A great battery on the wrong tariff looks like a bad battery.
The tariff decides most of the saving. Cheap overnight hours, peak prices and what exports earn matter more than the kit alone.
Suppliers' quotes leave the battery out. They price last year's use, not the home with a battery and a car on it.
Customers call you, not the supplier. A disappointing bill turns into calls, reviews and refund requests months later.
Informal advice doesn't hold up. "Other customers went with this one" is a guess. Spark gives the answer in writing, from their own bill, under your logo.
How it works
Three steps. One clear answer.
- 1
Add the bill and the system
A photo of their latest bill (no bill? type the figures in), plus the battery, car and solar you're quoting. Their smart-meter file, if they have it, prices every tariff on their own half-hours.
- 2
Spark prices every tariff
Each supplier's own rates by time of day, standing charge and export payment, priced for how the battery and car will run. VAT at today's rate.
- 3
Send your customer their link
The tariff that suits, the top three side by side, and a link to sign up on the supplier's own site.
What we compare
Octopus Energy, EDF, E.ON Next, EnergyCoop, London Power, OVO Energy and So Energy, tariff by tariff.
Time-of-use and EV tariffs
Octopus Flux, Go and Cosy, EDF Go Electric, E.ON Next Drive and Smart Saver, and every other home tariff they publish for the region.
Prices that change every half hour
Agile is priced on its last 12 months of real prices, day by day, and shown with its range: never the recommendation, always explained.
Today's cost, even without a bill total
We take a standard variable tariff at Ofgem's price cap for the region, priced on the same use, and say so.
Who we don't compare yet
British Gas and ScottishPower don't publish their tariffs in a form we can read. Every answer says so.
Independent
Nobody pays us to recommend a tariff.
We take no commission or referral fee from any supplier, and the ranking can't see one. So when your customer asks “why this tariff?”, the honest answer is on the page.
Every assumption shown
Use, charging and exports, in plain words.
Can't be edited
The numbers your customer sees are Spark's.
The top 100, too
A spreadsheet of every close option.
Their choice
They sign up on the supplier's own site, or not at all.
Your next quote, with the tariff sorted.
From £6 a check, or £79 a month for 25. On Team or Pro, reserve the postcode districts around your base, up to 200,000 houses, for 12 months. Prices in pounds; no UK VAT added (reverse charge).