Www.midnitesolar.com Ph. 360-403-7207 Fax 360-691-6862

MidNite Solar’s Pre wired solutions

for Off Grid, Battery based Grid tie and

AC coupled.

www.midnitesolar.comPh. 360-403-7207 Fax 360-691-6862

Ryan, Technical Support [email protected] XT151


mailto:[email protected]

What type of system do I

need?


• Off Grid. • Battery Based Grid Tie.• AC Coupled.

All of MidNite Solar’s Pre Wired systems are fully customizable for

your needs

Off Grid

• Stand alone system• Will not sell back to the

utility• Various inverters available

for Off Grid (Some will do both)

• 120 or 120/240?


Grid Tie With Battery Backup• Sells to the grid• Runs critical loads

during grid failure• Do you need 120vac

or 120/240vac• Some models support

generator input as well


AC Coupled

• Adds battery backup to a purely grid tie system.

• Adds some complexity to the system.

• Best suited for existing grid tie systems as an add on.


• Growing market segment• Can be confusing!• Can be complicated!• Numerous ways to go• MidNite has taken most of

the mystique out of the equation


AC Coupled

What is AC Coupled ?

AC Coupling is a controlled back feed to a battery based inverter A back feed is hooking up AC to the output of an inverter AC coupling is a synchronized back feed. The grid tie inverter shifts frequency to match the battery based inverter before connecting. This makes it ok to do.



Not all battery based sinewave inverters are capable of back feed.

Your choices in North America are:

SMA Sunny IslandOutback FX, VFX and

RadianMagnum PAE seriesSchneider XW series


• Magnum and OutBack inverters sense circuits that control charging are on the AC inputs not the output, therefore cannot control the charging

• These inverters charge wide open and cannot taper off.

• A relay is required to disconnect the GT



• SMA and Schneider use frequency shift to knock the GT inverter offline to stop the charging.

• The Sunny Island will control a Sunny Boy to do tapered charging.



Generators and AC Coupled

• Radian and the Schneider have 2 AC inputs so a generator can be added.

• Provisions must be added to disconnect the GT inverter when the generator runs or the GT will try to sell to the Inverter.


Sizing Of The Off Grid Inverter

• Outback, Magnum and Schneider have a 1:1 ratio limit.

• SMA has a 2:1 ratio

• The customer may not need all of the grid tie solar as part of the ac coupled.


Outback FX series

• 120 vac per single unit.• Either Grid tie or Off Grid

not both. Both AC couple.• Grid tie models (G series)

does not play well with generators.

• Smaller scale and expandable.

• 12,24 and 48VDC models available


Quad Off Grid Outback Prewired


Outback Radian

• Grid tie or Offgrid Supports both AC coupled as well

• 120/240 in a single unit• Has 2 AC inputs (2nd for

generator)• 8,000 watts per unit,

Stackable• 48VDC model• Requires relays for AC coupled


Outback Radian



Outback Radian


Magnum Energy

• 120vac and 120/240vac models (Only the 120/240 PAE should be used for AC coupled) *various wattage inverters available

• Stackable Vented only Off Grid only (AC coupled)

• 12, 24 and 48VDC models

Magnum Energy



Magnum Energy


Magnum Energy

Xantrex XW


• Grid tie or Off grid. Supports both 120/240 in a single unit

• Has 2 AC inputs (2nd for generator)

• 4.5KW or 6KW units, Stackable

• 24 or 48VDC models

SMA Sunny Island


• Grid tie or Offgrid. Supports both

• 120VAC• Single input but we offer an

automatic transfer switch for generator backup.

• 4.5KW or 6KW units, Stackable

• 48VDC

SMA Sunny Island


Ryan StankevitzMidNite Solar360-403-7207 XT [email protected]


Questions?

Documents

Www.midnitesolar.com Ph. 360-403-7207 Fax 360-691-6862