Solar Power Project

A project to explore grid tie power to power schools in developing countries

solarInstall.JPGSolarInstall2.JPGsolarInverters.JPG

Overview

The MVNU Computer Science department has a continuing project to work with technologied in schools. This project started with creating internet connected computer labs for schools. We soon discovered that the cost of electricity, which is high in Belize, was problematic for schools with very limited. Thus we began exploring solar solutions to augment available power, and thus reduce or eliminate the costs of electricity for the schools.

Grid Tie Solar Power

The majority of the schools we work with have electricity, and these typically schools are only in session during the day. A common solution is the store electricity in batteries, and then run of the batteries when it is night, or the sun is otherwise not shining. However, batteries are expensive, have a short life (2-5 years), and typically contain toxic materials which create problems at the end of life. The solution we adopted was to use a "Grid Tie" solution. This design converts solar enrgy directly to 120v AC, and adds it to the circuits being supplied from the grid. The system is designed to first use the energy created by the solar panels, and then suppliment this with power from the grid as needed. Thus such a solution will lower the power usage, but still allow the use of electricity when there is no solar energy available.

Typical Solar Panal Information Specs

Maximum power Pmax 250 Wp
Open circuit voltage Voc 37.6 V
Maximum power point voltage Vmpp 30.5 V
Short circuit current Isc 8.81 A
Maximum power point current Impp 8.27 A
Module efficiency m 14.91 %

COMPONENT MATERIALS

Cells per module 60
Cell type Poly crystalline
Cell dimensions 6.14 in x 6.14 in (156 mm x 156 mm)
Front Tempered glass (EN 12150)
Frame Clear anodized aluminum
Unit dimensions 39.4" x 56.59" x 1.3"
Weight 39.7 lbs (18.0 kg)

Solar Project Live Monitor

Topic attachments
I Attachment Action Size Date Who Comment
JPGJPG SolarInstall2.JPG manage 266.6 K 2015-06-04 - 05:18 JimSkon  
Odpodp belizeprojectoverview2015.odp manage 65398.8 K 2015-06-04 - 05:34 JimSkon SlideShow
JPGJPG solarInstall.JPG manage 206.2 K 2015-06-04 - 05:17 JimSkon  
JPGJPG solarInverters.JPG manage 240.4 K 2015-06-04 - 05:18 JimSkon  
Topic revision: r8 - 2016-10-18 - RobertKasper
 
This site is powered by the TWiki collaboration platformCopyright &© by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback