Archive for May, 2011

Georgia does the right thing!

Monday, May 30th, 2011

Georgia Gov. Nathan Deal (R) signed into law House Bill 346 a Solar Investment Tax Credit bill that doubles the amount Georgia will invest in solar tax credits annually from $2.5 million to $5 million starting in January 2012 and going through December 2014. The Georgia Solar Energy Association (GSEA) and others praised the legislation and said that it ensures that the state’s solar industry will continue to thrive.

Under the new law, an expansion of a previous law, businesses are eligible for up to $500,000 in tax credits and homeowners are eligible for up to $10,500 in tax credits to offset the cost of installing solar photovoltaic electricity generating systems. The credits are assessed over four years. When the $5 million ceiling is reached, those eligible taxpayers will be placed on a waiting list and are given priority over taxpayers applying for the credits later, according to a GSEA press release.

There’s no set limit for how much of the credits go to business and how much goes to residential installations, said GSEA Chairman Doug Beebe.

The legislation had bipartisan support, Beebe said. “In Georgia, if you don’t have the Republicans on your side, you’re not going to get anything done,” he said.

To pass the legislation supporters did have to scale it back, according to Beebe. “We wanted $10 million, but we scaled it back to $5 million just based on the response from the governor and legislators.”

Beebe praised the legislation, but said GSEA’s overall goals for the legislative session were not met, according to Beebe. “We had an RPS [i.e., renewable portfolio standard] out there that was shot down,” he said. The group also had promoted failed legislation to incentivize stand-alone solar systems.

The original solar tax credit legislation helped Georgia’s economy by creating jobs. “It has generated jobs, there’s a solar economy that can be grown here.” It supported about 450 direct and indirect jobs in Georgia, Beebe said. Although the tax credit is now doubled in size, Beebe doesn’t expect it to create too many new jobs. “I don’t think it will double the amount of solar jobs. It will allow solar integrators to expand what they already have and maybe hire some more people,” he said.

 

Duluth Ga Solar Hot Water Installation

Thursday, May 12th, 2011


We recently completed our latest solar hot water installation in Duluth Ga. The system is an EnerWorks type. These systems use a standard water heater as the solar storage tank. The EnerWorks “appliance” mounts to the storage tank and performs the heat exchange and pumping. The controller is also housed within the appliance.

 

The solar tank is piped in series with the existing water heater so the solar tank “pre-heats” the water coming into the existing tank. This is known as a pre-heat system.

System shown with panel cover removed. Note the heat exchanger, pump and small expansion tank. A supplemental expansion tank (gray tank against wall) was added to the solar loop for added protection against stagnation.

 

The two collectors are also from EnerWorks. They are 4′ x 8′ glazed flat-plate collectors which do an excellent job of collecting btu’s in southern climates. They are mounted on two C-channels which are secured to the roof with lag bolts. They are connected to the solar tank via 3/8” insulated copper tubing. This solar loop is filled with a 40% mixture of polyethylene glycol and distilled water and is circulated by the pump at the appliance.

 

The fluid is circulated through the heat exchanger and it’s heat is transferred to the potable water in the solar storage tank. This closed-loop system ensures no glycol enters the potable water, however the glycol is also non-toxic as required by code.