There are two main types of solar panel batteries; lithium Ion and lead acid. Lithium ion are smaller and more efficient and are often used for domestic properties attached to the grid. Lead acid are larger, slightly cheaper and less efficient, usually used in off grid scenarios.
If you need advice on the battery solutions available to you get in touch.
An AC coupled battery is installed outside of the DC circuit. This means that there will be an inverter to convert solar production from DC to AC and another inverter to convert from AC to DC to store power. All batteries store in DC.
Multiple conversions mean a loss in efficiency. DC coupled inverters otherwise known as Hybrid inverters store electricity more efficiently, there is as much as 10% loss in multiple conversions.
AC-coupled battery installs are often the preferred choice of installers because the installation is quicker and easier.
The most efficient installs are always a DC Hybrid inverter. One App to view all monitoring of production and storage, one guarantee.
Even when retrofitting a battery to an existing solar install DC coupled are better suited.
With an AC install there is a second application that must be made to the District Network Operator ( Western Power) this is because you will have 2 generators at your property ( 2 inverters) each having the capability to export power effectively doubling what might go back to the grid. Grid restrictions often ask for smaller inverters or lower discharge rates which negates the point of an AC inverter.
Many installers will not opt for this option as Hybrid installs take longer and are more involved with the existing array however they are the better option for efficiency and monitoring platforms.
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Harvest Cornwall Ltd, Unit 6 Darbari Building,
Prow Park,Newquay,TR7 2SX
01637 808244 / 01637 854997