Off Grid Systems

Off Grid Systems


 

Off-grid power systems are for those independent people who plan to live within their means and use only what they produce with solar panels, wind generators, hydro-power, or a combination of these.

 

Off-Grid System Sizing Information

OFF-GRID SYSTEM SIZING INFORMATION

Off-Grid System Sizing Information: Off-grid solar PV systems, like the one shown in the diagram above, are one of the most economical ways to provide electricity in the absence of an electrical power grid. Off-grid systems are useful for remote homes and cabins, RVs and boats, and even for industrial applications like remote telemetry, cathodic protection, and telecommunications.

The size of an off-grid solar electric system depends on the amount of power that is required (watts), the amount of time it is used (hours), and the amount of energy available from the sun in a particular area (sun-hours per day).

Off-grid power systems are designed differently than grid-tie systems. With a battery-less grid-tie system, calculations for system sizing are based on the yearly average peak sun-hours available at the site, and are used to offset the yearly power consumption drawn from the utiltiy grid.

With an off-grid system design, the calculations are usually based on the peak sun-hour figures for the darkest month of the year in order to provide sufficient on-site power year-round. In locations where it is not practical to install a renewable energy power system that will provide 100% autonomy during the darkest time of the year, a generator may be used to help run loads and charge the battery bank.

The first step in sizing an off grid system is to calculate the amount of power needed to run your appliances then you can use this information to calculate the size of the solar array required.

Off-grid power system design is complex, and these systems require specialized inverters, charge controllers, and battery banks.

Please contact us for Technical system design assistance.

Why a Packaged System?
The process of choosing the right equipment for your renewable energy system can sometimes become overwhelming. That's why The Solar Store has put together a variety of pre-packaged systems balanced for typical residential use. These can be used as a starting place when working with us to design a system that best meets your particular needs.

Can I Upgrade or Expand?
All of our pre-packaged systems feature a central "power panel." Any power panel that is purchased with a single inverter can be upgraded by purchasing another identical inverter and DC breaker sometime in the future. Another charge controller and breaker can also be installed at a later date if you want to expand your PV array. PV arrays can be expanded by purchasing identical or equivalent modules.

 

Off Grid Systems with Battery Backup

PV watts

Module quantity

Module brand & watts

System Description

Battery System Voltage

Output VAC

Item code

1020

6

Sharp 170 watt

Pre wired OutBack Power Panel VFX3524 Flush roof mount.

24Vdc

120

010-01000

1530

9

Sharp 170 watt

Pre wired OutBack Power Panel VFX3524 Flush roof mount

24Vdc

120

010-01500

1530 + 1000

9 + Wind Gen

Sharp 170 watt

Pre wired OutBack Power Panel VFX3524 Flush Roof Mount

24Vdc

120

010-02500w

246

2

Sharp 123 watt

DC system w/ roof/ground mount

24Vdc

NA

010-00246

492

4

Sharp 123 watt

DC system w/ top of pole mount

24Vdc

NA

010-00492

 



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