Mixergy Solar X 2.0 Indirect Standard 550mm Cylinder | Embedded PV Diverter Boiler Cylinder 150-300L

Description

The Mixergy Solar X Indirect Standard combines a boiler-fed primary coil with a factory-fitted embedded PV diverter, so solar surplus is diverted into the immersion backup element automatically alongside heating from a gas, oil or LPG boiler.

The 550mm standard case spans 150 to 300 litres across five SKUs, using the same 2.0 Controller and stratified thermocline smart charging as the standard Mixergy X Indirect range.

150–300L

Capacity Range

550mm

Diameter

Embedded

PV Diverter

18.3–23.6kW

Coil Rating

30W–3000W

Modulation Range

WiFi

App Connected

Please Note: Current Lead Times

Mixergy cylinders typically ship on a 3 to 6 week lead time, depending on model and quantity ordered. Please call us to check current availability before confirming an installation date.

Good to Know: Solar Surplus, Automatically Used

The embedded diverter continuously modulates output between 30W and 3000W, matching the immersion load to whatever solar surplus is available at any given moment.

Important: Unvented Installation Requirement

This is an unvented cylinder. Installation must be carried out by a G3-competent operative and commissioned per the manufacturer's Installation & Servicing instructions. Incoming mains pressure must be less than 10 bar and at least 1 bar, with a minimum flow rate of 10 L/min. Unvented cylinders must never be used with a solid fuel heat source.

Factory-Fitted PV Diverter

The diverter ships embedded and pre-wired at the factory, cutting installation time and eliminating a separate wall-mounted diverter unit.

Boiler-Fed with Solar-Boosted Backup

Heated primarily via the internal coil from a gas, oil or LPG boiler, with the immersion backup topped up by diverted solar surplus.

Stratified Smart Charging

Thermocline sensors mean the controller only heats the volume of water required from the boiler coil, giving minimum reheat times as fast as 11 minutes.

550mm Standard Case

The full-diameter case gives maximum capacity per unit height, suiting cylinder cupboards without width restrictions.

High Coil Output

Coil ratings from 18.3kW to 23.6kW across the range support fast boiler-fed reheats even at the largest 300L capacity.

Safety-Certified Components

Factory-fitted monobloc cold water inlet control group, T&P relief valve (7 bar/90°C), and expansion vessel charged to 3 bar.

Embedded Solar Diverter

Thermostat cut-out temperature	80°C
Immersion heater(s) rating	230–240V~, 2.7–3.0kW
Immersion heater(s) specification	EN 60335-2-73
Immersion heater(s) type	356mm Incoloy/Ti
Modulation range	30W–3000W

Controller & Electrical

Controller generation	2.0 Controller
Electrical supply	16A, dedicated MCB-protected circuit
Adjustable temperature range (digital)	50–65°C
Connectivity	WiFi dongle (supplied) or hardwired Ethernet

Unvented Safety Components

Max. supply pressure to PRV	10 bar
Operating pressure	3 bar
Expansion vessel charge pressure	3 bar
Expansion relief valve setting	6 bar
T&P relief valve setting (pressure)	7 bar
T&P relief valve setting (temperature)	90°C
Coil max. working pressure	3.5 bar

Construction

Cylinder material	Stainless steel
Insulation type	CFC/HCFC-free polyurethane foam
Insulation thickness	50mm
Connection size/type	22mm compression
Coil max. working pressure	3.5 bar
Diverter valve (>70°C boilers)	Honeywell V4043H1056 2-port, or equivalent

Model Range

Model Code	Capacity	ErP	Height	Coil Rating	Weight Full	Min Reheat
MX-150-IND-550-PVE	150L	B	1117mm	18.3kW	178.2kg	11 mins
MX-180-IND-550-PVE	180L	B	1305mm	19.4kW	212.2kg	11 mins
MX-210-IND-550-PVE	210L	B	1493mm	19.9kW	245.2kg	12 mins
MX-250-IND-550-PVE	250L	C	1743mm	20.7kW	289.8kg	12 mins
MX-300-IND-550-PVE	300L	C	1989mm	23.6kW	344.6kg	12 mins

Please Note: Indirect Installations Over 70°C

Where the boiler or primary heat source is capable of exceeding 70°C, the supplied 2-port diverter valve (Honeywell V4043H1056 or equivalent) must be fitted, per the manufacturer's Installation & Servicing instructions.

How does the embedded PV diverter work alongside the boiler coil?

The boiler coil provides the primary heating; the embedded diverter separately routes solar surplus into the immersion element, modulating between 30W and 3000W.

Do I need a separate PV diverter unit as well?

No — the diverter is factory-fitted and pre-wired inside the cylinder alongside the boiler coil connections.

Can the Solar X Indirect be used with a heat pump instead of a boiler?

Yes. The controller supports a heat pump heat source setting in place of a boiler, with the PV diverter continuing to serve the immersion element.

What certification does the installer need?

Installation must be carried out by a competent operative who has completed a recognised unvented hot water systems course, with commissioning recorded per Building Regulations (G3) requirements.

What is included in the box?

Each cylinder ships with the monobloc cold water inlet control group, expansion vessel with mounting bracket, factory-fitted immersion heater(s), WiFi dongle, Ethernet cable, gauge, and user guide.

How long is the lead time and how do I check stock?

Lead times typically run 3 to 6 weeks depending on model and order quantity. Please call us to confirm current stock and expected delivery before booking an installation.

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