About solarprod

Find the best electricity plan for your solar set up

Comparison sites match you to an average household. Once you’ve got solar and a battery you’re not average. What you buy from the grid is whatever’s left after your roof and battery have done their bit, and that changes which plan wins. So we don’t guess:

• We check every residential plan published for your postcode, straight from the Government’s Consumer Data website. A comparison site that shows you six plans is showing you the six that paid to be there. There are often over 80 plans for a postcode. We compare them all.
• We run a full year of your own system on each one to find the best way to store and export electricity every day, for a full year of the real weather at your house. Your roof, your panels, your battery, your usage, priced at that plan’s real rates.
• You get three numbers for every plan: what it costs if you work the battery, what it costs if you just let it self-consume, and the difference.
• The top picks are emailed to you and the full ranking comes as a spreadsheet, so you can check our maths.

That third number matters more than you’d think. A plan with scary peak rates can be your cheapest option if you have a battery to sell into those peaks. And the plan that looks cheap on paper can turn out worse than the one you’re already on. You pay us, so the electricity companies don’t get a say about who ends up on top.

Know what you can run today

Use too little and your spare solar goes to the grid for cents. Use too much and you’re buying it back at peak rates at 6pm. A battery only helps if you know how far you can run it down. We tell you before you flick the switch:

• Whether today’s power production covers your EV, the air-con, or three loads of washing.
• How much battery you’ll have left by tomorrow morning.
• What each choice is worth in dollars, from selling into the evening peak price to keeping some in reserve in case the power goes out.

Get paid like a VPP without handing over the keys

A virtual power plant pays you to let someone else run your battery. The money’s good but the catch is they choose when it charges and when it empties, and you find out afterwards. We give you the money part without the catch:

• We can plan your week for you. When to charge, when to hold, when to sell at the best price.
• The plan is built from your roof and your weather for every hour and each day of the year. Most VPPs run a whole fleet off the electricity price and never check whether your place will be under cloud at 3pm.
• One press writes our plan to your own inverter as ordinary timers that tell your inverter when to import and when to export.
• Change or delete any of it whenever you like. Timers you set yourself stay exactly where you put them. Timers from your plan are labelled, so you know which ones the next plan will replace.
• You can automate this so that your plan is updated every morning with the latest weather forecast.
• No contract, no aggregator, and nobody deciding your battery is needed somewhere else at 6pm.

Weather changed? Refresh the plan with one press. Everything works today with Tesla, Deye and GoodWe inverters. With Sungrow and Victron inverters we can read your solar and battery data, so your forecasts and history work, but we can’t set timers on them yet. We’ll add more inverters as our users ask for them.

And more

• Our system automatically recalibrates itself from the power you produce during the day.
• We automatically detect when your panels are shaded by trees, hills and buildings, and we adjust our predictions accordingly.
• We detect if your panels have got a bit dirty and could use a clean.

Cut your emissions, not just your bill

The grid isn’t equally dirty all day. On a still evening it’s running on coal and gas. At midday it’s full of everyone’s solar. So a kilowatt-hour you export to the grid at 6pm saves a lot more than the same one at noon. Switch to lowest CO₂ and we run your battery against carbon instead of cents:

• Your stored sunshine gets spent in the grid’s dirtiest hours, where it does the most good.
• Spare solar always goes out to the grid instead of being wasted, because your export is power somebody else doesn’t have to burn coal for.
• You still see the dollars. It’s the same simulation on your real tariff, so you know what the greener plan costs or saves before you pick it.

See if you could live without the grid

We play a real year of weather over your roof, hour by hour and day by day, carrying the battery through each night. You get:

• The days you’d have run out, and by how much. One bad day is what a battery is for. Four grey days in a row need a generator. We use real weather from recent years to tell you when this is likely to happen.
• A calendar of the whole year, so you can see whether it’s a winter problem or just the odd bad day. They need different fixes.
• What a generator would cost you. When to start it, how long to run it, and roughly how much petrol you’d get through in a year. We say roughly because we have never checked that number against a real jerry can. A second calendar shows the thirsty days.
• More panels, a bigger battery, or a generator? Try different solutions for your location and weather and see what works. Worked out for your situation, not from a rule of thumb.

Still on the grid and curious? Try it on your current setup. If you like what you see, we’ll help you set the place up properly off-grid. Nothing you’ve already saved gets touched.

Plan a trip or a week off-grid

Off-grid is where the budgets are the tightest and mistakes cost the most. A caravan running its air-con flat out can flatten a 200 Ah battery before sunset. Before you go, you can:

• See which stops on your route get enough sun for what you run, and which ones need a powered site or the generator.
• Compare the panels on your roof with folding portable ones, for where you’re actually going rather than a national average.
• Decide each morning whether the air-con can run all afternoon, or whether to top up from shore power first.
• Size the setup before you buy it: battery, panels, and enough spare for a cloudy week in winter.

The further out the forecast, the wider the range we give you, so the answer stays honest about what it knows. “18–24 kWh on Wednesday, 80 % confidence” beats one number pretending the weather is sorted.

Who we are

Two people who wanted this tool to exist, went looking for it, could not find it, and ended up building it.

• Co founder and CTO: Professor Martin Sevior
• Co founder and Head of Design: Nicky Sevior

Contact

Questions, feedback or a feature you wish we had: [email protected].

Stuck, or found a bug: [email protected].