{ "id": 90015, "date": "2026-06-28T00:00:00", "date_gmt": "2026-06-28T00:00:00", "guid": { "rendered": "https:\/\/genixenergy.com.ua\/?p=90015" }, "modified": "2026-07-05T22:05:13", "modified_gmt": "2026-07-05T14:05:13", "slug": "dc-coupled", "status": "publish", "type": "glossary", "link": "https:\/\/genixenergy.com.ua\/en\/glossary\/dc-coupled\/", "title": { "rendered": "DC-coupled" }, "content": { "rendered": "

DC-coupled is a solar-plus-storage wiring configuration where solar panels charge the battery directly through a single DC conversion stage, so stored energy passes through only one DC-to-AC step before reaching household loads.<\/p>\n\n

Why it matters for home backup power<\/h2>\n\n

Every conversion step dissipates some energy as heat. In a DC-coupled system, the solar array, charge controller and battery share the same DC bus; the inverter converts DC to AC only once, at the output stage. Fewer conversions mean more of what the panels produce actually reaches loads or storage.<\/p>\n\n

This architecture also strengthens backup capability: when the grid fails, the panels can continue charging the battery directly through the DC bus without depending on grid-sensing circuitry in a separate inverter. The charging path stays intact in off-grid and island-mode scenarios.<\/p>\n\n

DC-coupled in practice<\/h2>\n\n

Key numbers<\/h3>\n\n

For energy planning, the canonical figures apply: about 85 percent of nameplate capacity is usable, reflecting a depth of discharge of 80 to 95 percent combined with one-way discharge and inverter efficiency of 90 to 95 percent. System-level round-trip efficiency (full charge plus discharge) is about 90 percent. DC-coupled architectures tend toward the favorable end of this range because the solar charging path skips the additional AC conversion that an AC-coupled<\/a> layout introduces.<\/p>\n\n

Actual backup duration is always load-dependent; a given battery capacity covers a much shorter window under heavy loads than under minimal lighting and networking loads.<\/p>\n\n

DC-coupled vs AC-coupled<\/h3>\n\n

The complementary topology is AC-coupled<\/a>, where a dedicated grid-tie inverter converts panel output to AC first and a separate battery inverter then converts that AC back to DC for storage. This two-conversion sequence accumulates additional losses relative to DC-coupled.<\/p>\n\n

DC-coupled suits new installations best: the hybrid inverter<\/a> and solar array are selected together and sized to a shared DC bus from the start. AC-coupled is the natural retrofit path when a grid-tie inverter is already in place and replacing it is not practical.<\/p>\n\n

A qualified electrician should design and connect either topology; both involve high-voltage DC and grid interconnection.<\/p>\n\n

How Genixgreen uses DC-coupled<\/h2>\n\n

Genixgreen hybrid inverters are built around a DC-coupled architecture: the MPPT<\/a> charge controller, battery port and AC output stage share a single DC bus, so solar energy flows into 51.2 V LiFePO4 cells rated for 6000+ cycles and from there to loads without any intermediate AC conversion. Every home and commercial system in the Genixgreen range follows this topology.<\/p>\n\n

Genixgreen has built LiFePO4 storage in its own factory since 2011 and ships to 100+ countries, with local stock in Odesa for delivery across Ukraine.<\/p>\n\n

Related terms<\/h2>\n\n