01664 822 499 info@carbonlegacy.co.uk

We can design and price a system to meet both your budget but more importantly your solar generation/export and home consumption..

The design will involve a site survey and getting you to provide meter readings to show how your pattern of usage varies or install a simple and inexpensive monitoring advice.

We will then match the battery solution to your new PV system or existing PV and demonstrate the likely savings.

Smaller systems will suit low electricity users (2,000-3,000kwh/yr) and fall in the range of 3-5kwh of useful daily storage.

Higher use households (4,000-10,000kwh/yr) especially homes heated with Heat pumps will benefit more from larger systems between 5-16kwh.

We can also design systems for small commercial or farm use such as dairy farmers where high daily electrical loads reduce ever declining profit margins.

Please take the time to watch some of the videos that demonstrate different solutions and then ask us for an informal free survey and quote.

We can provide both DC and AC connected systems. With battery systems connected on the AC side of the solar generation meter, your FIT meter readings will not be affected or reduced by using battery storage. If we had suggested a DC connected battery (before the PV inverter),   then any conversion losses in the battery system would reduce your FIT meter reading and resultant FIT payments.

There are system losses when using AC/DC/AC systems but as this is with energy that would have been sent to the Grid then the importance of conversion losses is not as critical. It is still worth choosing an efficient system so that on days when there is minimal solar surplus energy the battery system will take in and release as much useful energy as possible.

 

Summary of systems we support:
Existing PV installations Battery Sizes available AC/DC connection Inverter capacity Comment
Sonnen 2-16kwh AC 1.5-2.5kw Best quality available but

expensive

Victron & LG 3.3,6.5, 10kwh AC 3.3 & 5.0kw
BYD 2.5-80kwh AC 3kw Promising Chinese kit
Tesla Powerwall 2 13.5-135kwh AC 5kw Ground breaking kit and best

VFM available.

Many configurations 1 & 3 phase

Mercedes/SMA 2.5-20kwh AC 2.2-6kw Many configurations possible

1 & 3 phase Complex but reliable kit

LG.HV/SMA 7 & 9.8kw AC 2.5kw LG’s latest high voltage batteries
New PV installations with Batteries Battery Sizes available AC/DC connection Inverter capacity Comment
Goodwe & LG 6.5, 10, 13.3 & 16.5kwh DC 3.6 & 5.0kw Hybrid PV and Battery inverter
Solar Edge/LG High voltage 7 & 9.8kwh DC 3.68-6kw Only works with Solar Edge inverter/Optimisers
Off-grid installations with Batteries Battery Sizes available AC/DC connection Inverter capacity Comment
SMA Sunny Island & Sony 4.4 – 100kw DC To suit loads Tailored design to work with PV, Wind turbines and diesel generators
SMA Sunny Island & LG 6.5, 10, 13.3 & 16.5kwh DC To suit loads Tailored design to work with PV, Wind turbines and diesel generators
Tesla Powerwall 2 13.5-135kwh AC To suit loads Tailored design to work with PV, Wind turbines and diesel generators. Not available until 2018