The primary article can be found here:
https://www.renewsolar.co.uk/solar-kits/decoding-solar-price-vs-value-a-consumers-guide/
When looking into solar kits the prime reason as side from being green is the cost effective solutions and value, here at RenewSolar we take the matter very seriously making sure you get good value for money.
15kwh per day is not unusual for most family homes and therefore we have the 7kwh kit, which is a light use, and this amount of use being pretty average.
Powering your home with solar is a bit of a math magical nightmare due to a wide range of variables, but we are usually on the money when it comes to accuracy in our calculations. However there are a few ways to find the results. We know that we have a budget target of £7,533.75 for our ROI target.
To make the most of solar, the key parts will be the battery and the solar array but we are likely to see the inverter play a bigger roll. lets deal with the inverter first.
The inverter provides power up to its rated power, if you go over this output then you will be paying from the grid power to make up that short fall. Therefore it is key to understand this “price point”, as many homes can use around 4-5kwh around peak times, we would be looking at an inverter around 5.5kW. here we would use the sunsynk 5.5 ecco hybrid inverter.
Because this is above G98 spec pre approval is required for the installation under a G99 application.
Power Delivery.
Power from solar tends to be at the wrong time of the day when we need it. The math here requires that the solar meets the loads in the day and charges the battery for night use. this may seem simple, but as a general information post the work from home load can be greater during the day time hours which shifts the power delivery and storage during the whole day.
You may want to consider the grid charge periods and time frames, this can vary daily and will likely change with the seasons. This is where you could save by having a cheap rate time, where you charge the battery for £0.05kWh to be used at other times. The cheap rates could have a higher rate during peak times at around £0.40kWh.
With just battery charging at a cheap rate, you could be saving £5.25 per day, and from standard rate that would be a saving of £2.925 per day; That’s £1,067.62 per year excluding solar.
THE KIT:
10 Solar panels (5kw array – 6.5Kwp)
Rail and mounting kit.
Sunsynk 5.5kw hybrid inverter
PV Cable
AC Isolator
RCBO and enclosure.
2x 11.77kWh budget batteries (no longer available)
£4,540.80
This is clearly under the ROI target and allows for £2,992.95 installation budget or certain upgrades.
The system may peak in summer to produce 45kwh of solar power, though your more likely to see around 36.4kwh per day.
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