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Dc Coupled​

Dc

Coupled Solution

A DC Coupled solution is used when you are integrating energy storage with a new PV installation. You can also retrofit an energy storage system to an existing PV array if the PV array has string inverters.
DC-Coupled-System
Fortress Power’s

What is Dc Coupled?

DC coupled solutions allow both the PV and the battery to be served by a single inverter

In a DC coupled configuration, the battery will be directly charged by the solar panels compared to when you use an AC Coupled system and the solar power goes to PV inverter first and then to charge the battery. Thus, DC coupled solutions are more efficient and you avoid the cost of a PV inverter.

Fortress Power’s

Fortress Power’s DC Coupled solution

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
  • Max. 3 in 1-Ph (120/240V)
  • Max. 6 in 3-Ph (120/208V): 3 units per phase
Warranty 10-Year standard warranty
  • Ground Breaking Efficiency: 93% round trip efficiency (PV -> Battery -> AC Load), 5-20% more than our competitors.
  • Easy to Install: All power electronics are integrated in one unit to make a complete solution. It takes less than 2 hours to install the system.
  • Safe & Long Lasting: We use the safest lithium ferro phosphate technology with 6,000 life cycles guaranteed.
  • Safe & Long Lasting: We use the safest lithium ferro phosphate technology with 6,000 life cycles guaranteed.
  • Very Powerful: Our systems can provide 12KW continuous AC output and 20KW surge power and enable you to use large appliances such as 3Hp well pumps and A/C units.
Fortress Power’s

Sol-Ark 12KW Inverter

In Fortress Power’s DC coupled solution, we use the innovative Sol-Ark 12KW Inverter which integrates a charge controller, inverter/charger, control panel, communication and distribution box in one compact unit making installation easy. For more information on these solutions, click here.
  • All in one unit (Off-Grid; Time-of-Use; Self-Supply; Back-up; Grid export; Peak shaving)
  • Extremely Compact & Easy Installation
  • DC Coupled & Transformerless
  • Leading Roundtrip Efficiency (PV->Battery->load): 93%
  • High Surge Power: 20KW
  • Auto-Gen Start included
  • Allows to use of Gen Output to AC couple to an existing PV array
Fortress Power's

Other Applications

Mobile Applications
Marine

High energy throughput with exceptional life span (6000+ cycles) and high round-trip efficiency (>98%)

Off Grid Applications
Cabins/camping = small

High energy throughput with exceptional life span (6000+ cycles) and high round-trip efficiency (>98%)

Energy Storage Applications - two ways to connect your solar systems to batteries - AC and DC

High energy throughput with exceptional life span (6000+ cycles) and high round-trip efficiency (>98%)
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Fortress Power

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