This off-grid solar power system kit provides nearly everything you need to bring 7.3kW of off-grid solar power and battery storage to a home, large cabin, or any other remote location. Choose your preferred battery type and solar panel mounting option, and you're on your way!
The heart of this system is an OutBack FLEXpower TWO pre-wired dual inverter system rated at 7200 continuous Watts. Featuring two of OutBack's vented VFXR3648A pure sine wave inverters and two of OutBack's FLEXmax 80 MPPT charge controllers wired together in a single unit that can be wall-mounted either horizontally or vertically, the FLEXpower TWO delivers 120/240VAC output at 50Hz or 60Hz (selectable).
The answer starts with knowing how much power you need on a daily basis in kilowatt-hours (our load calculator can help with this; divide the number it gives you in Watt-hours by 1000 to get kilowatt-hours, or kWh).
Compare your daily kWh needs to the map here, which shows the amount of daily kWh this system's solar panels will produce if installed at an optimal tilt during the time of year when there's the least amount of sun. If your needs exceed the solar potential shown for your area on the map, check out our larger off-grid solar power system kits or call us at 800-919-2400.
If this 7.3 kW Off-Grid Residential Solar Power System is appropriately sized for your needs, then it's time to consider which battery storage and solar panel mounting options you want to use with it. The tables below compare each of these options.
|Battery Type||Trojan L-16-RE-2V Premium Flooded Lead Acid Battery
||Outback EnergyCell 1300RE
48V Battery Bank
|KiloVault Lithium Battery
|# of Batteries in Kit
(Necessary cables, access also included)
|(24) Trojan L-16-RE-2V Flooded Lead Acid Batteries||(24) Outback 1300RE
48V Racked Battery Bank
|(8) KiloVault 3.6kWh Lithium Batteries|
|Maximum Recommended Depth of Discharge (DoD)||50%||50%||80%|
|# Cycles at Max Recommended DoD||1600||1800||5000|
|Battery Amp-Hours (C/20 Charge Rate)||1110 Ah||1148 Ah||300 Ah|
|Battery Watt-Hours (C/20 Charge Rate)||2220 Wh||55,104 Wh||3600 Wh|
|Total Battery Bank Capacity (C/20)||53.3 kWh||55.1 kWh||28.8 kWh|
|Maximum Useable Capacity
at Max DoD
|26.65 kWh||27.5 kWh||23.04 kWh|
|Average Price Per Battery||$433.71||$679.35||$2538.70|
|Average Cost/kWh Cycle*||$.19||$.33||$.18|
|Average Lifespan||7 years||8 Years||13 Years|
|Operating Temperature Range||-20° to 45°C||-23° to 60°C||0° to 45°C|
|Weight per Battery||118 lbs||180 lbs||85 lbs|
|Warranty||2 Years||2 Years||3 Years|
|Country of Origin||USA||China||China|
|Pros||Smart Carbon technology for 15% improved cycle life.
Least expensive option up front.
|Nano Carbon technology improves charge/discharge.
Avg cost up front.
Modular and lightweight.
No cooling or ventilation needed.
Lowest lifetime cost.
|Cons||Maintenance required (watering).
Replacement costs (~4X over life of solar system).
Requires ventilation due to off-gassing.
Limited to 4 strings in parallel.
|Replacement costs (~4X over life of solar system).||Highest up front cost.|
*Average Cost/kWh Cycle = (Avg Price Battery/(# Cycles x DoD X Wh)) x 1000
|Mounting Type||Roof Mount Option
||Ground Mount Option
||Top of Pole Mount Option
|Kit Includes||IronRidge XR1000 14' Rails, clamps, and flashing||IronRidge XR1000 14' Rails, clamps, and caps/connectors||2x MT Solar 12 Module Mount with crank and hoist, IronRidge XR1000 14' Rails, clamps, and combiner box|
|Weight Tolerance||Up to 70 PSF||Up to 90 PSF||Up to 50 PSF|
The exact solar panels used in your kit may depend on what's available to us and what's best suited to your needs.