirmed with the quotation.