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Apartment energy storage

Backup for your flat. Sized to your flat.

A wall-mounted Nano keeps your essentials, and one room cool, running through every cut. Whether it fits your building is a site question, and we answer it with a survey, not a promise.

  • Wall-mounted, no plant room or floor space given up
  • Silent sealed LFP, nothing the society can object to
  • Essentials plus one room AC, sized at the survey, run from GridOS
Nano on a flat utility wall

ASSET TBD

7:42 PM, a Tuesday

You know this evening. The grid drops, and the flat starts losing things one at a time.

The cut lands.

The inverter picks up two fans and the lights drop to half. The room goes quiet in the wrong way.

The call goes with it.

The router blinks out. The work call you were on is gone, and so is the next twenty minutes finding signal on your phone.

Hour two, warm.

The fridge has been off since the lights went. By the time power is back, what was cold is a question.

A flat does not need a generator. It needs a few circuits that never notice the cut.

What it runs

The circuits you actually miss in a cut.

The Nano carries your essential circuits and typically one room AC. The exact set, and how long it holds, is confirmed against your meter and load at the survey.

Lights
Fans
Wi-Fi & router
Phones & laptops
TV & entertainment
Water pump
One room AC
Door & alarm

If the society buys, the lift lobby and common lights can ride through cuts too. The exact set on your flat is confirmed at the survey.

The product

The Nano, on a wall you already have.

One sealed unit, wired to your essential circuits. No reconstruction, no dedicated room, nothing diesel on the balcony.

Mounts on a wall you already have

A utility wall, a service balcony, or a passage nook takes it. No plant room, no floor space sacrificed, no balcony given up to a genset.

Silent and fume-free in a society

Sealed LFP, no combustion, no exhaust. Nothing the neighbours hear and nothing the RWA can object to the way they would a diesel set.

Run the whole thing from GridOS

State of charge, the reserve held for the next cut, and outage alerts, live on your phone. The platform is live, not a roadmap promise.

Removable, so it stays your asset

Wall-mounted and uninstallable, not a built-in. If you rent or move, it comes with you. A clean remount is covered at the survey.

A day with it

The battery has a brain. You watch it work.

GridOS decides when to charge, when to hold back, and what to tell you. It is included on every Nano, not sold as a subscription.

Overnight

Charges when power is cheapest

GridOS tops the battery up on the lowest-tariff hours, so what backs you up later cost the least to store.

Afternoon

The cut hits, you get a heads-up

Your phone tells you the grid dropped and the flat switched over. The fridge never noticed. Neither did the router.

Night

Holds a reserve for later

It keeps enough back for the cut that tends to come at night, instead of spending everything the moment the sun sets.

GridOS — one day on the phone

ASSET TBD

Live build: phone pins, screen shifts with the time of day

The fit

Whether it fits is six questions, not a guess.

Apartment backup is a site problem, and we treat it like one. These are the things a survey checks before anyone quotes you a number.

Phase

Single phase or three. It sets which class fits and how your circuits split for backup.

Sanctioned load

What your connection is rated for caps what we can back up without tripping the supply.

Mount location

The utility wall, balcony, or nook the unit sits on, and the cable run to your panel.

Ventilation

Sealed and quiet, but it still needs air. We confirm the spot stays within temperature.

Society approval

Most RWAs treat it like a sealed appliance. Where an NOC is asked for, we prep the paperwork.

Panel separation

Which circuits move to backup and which stay on the grid, wired so only the essentials draw on a cut.

Six questions, one survey visit, all answered before you pay anything.

Likely sizing

Most flats run on a Nano.

A typical flat sits on the smallest class. A large three-phase flat may step up to a Micro. The exact unit, and how long it holds your circuits, is set at the survey, not on this page.

Typical for an apartmentGridEnergy NanoGE 5x5S
5 kW / 5 kWh

Class capacity, from the SKU name

Essentials + 1 room AC

What it typically backs up

Confirmed at survey

Backup duration

Confirmed at survey

Install time

Capacity shown is the class figure read from the model name. Backup hours depend on which circuits you carry and your usage, so we hold them until the survey rather than print a number that will not hold.

Apartment questions

What flat owners ask first.

The objections specific to living in a society, answered honestly.

The Nano is sized to carry your essential circuits and typically one room AC. Whether that is your bedroom or living-room unit, and for how long, is confirmed against your meter and load at the survey before you commit.

It is wall-mounted and compact, designed for a utility wall, a service balcony, or a passage nook. No plant room, no sacrificed floor space, no balcony given up to a genset.

The Nano is wall-mounted and removable, not a built-in like a fixed inverter bank. It can be uninstalled and remounted if you move. At the survey we cover what a clean removal looks like so it stays your asset, not the flat's.

A society DG runs the common areas and a few points, on diesel, when it starts. The Nano backs up your flat's own circuits, silently, the instant the grid drops, with no fuel cost per hour. It can sit behind a building DG or replace a personal one.

It is silent and fume-free with no genset, so it raises none of the noise or exhaust objections a generator does. Most RWAs treat it like any sealed appliance. Where an NOC or intimation is asked for, we hand you the spec sheet and help with the paperwork at the survey.

Six things: your phase, your sanctioned load, where the unit mounts, ventilation, society approval, and how your backup circuits separate from the rest. Six questions, one visit, all answered before you pay anything.

Exact years and cycle terms confirmed before you sign.

More resources

What it costs

We quote a fixed number, after we have seen your flat.

No price tag on this page, and no estimate over the phone. Cost for an apartment turns on three things, and all three are answered at the survey.

How much you back up

A few essential circuits costs less to cover than essentials plus a second AC. Capacity follows your load, and price follows capacity.

How hard the install is

A short cable run to a clean panel is one thing, a long run or a panel that needs rework is another. The survey sees which yours is.

Subsidies you qualify for

Where a solar-linked or state scheme applies, it comes off the top. We check eligibility at the survey, we do not assume it on a webpage.

Indicative pricing and payback math go here once real models exist. Held until sourced.

Three visits

From enquiry to your app, in three visits.

1

Free site survey

We read your meter, map your essential circuits, and pick the mount point. We flag the society documents you will need before we quote.

2

Right-sized proposal

One Nano sized to your circuits, the honest economics, and a fixed quote. No upsell to capacity a flat does not need.

3

Single-visit install & app

Authorised install and commissioning, then GridOS set up on your phone the same day.

Apartment survey + install visual

ASSET TBD

Book a survey

Sixty seconds now. A sized answer for your flat after.

Tell us the basics and what you want kept on. We read the rest off your meter at the visit. The survey is free and there is no obligation to buy.

  • We call you within 48 hours, not a sales loop
  • We flag any society paperwork before we quote
  • The quote is a fixed number, after the survey

Optional, each one sharpens the survey

We call you within 48 hours. No spam, no sales-call loop.

Confirm the fit for your flat.

The survey is free, the sizing is honest, and we help with the society paperwork. No obligation to buy.