Slightly less efficient than their DC counterparts they do have other advantages. Off Grid AC Coupled Systems have cost efficiencies at scale and are more effective at powering high AC loads throughout the day.
Generally used for larger scale off grid systems they use a string inverter alongside a hybrid or multi mode inverter. These are typically easier to set up with the potential to be expanded using multiple solar inverters to become micro grids.
When used through the day, they achieve higher efficiency to power AC appliances such as air conditioning, pool pumps and hot water systems.
Cost efficiencies for large scale systems over 6kW
Ability to use multiple string solar systems across different locations (AC coupled microgrids)
When used above 3kW with multi-MPPT inputs, panels can be installed at differing orientations and tilt angles.
Lower efficiency for battery charging – usually around 92%
Solar inverters can be expensive to replace for smaller systems
Will achieve lower efficiency if powering direct DC loads throughout day
AC Coupled – Grid Tied
Historically used in larger off grid systems, advancements in technology in recent years has seen a new evolution in battery storage with AC Coupled Batteries used in many grid connected homes. This technology allows those with existing solar the opportunity to retro fit an AC coupled battery alongside their new or existing Solar.
Don’t be fooled though. They are both AC but designed for very different purposes. On grid, rather than off grid, AC coupled batteries of this type are not typically powerful enough for off grid applications or to run a home in its entirety. Some may even struggle to handle multiple appliances so thorough research is always recommended. However, as they are smaller and compact in design, Systems tend to be modular and very easy to expand if storage needs grow.
Can be retrofitted to homes with existing solar systems
Simple to install
Low cost – economical way to add energy storage
Expandable and modular – system can be expanded If required
Not usually suitable for off grid applications
Lower efficiency due to conversions from DC to AC to DC at around 90%
Some AC Batteries cannot provide back-up power supply during grid outages
In addition to utilizing a PV-Battery DC charger, the AIO2 is also able to be AC coupled to existing solar. This means that the battery can be charged, not only from your new Soltaro solar system, but also from any excess power generated from your existing solar system.
USB Rechargeable Batteries – The Latest in Battery Innovation from the experts at Soltaro.
Available as AA or AAA with only 1.5 hour to full charge. Super efficient with no loss of power and over 300+ re-charges. Simply use the included USB cable to Recharge your batteries whenever you need to. Available from selected retailers or by clicking this link.