Duo 890W hybrid · house wall
The Back Wall Kit: Duo 890W on Your House Wall
Two 445W panels on a hybrid stand, fixed to the back wall of your own house once a professional has assessed it. Up there, they clear the yard wall's shadow and catch sun the flags never see.
Why the house wall beats the yard floor in most terraces
A terrace yard is a box with a wall round it, usually about head height. When the sun's low, that wall throws a shadow across the flags for a good chunk of the day.
Lift the panels up the house wall and they look straight over it. They're also out of the way of the bins, the bike and next door's football.
The outrigger counts too. Its side wall is a wall of your house, and on a lot of streets it's the sunniest one in the yard.
What's in the Back Wall box
- 2 × 445W TOPCon N-type panels (bifacial, glass-glass)
- 1 × APsystems EZ1-M 800W microinverter
- Hybrid aluminium mounting frame with ballast brackets, for a wall or the ground
- 4m AC cable and 2m DC extension cable
Ballast isn't included. You'd only need it if you stand the kit on the floor instead.
The professional wall check, and what it looks at
The maker requires a professional assessment before any wall, flat-roof or raised install. We don't do assessments or fitting ourselves, so you'll book a qualified professional, and do it before anything is fixed to the house.
Expect them to look at things like:
- that it's a wall of your own house, not a boundary or party wall
- the state of the brick and the mortar, and the right fixings for it
- how exposed the wall is to the wind, and the height the kit will sit at
- cladding and render (timber, ACM, MCM or HPL cladding rules a wall out)
- where the outdoor socket will go, within the kit's 4m lead
In England a kit on a house wall has to stay within set limits, can't go on a street-facing wall in a conservation area, and isn't allowed on a listed building. Check with your council if you're not sure.
Plug in, register, switch on
- 1Get the wall assessedAnd the stand fixed the way the professional advises.
- 2Register it freeAt myplugin.solar, before first use. That tells Electricity North West.
- 3Plug inThe 4m lead goes straight into your weatherproof outdoor socket. No extension leads.
- 4Switch on and watchYour house uses the power first. The microinverter's app shows what it's making.
Back Wall Kit numbers
- Panels
- 2 × 445W
- Most it sends into your home
- 799VA
- Where it goes
- Wall or ground
- Space needed
- 3.7m × 1.2m
- Panel weight
- 25.5kg each
- Box size
- 1750 × 1165 × 240mm
- Box weight
- 74.5kg
- Checks first
- Needed for any install that isn't on the ground
- Price
- Price TBC
From the maker's datasheet (September 2026). Every spec on the kit page.
Measure up before you order
- About 3.7m × 1.2m of sunny wall on your own house: the back wall, or the outrigger's side wall.
- Clear of windows, doors, gutters and downpipes.
- A weatherproof outdoor socket within the kit's 4m lead, with modern RCD protection.
- Room to get a 1750 × 1165 × 240mm box, 74.5kg, through the front door and hall.
- Narrower wall? The Compact 515W hybrid needs about 2.0m.
Join the list for the Back Wall Kit
It's not on sale yet and the price isn't set. Leave your email and we'll tell you when you can order.
- Duo 890W, hybrid mount
- Price TBC
- Dispatch
- Date to be confirmed
Can it go on the wall at the bottom of the yard?
No. That wall is almost always the boundary with the entry or next door. House walls only.
My back wall's narrower than 3.7m. Now what?
The Compact 515W hybrid kit needs about 2.0m. Or try the outrigger's side wall.
Will the neighbours think I've lost the plot?
They'll more likely ask where you got it. It's two tidy black panels on the back of the house, facing the yard.