Sunsynk Sun 5K ECCO Hybrid Inverter

Sunsynk 5kW ECCO Hybrid Solar Inverter, 6.5kWp Dual MPPT

The Sunsynk 5kW ECCO is the larger of the two ECCO models we hold, and it is specified less for its extra 1.4 kW of output than for what sits behind it: separate essential and non-essential load outputs, a zero-export function, and the ability to take power from the grid, a generator or even a wind turbine as well as the array.

That makes it the one to reach for when a property has loads worth keeping alive in a cut and loads that can be dropped, or where generation is coming from more than one place. Up to 16 batteries can hang off a single unit, and up to 16 inverters can run in parallel on matching firmware.

ECCO 5kW at a glance

What's in the box

From the parts list in Sunsynk's ECCO SG04LP1 user manual, revision v23, the copy attached to this product. The Wi-Fi data logger and the CT sensor clamp are both included, which on most inverters at this output are bought separately.

Essential and non-essential loads

This is the feature that separates the 5 kW from the smaller ECCO in practice. The inverter has two load outputs. The essential one stays live from battery and solar when the grid drops; the non-essential one is shed. In a power cut the fridge, the boiler controls and a lighting circuit keep running while the shower and the oven do not, instead of the whole house fighting over a 5 kW budget.

Zero export is built in too, so where the DNO will not allow any power back onto the network the inverter can be set to generate for the house only.

Panels, strings and other sources

Two trackers, one string each, 13 A apiece, working from 150 V to 425 V with a 500 V absolute limit and a 125 V start-up. Maximum PV input is 6.5 kWp – note that is lower than the 7 kWp the 3.6 kW model accepts, so if the roof is the constraint rather than the output, check which way round you actually need.

Beyond the array it will take the national grid, a generator or a wind turbine, and manage the flow between them. Off-grid it delivers twice its rating for 10 seconds for motor start-up, and with the grid present 40 A passes straight through to the loads.

Grid approval

Batteries

Any 40–60 V battery, lithium or lead-acid, and Sunsynk support most lithium brands rather than only their own. High-voltage batteries will not work – the Sunsynk HV range and its BMS need an HV inverter. A single ECCO will take up to 16 batteries, so a stack can grow a long way past the first unit.

Warranty

Five years as standard. Register the inverter with Sunsynk once it is commissioned and file the confirmation with the handover pack – registration is a separate step from the purchase.

Order alongside

• Sunsynk 10.64kWh W10.6 Battery

  The size that suits a 5 kW inverter on a normal house. IP65, cable sets included.

• Sunsynk 5.32kWh W5.3 Battery

  The smaller unit, and the one to add a second of later rather than replacing.

• Sunsynk Battery Wall Mount Bracket

  Wall-hangs the battery next to the inverter rather than standing it on the floor.

• Sunsynk SDM120CT-M Single-Phase Meter

  For export limiting under G100, where the DNO caps what may go back to the grid.

• Sunsynk Klik Device

  Lets two different batteries share one inverter, for topping up a stack years later.

Alternative sizes

Sunsynk make the ECCO SG04LP1 at 3, 3.6, 5 and 6 kW, all single phase on 48 V batteries and sharing this case and manual. We stock the 5 kW here and the 3.6 kW.

• Sunsynk 3.6kW ECCO Hybrid Inverter

  Smaller output but a larger 7 kWp array, and the only ECCO that stays inside G98.

In the newer Acure range the equivalents are the Acure 5.0 kW, with a built-in logger and arc-fault detection, and the Acure 8.0 kW where 5 kW is not enough.