What is a solar power diverter?
A solar power diverter, also known as a photovoltaic (PV) immersion controller, is a smart device used with solar panels and a hot water immersion heater. It maximises the use of free and abundant solar energy by directing excess electricity generated by the panels to the immersion heater to heat water, rather than exporting it to the grid.
What if a solar power diverter kicks in at 70 watts?
If the Solar power diverter kicks in at 70 watts surplus PV output, this would not be enough to power the immersion heater, these heaters are rated at 3kW, so would consume at least 3000 watts therefore the extra 2930 watts will be dragged from the grid and electricity bills would be very large.
Do you need a solar power diverter?
With the high upfront cost of solar panels, a solar power diverter makes sure you get the most out of your solar power, so you don't have to rely on the grid as much for heating water. But bear in mind that it’s only useful if you've got an immersion heater. If you have no means of heating your water with electricity, a diverter will be useless.
How many kWh does a solar panel produce?
Determining exactly how many kWh a solar panel produces involves some straightforward calculations. Each panel has a wattage rating. For example, a standard panel may have a 300W power rating. This is the number of hours per day when sunlight is strong enough for the panel to produce its maximum power.
How much does a solar power diverter cost?
A solar power diverter typically costs between £300 and £500, which covers the cost of the diverter unit itself, along with the labour cost for installation.
Are solar power diverters cost-effective?
Lastly, while diverters are cost-effective, they don’t offer the same level of financial savings or energy independence as solar battery storage systems, which are a lot more flexible and can store excess electricity for use at any time of the day or night. How much does a solar power diverter cost?
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Solar power diverters: are they worth it? [UK, 2025]
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First things first, a 20 kW solar installation is BIG! The average home solar installation in the United States is 5.6 kW, so a 20 kW system is almost 4 times bigger!. If you''re interested in installing a 20 kW solar system, chances are this is a commercial installation or your electricity use is really high compared to the national average of about 900 kilowatt-hours per …
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