Store the daytime solar you currently export at 4–12p/kWh instead of buying it back at 24–30p+ after dark. Compatibility checked against EcoFlow’s list before you’re quoted, MCS-certified install.
The monthly electricity bill dropped from £600 to £24.79, around £6,900 saved a year, after the heat pump was also re-commissioned with the correct flow temperature.
“We’ve had very attentive customer service from Sean, and are very happy with the outcome of the installation of solar panels & batteries.”
Christine C., Gartcosh · Google review
The VAT cut runs to 31 March 2027 and covers retrofit storage, not just new installs. Paired with the Smart Export Guarantee, your evening usage starts coming off the top of the bill. Thinking about a heat pump next? Home Energy Scotland grants run to £7,500.
A lot of Scottish solar arrays went up during the Feed-in Tariff years, 2010 to 2019, on stone cottages, harled semis and rural properties running oil or LPG with no mains gas nearby. Those panels generate; they just have nowhere to put power that isn’t used the moment it’s made.
Every unused kilowatt-hour gets exported under the Smart Export Guarantee at 4–12p/kWh, then bought back after dark at 24–30p+/kWh, and that gap is where the money leaks.
A solar battery retrofit closes that gap without touching the array already on your roof, storing daytime generation for the early-morning and evening draw most Scottish homes have. If you don’t have solar yet, see our guide to solar panel installation across Scotland.
Scroll one day twice: what the grid sold you before the battery, and after. Same house, same weather.
Midday solar you do not use sells for pennies. At seven you buy it back at full price.
Watch the day before: quiet until everyone comes home, then the six o'clock spike, every single day.
A retrofit bank catches the midday spill instead of exporting it for pennies.
Same day, after: the spike is gone. The evening runs on your own afternoon.
Your panels stay. With a DC-coupled fit the inverter usually stays too. One bank, one day of fitting.
The retrofit bank
Your array, kept
Fitted beside the meter
Aventus Eco installs heat pumps, solar and battery retrofits across Scotland, and fits the EcoFlow PowerOcean DC Fit on arrays that are already up and running.
This page covers whether a DC Fit battery retrofit will work with the inverter you already have; for other EcoFlow PowerOcean options, see our full battery storage service.
DC Fit builds its own PV output on the DC side, so the inverter on your wall never has to know a battery was added.
EcoFlow rules out only a short list of inverters, and we check yours against it before you are quoted.
EcoFlow publishes no compatibility list for DC Fit, only a short list of what it doesn’t work with: if your inverter isn’t on it, it qualifies.
EcoFlow updates this list periodically, so we always confirm your exact inverter against their current version before quoting.
Most retrofit batteries in Scotland are AC-coupled, connecting at the consumer unit and needing new AC wiring. DC Fit is DC-coupled instead, wired inline between your panels and your inverter’s DC input: adding battery storage to an existing solar system without that AC rewiring.
That removes three jobs from the install:
Home Energy Scotland funds heat pumps, not solar batteries: two things genuinely apply here instead.
Storage turns your Smart Export Guarantee units into units you never buy back at the evening rate.
Exact cost depends on your storage needs and existing roof setup: your survey gives a written quote, and our breakdown of is battery storage worth it in Scotland covers the full payback maths.
We check your inverter against the DC Fit list, then survey your roof, solar output and usage pattern for a written quote, not a ballpark figure.
Working on the DC side, DC Fit retrofits skip the inverter swap and AC rewiring a standard battery install needs.
Store the solar you’re already generating instead of exporting it cheaply, then draw it down after dark instead of buying it back at peak rate.
Christine’s family home in Gartcosh, Glasgow was running up electricity bills averaging around £600 in some months, even though the property already had an air source heat pump. The heat pump had never been set up correctly and was consuming far more electricity than it needed to.
After a detailed survey and analysis of the family’s energy use, we installed a 10.5 kWp black bifacial solar PV array with 20.8 kWh of battery storage, and fully optimised the existing heat pump with corrected flow temperatures, system balancing, and control adjustments.
The monthly electricity bill dropped to £24.79, an annual saving of around £6,900. Most months, 100% of the family’s daily electricity now comes from solar generation and stored battery power.
“Excellent service before & after installation. We are also grateful for his knowledge and input into adjusting our heat pump and currently our bills are massively reduced.” Christine C, Gartcosh, ⭐⭐⭐⭐⭐
Yes, in most cases: the EcoFlow PowerOcean DC Fit adds a battery to your existing solar system without a new inverter. We check your inverter against the short incompatibility list before quoting.
Usually not with DC Fit: being DC-coupled, it sits inline between your panels and your existing inverter instead of connecting at the consumer unit. Most standard retrofits do need an inverter swap; this is the exception.
For an existing array, DC-coupled beats AC-coupled on disruption: no new inverter, no AC rewiring, faster on site. AC-coupled suits homes without solar; for a Scottish retrofit, DC-coupled is less invasive.
How much it costs to add a battery to your solar system depends on the capacity you need and your existing inverter and array. Retrofits qualify for 0% VAT until 31 March 2027; your survey gives an exact quote.
No: Home Energy Scotland funds heat pumps, not solar PV or battery storage. 0% VAT and Smart Export Guarantee income are the real savings levers for a battery retrofit.
For most FIT-era Scottish installs, your Feed-in Tariff payments are based on what your panels produce, not on what you do with that power, so adding a battery doesn’t typically affect your FIT income.
Yes, that’s common on rural Scottish properties that went solar between 2010 and 2019. Panel age isn’t the limiting factor: inverter compatibility is.
A DC Fit retrofit is typically faster than a standard battery installation, since there’s no inverter swap and no AC rewiring involved.
A few details is all it takes. We reply within one working day, with a real engineer, not a call centre.
We’ll check your inverter, explain your options, and leave you to decide.
