How it works

How ChargeSync optimises your home

Your battery shouldn't just store electricity. It should buy, hold, use or export power at the right moment. ChargeSync makes that happen, automatically.

Get ChargeSyncSee homeowner savings
1

Connect your battery, solar and tariff

Link your hardware and supplier, live today with Tesla, GivEnergy, Solax and Hinen (more added), on any tariff: flat, Economy 7, time-of-use or fully flexible. It takes minutes; no engineer.

2

Forecast

Three live streams: tomorrow's half-hourly prices (Agile, Flux, Cosy + day-ahead), hyper-local weather and solar, and your household's own demand, retrained nightly.

3

Optimise

A linear-programming solver computes the cheapest plan across tomorrow's half-hours, when to charge, hold, use or export. Provably optimal under the forecast, not yesterday's timer rule.

4

Control & report

It dispatches the plan automatically. You can watch your savings build day by day in the app, and each month we reconcile the total against the £10 subscription, if it doesn't beat the fee, it pauses while we re-tune.

Better than a timer

Optimisation isn't a schedule. It's sat-nav for your energy.

A timer follows yesterday's rule. ChargeSync re-routes every half hour: prices are published a day ahead and change every 30 minutes, solar changes with the weather, evening demand spikes, and power is sometimes cheap or even negatively priced. ChargeSync looks ahead and picks the cheapest way to run your home, automatically. Half-hourly optimisation needs a time-of-use tariff to bite, anything from Economy 7 through to a fully half-hourly tariff like Octopus Agile; the finer your tariff's time pricing, the more ChargeSync saves.

The savings ladder

Same kit, used progressively smarter

What a home could save each year on top of the solar and battery already fitted, as the same system is used more intelligently. Illustrative estimates for a 10 kWh battery, your figure depends on your home, tariff and usage.

Passive, battery + solarJust stores excess solar
baseline
Scheduled, battery + solarWhat manufacturers call “optimised”: solar-first, fixed peak-time timer
+£150
ChargeSync, battery only, tiered tariffIntelligent off-peak / peak (e.g. Economy 7)
+£350
ChargeSync, battery + solar, tiered tariffIntelligent solar use, price- & forecast-aware battery
+£450
ChargeSync, battery + solar, fully flexible tariffIntelligent half-hourly optimisation, advanced modelling
+£900 to 1,400

Don’t be fooled: a battery maker may say a system is “optimised”, but a fixed timer can’t react to weather, prices or your demand, so the bigger savings don’t follow. Some batteries come “optimised” the way a sandwich comes “gourmet”.

Illustrative figures for a typical 10 kWh solar-and-battery home on a flexible half-hourly tariff (around 10p off-peak, 24p by day, 40p at peak). What you actually save depends on your home, your tariff and how you use power.

FAQ

Frequently asked questions

Is this just a timer?
No. A timer follows yesterday's rule. ChargeSync re-optimises around tomorrow's prices, weather and demand, using accurate household-level forecasting.
What does it optimise across?
Import and export prices, weather, solar generation, household demand, battery state and constraints, and your preferences, with EV charging and heat-pump demand increasingly added.
Which tariffs do you support?
All of them. ChargeSync works on whatever tariff you're on, flat-rate, Economy 7, time-of-use or a fully flexible half-hourly tariff like Octopus Agile. The more flexible your tariff, the more we can save, but you don't need to switch to benefit, and we'll never push you onto a tariff that isn't right for you.
Will it support EVs and heat pumps?
Yes, these are further controllable loads on our roadmap, optimised within the same whole-home plan.

See what your home could save.

£10/month, 30 days free. Works with your battery and solar on any tariff, flat, Economy 7, time-of-use or fully flexible.

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