©2018 by Solar System Services.

October 21, 2019

For safety reasons, when the utility is down so is your grid-tied inverter.  This is to prevent the line workers from getting shocked as they repair the lines and restore power to all.

However, there is still a way to take advantage of the sun.  By adding a battery back...

October 21, 2019

Watts is the amount of instantaneous electrical power required to support a load, and is a product of the voltage and current.  Watt hours is the amount of energy a load has consumed over time, and is a product of power and time.

As an example: a 13W light bulb that has...

May 16, 2019

Sadly I see a lot of off-grid solar systems fail in the fall.  They fail for all kinds of reasons, from shading to improper wiring, but the most common is that the solar array can simply not produce enough energy to support the load.  In other other words, the solar sy...

February 13, 2019

Where you install your off-grid solar system could be critical to it's performance.  The following are somethings to look for when siting your system.


The solar array should be facing True South to maximize energy production throughout the year.  If you are...

January 4, 2019

Most Power over Ethernet (PoE) devices can easily be powered by an off-grid solar power system.  Whether it's a camera, radio, audible alarm, or some other device; a properly designed solar system can support the load for many years with minimal intervention.

Most impor...

September 26, 2018

Nowadays there seems to be a standard for almost everything, and the same holds true for solar.  There are actually several industry standards for solar, that vary from components (e.g. solar modules) to system design (e.g. stand-alone solar, hybrid design).  I'd like...

September 18, 2018

How do I correctly calculate the load for my off grid photovoltaic system?

The "load" is the energy consumed by the devices attached to - and also those belonging to - the system.  Properly calculating the load is essential to designing a system that works correctly, a...

September 13, 2018

Solar systems can be expensive.  Yet there are some easy ways to save big when delivering solar electricity for applications in remote locations without sacrificing quality or performance.

Tip #1 - Shop your solar suppliers

If you use a vendor independent engineerin...

May 9, 2016

Rob Rallo has been in the solar industry since 1990, focusing mostly on battery based and off-grid systems. His goal is always to design a cost effective system that meets the needs of the user while maximizing the performance and life of the components.

For many y...

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