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SolarEdge 25,000W Three Phase Inverter D4 with DC Safety Unit and fuses NO DISPLAY (Pack of 3)
SolarEdge 25,000W Three Phase Inverter D4 with DC Safety Unit and fuses NO DISPLAY (Pack of 3)
SolarEdge 25,000W Three Phase Inverter D4 with DC Safety Unit and fuses NO DISPLAY (Pack of 3)
SolarEdge Three Phase Commercial SE20K – SE33.3K — 20 kW to 33.3 kW, with integrated Type II DC surge protection as standard.
This listing is a pack of 3 of this inverter, priced for installers buying in volume. Everything below describes the unit itself.
Please read before ordering
About the SolarEdge Three Phase Commercial SE20K – SE33.3K
This is SolarEdge's core commercial three-phase range and the one that turns up on most UK industrial roofs in the 20 kW to 33 kW band. It runs at a fixed 680 – 1,000 V operating window with a 1,000 V maximum, which gives long strings and 98.3 % peak efficiency.
Two things distinguish it from the ranges below. Type II DC surge protection is integrated and field replaceable as standard, not an option — on an exposed commercial roof with long DC runs, that is the component that quietly earns its keep during a summer storm. And the optional DC Safety Unit provides 1,000 V / 48.25 A two-pole disconnection with optional 25 A or 30 A single-pole DC fuses inside the same enclosure.
Rapid shutdown is available as an option, triggering automatically on AC grid disconnect. Combined with SafeDC at the optimiser and integrated arc-fault protection, that gives a DC safety story most commercial insurers are comfortable with.
String design, certification and what is in the box
The details that decide whether this unit suits the job:
- Requires SolarEdge power optimisers on every module.
- 1,000 Vdc maximum, 680 – 1,000 Vdc operating window.
- Type II DC surge protection integrated and field replaceable as standard; AC Type II optional.
- Optional DC Safety Unit: 1,000 V / 48.25 A two-pole disconnection, optional 25 A / 30 A DC fuses, UTE-C15-712-1 compliant.
- Optional rapid shutdown (part numbers SExxK-xxRxxxxxx), automatic on AC grid disconnect.
- Two RS485 ports plus Ethernet; Wi-Fi and cellular optional.
- Note for German sites under VDE-AR-N-4110: the SE33.3K counts as a 30 kW inverter for site capacity, and current limits differ — check the datasheet footnotes.
Where this inverter earns its place
The Three Phase Commercial SE20K – SE33.3K is specified most often for these jobs.
Can I add a battery to this?
This is a grid-tied PV inverter. It converts solar DC into AC for the property and the grid, and it has no battery port. That is not a shortcoming — it is the right architecture for a system without storage, and it is why it costs what it does.
If storage is on the roadmap, you have two routes. Add an AC-coupled battery system alongside this inverter later, which works with any PV inverter and needs no change to what is already installed. Or choose a hybrid inverter now and pay for a battery port you will use in a year or two. We are happy to talk that trade-off through before you order.
Things worth knowing about this listing
- The SolarEdge SetApp mobile application is required to commission this inverter. There is no display; commissioning is done from a phone over the inverter's own Wi-Fi access point.
SolarEdge SE25K technical data
Ordered with this inverter more often than anything else
An inverter on its own rarely completes the job. These are the parts our customers add most often:
Questions we get asked about this inverter
Is DC surge protection really needed?
On a commercial roof with hundreds of metres of DC cable, yes. Induced surges from nearby lightning are a leading cause of inverter failure on large arrays. Here it is fitted as standard and it is field replaceable, so a hit costs a part rather than an inverter.
What does the DC Safety Unit include?
Two-pole DC disconnection rated 1,000 V / 48.25 A, with optional single-pole 25 A or 30 A DC fuses, integrated into the inverter enclosure and compliant with UTE-C15-712-1.
Do I need optimisers?
Yes, on every module.
Can I export limit?
Yes, export limitation is part of the smart energy management feature set, and G99 is on the certification list.
What is the warranty?
12 years standard, extendable to 20.
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 inverter range and our solar panels, or email our sales team at sales@clearraysolar.com if you would like us to check a string design or a compatibility question before you order.
Three figures govern it, all in the Technical Specifications: the MPPT voltage range, the maximum input voltage and the maximum DC power. Tell us which panel you're pairing it with and we'll confirm the string layout.
G98 covers installations up to 3.68kW per phase and is notified to your DNO after commissioning. Anything larger needs G99 approval agreed beforehand. We can flag which one your design falls under.
A hybrid inverter takes a DC-coupled battery directly. A standard string inverter needs an AC-coupled battery alongside it. The Technical Specifications show which type this unit is.
Yes, up to the maximum DC power figure in the specifications. Modest oversizing is normal practice - it lifts output in winter and at either end of the day, at the cost of brief clipping at midday peak.
An MPPT tracks the optimum operating point for a string of panels. You want one per roof orientation or pitch, because panels facing different directions on a single tracker drag each other down.
The standard manufacturer warranty is listed under the Warranty tab. Extended cover is available on most brands - see Warranty Extensions.
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.
