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Battery storage, Dorset and Hampshire

Home battery storage across Dorset and Hampshire

The EcoFlow OCEAN 2: keep your daytime solar for the evening and the lights on in a power cut. From 5 kWh, with EcoFlow’s 15-year warranty, installed by MCS-certified engineers. With or without solar.

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EcoFlow OCEAN 2 battery and inverter on the wall of a house at dusk
The EcoFlow OCEAN 2: inverter and battery modules stacked on the wall, outdoors or in a garage.Image: EcoFlow
What you get

The part of a solar system that most people are missing

A 4 kW system on a Christchurch roof makes about 3,400 kWh a year, most of it between ten and four while the house is empty. Without a battery that electricity leaves for 8p a unit and comes back at 27p in the evening. A battery is the difference between those two numbers, every evening of the year.

We lead with the EcoFlow OCEAN 2 because it is modular, it backs up the house in a power cut, and EcoFlow stands behind it for 15 years in writing. Where a different brief suits it, we fit Alpha ESS instead. A battery also works on its own: charging overnight on an off-peak tariff suits plenty of homes in Southampton and Poole that do not have the roof for solar.

Included in every install

Free survey
When you use electricity matters more than how much. We look at both before recommending a size.
EcoFlow OCEAN 2
5 or 8 kWh modules, expandable to 48 kWh. 15-year warranty on the battery and the hybrid inverter.
MCS-certified install
Installed and commissioned by MCS-certified partner engineers to the current battery standard.
Backup, if you want it
Protected circuits chosen at the survey and wired on the day, so the lights stay on in a power cut.
Tariff set-up
Scheduled to charge cheap and discharge at peak on a time-of-use tariff. Done at handover.
0% VAT
Home batteries are zero-rated until 31 March 2027, with or without solar.
The numbers

Why the evening is where the money is

8p

what exported solar is worth

A typical Smart Export Guarantee rate. Your surplus leaves the house for this.

27p

what you buy it back for

The same unit, at six in the evening, from the grid.

15 yrs

EcoFlow warranty, battery and inverter

EcoFlow’s published warranty on the OCEAN 2 5 kWh module and inverter, with cells rated for 10,000 cycles.

Import and export rates are the house assumptions used across this site. Warranty and cycle figures are EcoFlow’s published specifications.

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What we supply

Batteries we fit

One we lead with, one we reach for when the brief suits it. Neither is a package: the size is set by when you use electricity, not by what is in stock.

EcoFlow OCEAN 2
5 and 8 kWh LFP modules stacked to 48 kWh on one inverter. 15-year warranty on the 5 kWh module and the hybrid inverter; 8 kWh module 10 years, extendable to 15. Backup switch-over EcoFlow rates at 0 ms.
Alpha ESS SMILE-G3
3.6 to 8 kW single-phase hybrid with LFP modules of 3.8, 8.2 and 10.1 kWh, stackable to 60 kWh. 10-year product and performance warranty, UK-based support.

Spec sheet

EcoFlow OCEAN 2

Capacity
5 to 48 kWhin 5 or 8 kWh modules
Cell chemistry
LiFePO4lithium iron phosphate
Cycle rating
10,000cycles
Battery warranty
15 years5 kWh module; 8 kWh 10, extendable to 15
Inverter warranty
15 yearsEcoFlow hybrid inverter
Backup switch-over
0 msconditions apply
Hybrid inverter
3 / 5 / 6 kVAup to 12 kW of panels
Mounting
Wallgarage, utility, outside

EcoFlow’s published specifications and warranty terms for the OCEAN 2 range. Confirmed for your model at the quote.

Featured: EcoFlow OCEAN 2

The battery that takes over when the sun goes down

Most solar is made while the house is empty. Without a battery it leaves for 8p and comes back at 27p. The OCEAN 2 keeps it.

Garage, utility room or outside wall: the batteries are IP66, the inverter IP65. A 5 kWh module is about 680 by 280 mm and 46 kg. Most homes start here.

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How it works

One point of contact. Certified hands on the roof.

One dedicated point of contact throughout. Carefully selected MCS-certified engineers do the installation. Nothing to pay until step three.

  1. Our team

    Step 1: A free survey, at home or on a video call

  2. Our team

    Step 2: A design and a fixed quote

  3. Partner engineers

    Step 3: Installation by MCS-certified engineers

  4. Our team

    Step 4: Handover, app set-up and the paperwork

Also from Proudly Powered

Usually fitted together

One survey, one design, one point of contact for all of it.

Straight answers

Battery questions from across the south

Not here? The number at the top reaches a person who can answer it.

Do I need solar to have a battery?
No. A battery on its own can charge overnight on a cheap off-peak tariff at around 7p to 9p a unit and run the house through the evening peak at 27p or more. The saving is smaller than with solar, but for a flat in Bournemouth or a house with a shaded roof it still works.
How long does an OCEAN 2 last and what is the warranty?
EcoFlow warrants the OCEAN 2 5 kWh battery module and the hybrid inverter for 15 years, and the 8 kWh module for 10 years, extendable to 15. The cells are rated for 10,000 cycles; one cycle a day is 365 a year, so the warranty, not the chemistry, is the limit. The inverter cover matters: on many systems the inverter is the part that fails first and carries the shortest warranty. Those are EcoFlow’s published figures and we hand you the warranty document at handover.
Will it keep my lights on in a power cut?
Yes, when installed with backup. The OCEAN 2 switches over automatically and runs lights, fridge, router, boiler controls and a TV for a full evening on 5 kWh. Backup circuits have to be chosen and wired at installation, so tell us at the survey that it matters to you.
Where does it go and how big is it?
A garage, utility room, or an outside wall. Each 5 kWh module is about the size of a large suitcase and can be wall-mounted or floor-stacked. It is not installed in a bedroom or on an escape route.
Can I add more capacity later?
Yes. The OCEAN 2 is modular: start at 5 kWh and add modules up to 48 kWh as your needs change. An EV, an extension or a heat pump later does not mean starting again.
Is lithium safe in my home?
The OCEAN 2 uses lithium iron phosphate, the chemistry chosen for home storage because it is thermally stable. It is installed by MCS-certified engineers to the current battery standard, in a suitable location, with the correct isolation and fire-rated fixings.
Does it work with Octopus tariffs?
Yes. It can be scheduled to charge in the cheap window of a time-of-use tariff and discharge through the peak. We set this up at handover and tell you which tariff suits how you use electricity.
How much can I realistically save?
For a working household with a 4 kW solar system, a 5 kWh battery typically lifts the annual saving from around £450 to £500 to between £650 and £850, by using your daytime solar in the evening instead of exporting it for 8p. Our calculator shows the difference for your bill.
Free survey, no obligation

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0333 188 0190

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