Difference between revisions of "Solar"

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If you could install a 1KW system at $2.00/watt you make a return of about $66/yr or $66 on a $2000 investment or about 3.3% annual interest on your investment.  
If you could install a 1KW system at $2.00/watt you make a return of about $66/yr or $66 on a $2000 investment or about 3.3% annual interest on your investment.  


===1KW inverter==
 
:[http://www.dhgate.com/wholesale-1kw-1000watt-solar-wind-panel-grid/p-ff80808135ec763c0135f29f4592775f.html plugs into wall 1000 watt $253]




[http://rredc.nrel.gov/solar/calculators/PVWATTS/version2/inputv2.cgi?Cell_i_d_=0274366&Latitude=42.098&longitude=-70.92&State=Massachusetts&Electric_r=14.614 02130 calculator]
[http://rredc.nrel.gov/solar/calculators/PVWATTS/version2/inputv2.cgi?Cell_i_d_=0274366&Latitude=42.098&longitude=-70.92&State=Massachusetts&Electric_r=14.614 02130 calculator]
At 30 degree tilt the average solar is <math>4.29\frac{kWh}{\frac{m^2}{day}}</math> The bedroom roof would probably produce around $220/year at $.15/kwH
At 30 degree tilt the average solar is <math>4.29\frac{kWh}{\frac{m^2}{day}}</math> The bedroom roof would probably produce around $220/year at $.15/kwH
==existing use==
==existing use==
===heat===
===heat===

Revision as of 14:12, 22 December 2012

Commonweath SolarII reqs

Interconnection Agreement. A separate application must be submitted to the electric utility to start the formal interconnection process, and sufficient lead time should be allowed, based on time frames listed in the Interconnection Tariff (see link below). All PV projects must have an appropriate electric utility interconnection agreement in place at the time of interconnection to the utility grid.

small inverters

Enphase microinverter UL approved $150+32(connector) 220 watt

calculator

A KW worth of panels will produce about $190/year of electricity on my roof. In 15 years that's about $3000 worth of electricity so to break even you need installed cost to be < $3.00/watt.

"PVWATTS v.2: AC Energy and Cost Savings"

"Station Identification"
"Cell ID:","0274366"
"State:","Massachusetts"
"Lat (deg N):", 42.37
"Long (deg W):", -71.03
"PV System Specifications"
"DC Rating:"," 1.0 kW"
"DC to AC Derate Factor:"," 0.770"
"AC Rating:"," 0.8 kW"
"Array Type: Fixed Tilt"
"Array Tilt:"," 30.0"
"Array Azimuth:","180.0"

"Energy Specifications"
"Cost of Electricity:","16.6 cents/kWh"

"Results"
"Month", "Solar Radiation (kWh/m^2/day)", "AC Energy (kWh)", "Energy Value ($)"
1, 2.79, 69, 11.46
2, 3.60, 80, 13.29
3, 4.59, 109, 18.11
4, 4.79, 108, 17.94
5, 5.39, 120, 19.94
6, 5.50, 115, 19.11
7, 5.45, 117, 19.44
8, 5.34, 116, 19.27
9, 4.83, 104, 17.28
10, 3.97, 91, 15.12
11, 2.72, 62, 10.30
12, 2.43, 59, 9.80
"Year", 4.29, 1150, 191.06

If you could install a 1KW system at $2.00/watt you make a return of about $66/yr or $66 on a $2000 investment or about 3.3% annual interest on your investment.



02130 calculator At 30 degree tilt the average solar is <math>4.29\frac{kWh}{\frac{m^2}{day}}</math> The bedroom roof would probably produce around $220/year at $.15/kwH

existing use

heat

hot water

~30 therms/mo

electrical

DIY panels

10w 12v mounts to panel $59

about charge controllersa 555 charge controller

diy instructions

tabbing wire flux pen bus wire diodes

epoxy]