--- path: "/" locale: sv-se alternates: x-default: "/en-gb/information-resources/blog/zenerg-d-o-o-expands-pv-system-with-enphase-iq-battery-5p" en-gb: "/en-gb/information-resources/blog/zenerg-d-o-o-expands-pv-system-with-enphase-iq-battery-5p" title: "Zenerg d.o.o. Expands PV System with Enphase IQ Battery 5P | ESTG" description: "Discover how Zenerg d.o.o. expanded an Enphase PV system with 10 kWh storage in Croatia. Fast delivery and premium hardware via your personal account at ESTG." type: information-resource --- # ESTG ![Newsarticle image - ESTGeu (7)](https://a.storyblok.com/f/288569/2000x2000/44a381c06d/newsarticle-image-estg-eu-7.png) The introduction of the new net-billing scheme in Croatia and rising demand for energy independence are reshaping the residential market landscape. It is no longer just about generating solar power, but about smart energy management and maximum grid autonomy. Expanding an existing solar system requires solutions that integrate seamlessly and offer fast availability. Zenerg d.o.o. responded directly to these market demands on a residential project in Istria by expanding an existing Enphase microinverter system with two Enphase IQ Battery 5P units. The project at a glance: - **Location:** A private household in Istria, Croatia - **Existing system:** Enphase PV system with microinverters - **Battery system:** 2× Enphase IQ Battery 5P (10 kWh total capacity, 3-phase FlexPhase kit) - **Coupling & Communication:** Wall-mounted, AC-coupled, Envoy-S Metered, Enphase wired communication kit & 2× external 3-phase relays ## Integrated technology for a future-proof result In a recent field project at a private household in Istria, Zenerg d.o.o. brought this advanced configuration together. The system expands an existing Enphase microinverter installation with two wall-mounted Enphase IQ Battery 5P units. By selecting the 3-phase FlexPhase kit, the residence gains a generous storage capacity of 10 kWh. The AC-coupled batteries communicate directly with the gateway and operate in *Self-Consumption mode*, ensuring the home is also prepared for future backup power functionality. Jurica Brekalo Štrbić, founder and director of Zenerg d.o.o., explains the system choice and partnership: *"Our customers specifically request Enphase because of its quality. The biggest challenge for this project was sourcing the hardware quickly. ESTG resolved this with excellent availability, competitive pricing, and delivery arriving on site within a week."* The AC-coupled design of the Enphase IQ Battery 5P proved to be a major practical advantage. Thanks to seamless integration with the Envoy-S Metered and the wired communication kit, solar energy generated during the day is stored directly in the 10 kWh battery pack, preventing grid imports during evening and nighttime hours. ![Newsarticle image - ESTGeu (8)](https://a.storyblok.com/f/288569/2000x2000/37d144d937/newsarticle-image-estg-eu-8.png) ## Certainty and speed in delivering energy storage technology Adding battery storage to an existing solar energy system under the new Croatian net-billing regime requires reliable equipment and fast turnaround times. The Enphase IQ Battery 5P exceeded expectations during mounting and commissioning on 16 September 2026. Data from the Enphase app (recorded on 15 October 2026 at 21:10) illustrates the concrete results on a representative day: - **Total household daily consumption:** 10.1 kWh - **Grid import:** Only 0.4 kWh - **Battery discharge to home:** 7.0 kWh - **Battery charge from PV system:** 10.0 kWh Thanks to close collaboration with wholesaler ESTG, Zenerg d.o.o. quickly received the complete shipment—including the required communication kit, Envoy-S meter, and external relays—delivering a flawless project while strengthening its position as an Enphase specialist in Croatia. ### Ready to build next-generation energy storage solutions for your own projects? Log in to your personal account to view full technical specifications and reserve your stock directly. - [View Enphase range](/sv-se/marken/enphase)