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How Many Solar Panels And Batteries Do I Need?

Are you presently considering adding a solar system to your home? With several homeowners in the UK using solar now, many more are realizing the numerous benefits they stand to derive by getting one. Therefore, if you’re thinking about adding the system to your home but do not know where to start, you’ve come to the right place.

Here, we’ll help you calculate the number of solar panels and batteries you’ll need to power your home. Starting from the panels, you can begin by taken into account everything that makes use of power in your home to get a good idea of how many you’ll need.

• Firstly, you’ll have to determine the number of watts you use. Simply go through your utility bill for kilowatt-hours (kWh). This varies amongst homes and being able to identify your daily average energy usage will assist you in getting your solar needs.

• Secondly, you have to determine the peak sunlight hours - having in mind that the solar panels only work when under direct sunlight. Once determined, you can then multiply the figure in hours by your home’s hourly energy usage and divide by your selected solar panel’s wattage.

Generally for a 1500 square foot house, you might need around 15 to 18 solar panels to cover the house’s electricity.

Meanwhile for batteries, there are also some factors to be considered to determine the number of batteries you’ll need for your house. These factors include your home’s power or electricity usage, the period of time in which the battery will be used as well as the battery’ specifications. Once done, you’ll be able to calculate the number of batteries required by your home.

The more you’re at home during the day, the more you can save on your electricity bill, since solar panels generate electricity during the day. The Feed-in Tariff scheme (FITs) ended in March 2019, but the new Smart Export Guarantee (SEG) pays you, via your energy supplier, for the electricity you export back to the grid. With the savings involved in generating your own electricity and SEG payments, you can expect to save up to £390 per year on your electricity bill.

When people think about heat pumps, they’ll automatically have the believe that a swimming pool will require a big heat pump. Since the swimming pool has a large volume of water, then warming such a volume will require a large ground source heat pump because that volume is much larger than the normal domestic hot water tank, right? Well, that point of reasoning does seem logical especially with the information almost everywhere that ground source heat pumps are usually less efficient when it comes to heating hot water for home’s use. However, the fact is there are also some things to put into consideration that also works in favour of the ground source heat pump.

First and foremost, you should know your domestic hot water will typically be heated to a much higher temperature when compared to your swimming pool. Since you wouldn’t be using the water to disinfect your bathroom or doing your dishes in your swimming pool, then the temperature can be much lower. In fact, it’s much more comfortable and enjoyable to heat to a typical “swimming pool temperature than having it at a hot bath temperature. If you’ve ever wandered into a really hot swimming pool, you wouldn’t need any introduction to the painful discomfort that comes next.

As a result of this low temperature, your “tiny heat pump can operate a in a more efficient way which makes the use of ground source heat pumps a viable swimming pool heating option. What’s more? The ground source heat pump works for a swimming pool just like any any other application - moving the heat from the region of a warmer temperature to the cooler temperature region.

Whether installing an air source heat pump will help you save money depends on your property, how long you expect to live there, and the type of heat pump you get.

Air source heat pumps are initially quite expensive to install. However, if you get an air-to-water air source heat pump, you’re eligible for money from the Renewable Heat Incentive [https://www.energysavingtrust.org.uk/scotland/grants-loans/renewables/renewable-heat-incentive] (RHI). This is a UK government scheme that gives you quarterly cash payments over seven years if you install an eligible renewable heating technology (air-to-air air source heat pumps aren’t included).

All this means that if you have long-term plans to stay in your property, then an air-to-water air source heat pump can be a great way to save money on your heating bills. However, if you’re planning on moving out of your property relatively soon, or are a considering an air-to-air air source heat pump, it may not be the best financial option for you.

It’s important to remember that air source heat pumps are at their most efficient when installed in very well insulated properties. If your property’s not very energy efficient, you may find that a heat pump won’t help you save money.

Solar thermal panels work by capturing heat directly from the sun and using it to heat water. This hot water is then passed through a coil to heat the water for your central heating system. Solar thermal systems are compatible with many existing conventional boilers with hot water tanks, and can be set up to feed in to your existing heating system.

The bigger the ground source heat pump, the better right? Wrong! And you’ll definitely be sorry to make such a huge mistake. When planning to install a heat pump, determining the size of the ground source heat pump is not as direct and straightforward as many homeowners would think. Here, you’ve got only a small margin for error. When the pump is too small, the heat pump will make use of the backup heater too often and in the event whereby the heat pump is too big, it’s going to short cycle. Both situations are preferably avoided as they’ll both leave you with an expensive and inefficient system.

To get the accurate size of a heat pump, there’s usually the need to hire the services of an expert and licensed heat pump installer who possesses a top notch design calculation software. In reality, the majority of inefficient systems are caused by a lack or poor understanding of the suitable design software.

There are many factors that can influence the calculation of a home’s heat pumps size. These includes

✓ Radiators and underfloor heating sizes

✓ Insulation, property fabric as well as heat loss

✓ The number of rooms in the property

✓ The types of rooms and their uses.

✓ The desired indoor temperature for varying rooms

✓ Seasonal temperature fluctuations.

Generally, a bigger house will require a bigger ground source heat pump. With an eye on the age of the property, heat loss as well as the types of the rooms, a house of about 100 square metre can require up to 4kW ground source heat pump. And for a house that’s about 200 square metre, the ground source heat pump also doubles to 8kW.

Air source heat pumps can be a really efficient way to generate heat. Although they require electricity to run, they generate much more heat than an electric heater that uses the same amount.

Air source heat pumps provide heat at a lower temperature than most other types of space heating. This means they’re most efficient when they’re left on for longer periods of time, and distribute heat through wet heating systems with large surface areas, like underfloor heating or big radiators.

Air source heat pumps can be much more efficient than oil and LPG boilers, and older electric heating systems. However, they’re only usually the most efficient option if your property is very well insulated.