Suntide

Pricing

Two plans. One month free. No card.

The trial is the full Optimise plan for 30 days, with no card. You pick a plan on day 30, or do nothing and it stops.

Watch

£3.99/month

See it and check it.

  • Your system read every five minutes, whoever made it
  • An alert when something is wrong: an offline inverter, a missed cheap window
  • A monthly statement of what your system earned
  • Every electricity bill checked against your own readings

Pick Watch if you want to know it is working.

Start free trial

Optimise

£7.99/month · £79/year

Fix it and run it.

  • Everything in Watch
  • 27 checks, priced at your rates. Each with the fix. Each fix verified
  • Tomorrow’s plan, priced, on your phone tonight
  • Suntide plans each night. After 7 nights in shadow you can let it steer: it applies its plan to your inverter itself, tells you what it changed, and you can pause it at any time. Grid events, the inverter clock and car protection run on their own once you switch them on. Where an inverter does not take changes from outside, you make them in its own app with Suntide's steps.
  • Paid grid events, accepted only when they pay
  • The battery guard: an electric car never drains your battery

Pick Optimise if you want the bill to go down. £79 a year is two months free.

Start free trial

Suntide Link

£29 · estimated, one-off

Your inverter, read at home.

  • A small device that reads your inverter over your own network
  • Monitoring that keeps working whatever happens to a manufacturer's cloud, or its pricing
  • Some inverters need an adapter or cable as well; we tell you which before you order

In development. Account holders hear first when it ships. More about the Link

The trial is the full Optimise plan for 30 days, with no card. You pick a plan on day 30, or do nothing and it stops. Prices include VAT.

Every statement prints what Suntide cost beside what it earned. If the second number is not bigger, cancel from Settings. No call, no form.

Which plan fits

You want to know it is working

Pick Watch. Five-minute readings, alerts when something is wrong, a monthly statement and every bill checked. Nothing is ever changed on your inverter.

You want the bill to go down

Pick Optimise. The checks find what your set-up is costing you and price each problem. The plan is drawn every night. After 7 nights in shadow you can let it steer, and grid events pay you when the grid needs power.

You already tuned it yourself

Run Optimise in shadow. It publishes what it would have done each night and what that would have saved, measured against what you did. If your own schedule wins, you will see that too. Then decide.

What you keep

  • Your tariff, from any supplier.
  • Your inverter and its own app.
  • Home Assistant, if you run it. How the two fit.
  • The switch. One pause stops every change.

What you stop doing

  • Typing your rates in again when they change.
  • Wondering whether last night's schedule took.
  • Checking bills by hand, or not checking them.
  • Noticing the inverter's clock is an hour out in November.

Before you pay anyone anything

You have spent thousands on the kit. These are the questions worth asking.

My inverter app already does this for free. Why pay?

Your inverter app shows what happened. It does not price it. Suntide runs checks against your own tariff and puts a cost on each problem it finds. It checks every bill against your own readings. It draws tomorrow’s plan tonight, priced. Then it sends a monthly statement you can check against your meter. Your app keeps working alongside.

Will this affect my warranty or my installer’s settings?

Suntide changes only what you could change in the maker’s own app. It uses the manufacturer’s platform, with a key you issue and can revoke. Where an inverter accepts changes, Suntide can set the charge and discharge schedule and the charge current, and keep the clock correct. It never touches grid protection or safety settings. Every change is shown to you first, read back from the inverter, and recorded. When you leave, Suntide puts your own settings back. Some manufacturers restrict third-party control, so check your warranty terms. On an inverter that does not accept changes, Suntide only reads.

How much will I actually save?

It depends on your tariff and your current set-up. A well-tuned home may gain little from scheduling and still gain from bill checks, alerts and grid events. That is why the trial is free and the statement prints what Suntide cost beside what it earned. If the second number is not bigger, cancel.

What happens to my system if Suntide goes down, or the company folds?

Nothing changes at home. The schedule lives on your inverter, so your system carries on with its last plan. There is no box to remove. You hold a pause switch that stops every change. Your data exports in one step, and deleting your account puts your own settings back first.

What data do you hold, and who can see it?

Suntide holds your readings, your tariff, your bills’ figures and your home’s location for weather. Inverter keys are encrypted and never shown again. Suntide never asks for your inverter password. The main database is in London. There are no trackers and no advertising. The privacy policy names every provider.

Why pay £79 a year when Octopus does it in the tariff?

On a supplier-controlled tariff the supplier decides when your battery charges and sells. You take the result. With Suntide you keep any tariff from any supplier. You see the plan before it runs. You hold the switch. And your bills are checked by someone who is not the one sending them.

I already run Home Assistant. Why would I hand this over?

You do not have to. Keep Home Assistant. Suntide adds what it does not do. A statement checked against your meter. Bill checks. A record of what each plan would have saved, before you trust it. The Suntide Link has an open Home Assistant integration that reads your inverter locally every second. The Link is in development.

Find out what your set-up is costing you

Thirty days of the full Optimise plan. No card. About ten minutes to set up.