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Sunsynk Sun 5K ECCO Hybrid Inverter
Sunsynk Sun 5K ECCO Hybrid Inverter
Sunsynk Sun 5K ECCO Hybrid Inverter
Sunsynk ECCO SG04LP1 — Charges and exports at the same time — the reason the 3.6 kW ECCO takes a 7 kWp array.
A hybrid inverter does three jobs a string inverter cannot. It converts solar DC to AC; it charges and discharges a battery on the DC side, which avoids the double conversion an AC-coupled battery pays for; and when the grid fails it islands the house and keeps the essential-load output alive from the battery.
About the Sunsynk ECCO SG04LP1
The ECCO's trick is that it can generate and charge at once. On the 3.6 kW the datasheet allows 7,000 W of PV against a 3,680 W export limit, so on a bright day the unit exports its full allowance while the surplus goes into the battery instead of being clipped. That is what makes it the answer for a large roof on a constrained grid connection.
Sunsynk build these around two output terminals rather than one: an essential-load output that stays live in a power cut, and a non-essential-load output that does not. That split is why the range is specified so often for houses that actually want to keep working through an outage rather than merely to store cheap electricity.
Which battery does this inverter take?
This inverter takes Low voltage, 40 – 60 V, lead-acid or lithium-ion.
This model has a battery voltage window of 40 – 60 V, BMS communication over RS485; CAN.
This rule applies to the Sunsynk ECCO, Classic, Acure and MAX single phase, and the SG04LP3 three phase.
Charging strategy self-adapts to the battery BMS. Maximum charge and discharge current is model-specific and runs from 70 A on the 3 kW ECCO to 290 A on the 16 kW MAX.
What we stock that fits this inverter:
String design, battery limits and what is in the box
The details that decide whether this unit suits the job:
- Battery is 48 V nominal, 40 – 60 V, lead-acid or lithium-ion, with a three-stage charging curve and equalisation, and the charging strategy self-adapts to the battery BMS.
- Maximum charge and discharge current is 90 A on the 3.6 kW and 120 A on the 5 kW.
- Two MPP trackers, one string each, 13 A per tracker and 17 A Isc. 500 V maximum, 125 V start-up, 150 – 425 V MPPT window and a 300 – 425 V full-load window.
- The datasheet gives the 3.6 kW a 7,000 W maximum DC input and the 5 kW 6,500 W — the smaller unit taking the larger array. That is what the document says; ask us to confirm it with Sunsynk before you design an array to that figure.
- Off-grid peak is twice rated power for 10 seconds.
- Maximum continuous AC passthrough is 35 A on the 3.6 kW and 40 A on the 5 kW.
- Up to 16 units with the same firmware can be paralleled.
- 330 × 433 × 238 mm, 11.4 kg on the 3.6 kW and 14 kg on the 5 kW, IP65, convection cooled at under 30 dB.
- The datasheet prints a 99.90 % European efficiency, which is higher than its own 97.60 % maximum and cannot be right, so it is left off this page.
Where this hybrid earns its place
The ECCO SG04LP1 is specified most often for these jobs.
Things worth knowing about this listing
- Comes with a Wi-Fi logger and a CT clamp.
- Compatible with most lithium-ion and lead-acid batteries.
- Up to 16 units running the same firmware can be paralleled.
Sunsynk SUN-5K-SG04LP1-EU technical data
Ordered with this inverter more often than anything else
A hybrid is the middle of a system, not the whole of it. These are the parts our customers add most often:
Questions we get asked about this inverter
Can it really charge and export at once?
Yes, and that is the point of it. The 3.6 kW exports up to 3,680 W to the grid while the rest of the array charges the battery, so a roof much larger than the export limit still earns its keep.
Which battery does it take?
Any 48 V nominal battery inside 40 – 60 V, lead-acid or lithium-ion, with the charging strategy self-adapting to the BMS. Check the current Sunsynk battery compatibility document for your exact model before ordering.
What will the backup output run?
Whatever is wired to the essential-load terminal, up to rated power, with twice that for ten seconds while a motor starts. The non-essential terminal goes dead in an outage, which is how the battery is made to last.
Is there a hardware difference between SG01LP1 and SG04LP1 stock?
No. Sunsynk update the firmware remotely after installation. The notes on this listing say which stock we are shipping.
How many can I parallel?
Up to 16, provided every unit is on the same firmware.
Documents, advice and trade pricing
Every datasheet, certificate, installation manual and warranty document we hold for this product is in the Documents tab below. See the rest of our hybrid inverter range, our batteries and our solar panels, or email sales@clearraysolar.com if you would like us to check a battery pairing or a string design before you order.
Build your complete solar system
Everything you need in one place.
- Inverters
- Batteries
- Mounting Systems
- Cabling & Accessories
- Protection Devices
Delivery times vary by region:
- UK — 1-2 business days
- Highlands & Islands — 1-2 business days
Returns accepted within 14 days of delivery for unused items in original packaging.
