AC Coupled
ac
Coupled Solution
If you have an existing PV array and want to add an energy storage system, then integrating an AC coupled solution is the perfect option. It’s simple – AC coupled solutions use a common solar inverter coupled to a battery inverter/charger to manage the battery storage unit.
In AC Coupled systems, the DC power from the PV array is first converted to AC by the PV inverter and is then used to power the AC load panel. Any unused energy is directed by an inverter/charger to charge the storage unit. In grid-tied systems, when the grid goes out, the inverter/charger isolates both the essential load panel and the PV inverter from the grid via an internal transfer switch. This allows the PV array to generate power, even when the grid is down.
AC Coupled solutions are simple to setup and very powerful, but they are slightly less efficient at charging than DC coupled solutions. However, they are very effective when powering AC loads during the day and are expandable with multiple solar inverters to form micro-grids.
Fortress Power’s
AC Coupled solution
Fortress Power Energy Storage System now can AC couple to an existing PV array up to 22.8KW! Please click here to learn more.
You can also connect Fortress batteries with several other AC coupled battery-based inverter solutions available on the market, such as Schneider XW+ and XW pro Series (5.5/6.8 KW), Outback Radian GS 8048, SMA Island Series (4.4M/6.0H/8.0H). All the solutions can be AC coupled to your micro-inverters, SolarEdge inverter and many other PV grid-tied inverters. You can check out the integration guidance on our Resource Center.
When it comes to energy storage units, Fortress Power’s Lithium Ferro Phosphate batteries pair perfectly with the Schneider’s XW+. Fortress Power offers three systems, a 5, 10 and 18.5 KWH, which are scalable to 222KWH. This AC Coupled solution is very easy to install, affordable and uses the safest technology available with 6,000 guaranteed life cycles.
Fortress Power
Advantages
yourself. Contact us to learn more about our innovative, personalized storage solution that grows with
you and fits seamlessly into your lifestyle.
Latest Technology
We use the safest,
environmentally friendly
LiFePo technology.
All-in-one Solution
Smart energy management system supports multiple applications.
Lowest Energy Cost
Competitively priced, easy
to install,
and high trip
efficiency.
Long Lasting
10 year warranty up to
6,000
cycles
| Output to the Critical Load | Output to the Grid | ||
|---|---|---|---|
| On Solar or Battery (Back-up) |
With Grid or Generator Present |
Pass-through | |
| AC Output Power | 8 KW | 12 KW | |
| 12 KW | |||
| Storage Capacity | 10/18.5 KWH per unit; scalable to 222 kWh | ||
| Surge Power | 20 kW (5 Sec) | ||
| Critical Load Panel | 50A @ 240V | ||
| Response Time (Grid-tie to Off-grid | 4ms | ||
| Storage Capacity | 10/18.5 KWH per unit; scalable to 222 kWh | ||
| PV Array Size | Up-to 13 KW in DC Coupling; Up-to 7.6 KW in AC Coupling | ||
| Compatible PV Inverters in AC coupling | AC-coupled to Enphase, AC modules, SolarEdge, SMA, Fronius and etc | ||
| PV Array in AC & DC Coupling combined | Total max 13 KW | ||
| Stack-ability |
|
||
| Warranty | 10-Year standard warranty | ||
Fortress Power's
Other Applications
Mobile Applications
Marine
Off Grid Applications
Cabins/camping = small
Energy Storage Applications - two ways to connect your solar systems to batteries - AC and DC
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