Excess energy to home grid-storage system

On grid solar set up in the Philippines is still at it's infancy state. The net metering scheme or set-up is relatively new and is mostly applied for home roof top systems.

Net metering scheme mandates the distribution utility (DU) to credit the net energy exported by the on-grid solar power system in the roof during low demand (day time). Net energy only arises when the solar power generation system generates more electricity than the household consumes. When we say credit, this means monetary i.e. Peso equivalent of the energy exported into the grid. The rate of credit is equivalent to generation charges of the distribution utility. So if the DU generation charge is Php6 per kW-hr, that will be the credit rate for every kW-hr exported to the grid. Sounds fair?

Not so. Not so because if instead of exporting the excess energy the household uses/consumes it, then the monetary value should be equal to the power rate per kW-hr by the DU. The average power rate is around Php10 per kW-h. This means that for every kW-hr exported to the grid, the system owner loses Php4 or whatever the difference of the generation charge and power rate.

It is advisable for home owners to consult with system providers like EastGreenfields the proper size of the on-grid system that will optimize the cost of the system. Only if the full generated energy is used 100% by the home owner the system gives its full value and fast ROI. But if the system exports too much of it's excess energy then the ROI takes longer time to recover.

Enter the small scale grid storage options...

What if using the excess energy is use to charge the batteries for use at night (lights and to power not so heavy loads like desk top or lap tops and LED TV sets for 4 hours) rather than exporting it.

EastGreenfields will be introducing the home base on-grid storage in 2016 and we are very excited. We will be testing the pilot project in Q1 of 2016, and we will introduce to the market after our own testing and adjustments.

We will be introducing 500 watts to 2000 watts on-grid battery storage system.

Watch us out!

POTUS Talks about climate change during the APEC 2015 in Manila

POTUS Talks about climate change during the APEC 2015 in Manila.

As a company EastGreenfields is all geared up to face the challenge and provide solutions combat climate change.

Visit us www.eastgreenfields.com or email us: inquiry@eastgreenfields.com, and lets discuss in deeper detail how we can help you save the environment.



http://fortune.com/2015/11/18/obama-interviews-jack-ma-at-apec-about-climate-change/

ERC approves new rate for solar projects

ERC approves new rate for solar projects
By Alena Mae S. Flores

The Energy Regulatory Commission approved a solar feed-in tariff of P8.69 per kilowatt for an additional capacity of 450 megawatts.

ERC said it based the new rate on total project cost, engineering, construction and procurement cost, net capacity factor, switchyard and transformers, transmission interconnection cost, equity internal rate of return, peso and dollar exchange rate, inflation and consumer price index.

The regulator said in a resolution solar plants commissioned prior to the new solar feed-in tariff rate would continue to enjoy the original feed-in tariff rate of P9.68 per kWh.

The additional 450 MW brought the solar installation in the country to 500 MW.  Only solar projects that qualified for the first 50 MW and endorsed by the Energy Department would qualify for the original rate.

“It shall be effective immediately after the publication of the resolution adopting the same. To align the same with the DOE’s certification dated April 30, 2014, the new solar FIT shall be valued until March 15, 2016,” ERC said in a decision.

The agency said it computed the total plant cost for solar at $1.958 million per megawatt, or within the capital costs of ground mounted solar plants based on the report of REN21 entitled Renewables 2014 Global Status Report.

The National Renewable Energy Board earlier proposed a feed-in tariff rate of less than P9.10 per kWh for the additional 450-MW solar installation.

NREB vice chairman Ernesto Pantangco earlier said many solar developments had applied for feed-in tariff rates, or the preferential rates for renewable energy projects.

NREB is the implementing agency of the Renewable Energy Act of 2008, which ushered in the entry of renewable energy power projects in the country.

Earth Day - Carbon dioxide emission 2014

While March 28 2015 is designated as 2015 Earth day, it is high time during this event to know about the carbon dioxide emission that each of us contributed every time we switch on every bulb, television, computers and charging our cellphones.

Carbon dioxide is a leading green house gas that warms our planet to unprecedented levels. The level of annual temperature increase already leads to climate pattern disturbances that includes cyclones, super typhoons, drought, rising of sea level, remember super typhoon Yolanda (Haiyan) in 2013, it is attributed to global warming.

In 2014, Meralco has distributed a total of 30,611.85 Giga watt hours of electricity within Metro Manila, parts of Bulacan, Cavite, Rizal, Quezon Laguna and Batangas. Do you know how much of this electricity was produce using fossil fuels and how much was produce using earth friendly (renewables) means? When we say about renewables that means energy from geothermal, hydro, wind, biomass, solar and biodiesel. Renewables are carbon neutral and does not contribute to global warming.

So who are the electricity generation plant source for Meralco in 2014?

And what are the fossil fuel type used by electricity generators that Meralco distributed in in 2014?

Meralco source it's 2% of distributed electricity in 2014 from renewable energy sources. Meralco sourced it's RE electricity from San Roque hydro electric from San Miguel Corp, WESM (Wholesale Electricity Spot Market) and from its own embedded customers like those from solar roof tops, biomass plant, landfill gas plants in Payatas and Montalban.

Electricity derived from hydro electric plant is the largest renewable energy contributed to Meralco. 

While WESM has several type of renewable energy, its renewable energy contribution to Meralco is 291.40 GWH. The fossil based electricity contributed by WESM to Meralco is 1,046.74 GWH.

The renewable energy technology contributed by WESM are geothermal, hydro, wind and biodiesel. These technology are carbon neutral or non CO2 emitting technology. Biodeisel contributed 2 GWH, Geothermal 172 GWH, Hydro electric 113 GWH and Wind 2.94 GWH. 

Do you know that in 2014 for every kWh of electricity we used, we contributed 0.59 kg of CO2.

So if each one of us uses 720 kWh per year, that means 177 kg of CO2 release into the air. 

Typical Filipino household consumes 300 kWh per month, that means 3600 kWh per year and CO2 emission of 2,124 kg CO2.

Do you know that each mature tree (5 years old and above) absorbs 23 kg of CO2. That means for each year if your household has an emission of 2,124 kg CO2 and you need to have at least 92 trees! 

Ask yourselves, did you plant 31 trees last year to offset your CO2 emission? Think about the environment each time you switch on that bulb, or the time spent playing computers or watching TV... each activity contribute to green house emission.

So how would you celebrate earth day in 2015? And how would you reduce your electricity consumption to help reduce the green house gas emission?

sources: Meralco website, WESM website and UN IEA website (for CO2 factor emission)

This blog was created with Metro Manila electricity consumption and its carbon emission in mind. 

Philippine consumer net metering experience

Philippine consumer net metering experience

This blog entry is about the QE (Qualified End-user) experience after installation of a Photovoltaic Generation system.

The installation is located south of Metro Manila Philippines. 

The installation is composed of 3 arrays:

2x 230 watts Canadian Solar PV module driven by micro inverter.
3x 235 watts Yingli PV module driven by micro inverter.
5x 250 watts Yingli PV module driven by a string inverter.

The total name plate capacity of the system  is 2,415 watts-peak.

History of the installation:

The installation started with 2x 230 watts array in early 2012.(http://www.eastgreenfields.com/solen-project)

The installation (lets now call it Project) was not expanded since Net Metering is not yet in place. Net Metering implementing rules and regulation (IRR) was only approved in late 2013.

The project was applied for net metering connection in 4th quarter of 2013, and was finally commissioned on July 2014.

When energized the total nameplate capacity was increased to 1,165 watts-peak. The Project capacity was further increased to 2,415 watts-peak as of mid-February 2015.

The electricity usage since the Project was approved for net metering increases, and the last 12 months average decreases. This means that the household now have extra electricity to power the appliances, while the import energy practically remains the same. Refer to graph below:

The last 12 months import average decreases while the actual load demand increases, this means more available energy for use generated from PV system. 

From July 2014 (when net metering starts) up to mid-February 2015 (before expansion to 2415 watts-peak capacity) the own use against exported energy is higher, but when the expansion system was put on-line the export energy is now higher than the own use energy.

Actual bill payment decrease as export credit increases.

Graph  shows the overview of the Project with the actual data from Meralco billing record.

Savings from actual load (usage of electricity without solar) ranges from 16% to 34% during the first 7 months of the Project with a capacity of 1165 watt-p system. The savings from actual load rises up to 63% when the system was expanded to 2415 watt-p capacity.

Following scan copy of the actual Meralco Bills...

Farm wastes as sources of renewable energy

By Rudy Romero
Manila Standard Today (online) 

Whenever they ponder alternative energy sources, most people usually think of energy derived from geothermal resources, the sun, wind and waves. They hardly ever think of a renewable energy source that, because of the abundance of its raw material, is one of the least expensive alternatives to oil. I am referring to methane gas derived from animal wastes.

Sometime in the 1980s, when I was doing investment-banking-type work, I was introduced to a German company that specialized in energy projects powered by methane gas generated from farm wastes. The company was looking for a Philippine partner for a methane gas project, with technology as their contribution thereto. Unfortunately, with Filipino alternative-energy mindsets oriented at that time towards geothermal and solar power, I was unable to package a project for the German company.

The technology for generating energy from farm wastes is relatively uncomplicated. Farm wastes – fecal matter from farm animals as well as residue from coconut and crop stalks – are collected, mixed and placed in containers so as to generate methane gas, which then goes into small turbines to produce electricity. The German executives said that with the methane gas generated by its animal and crop wastes, an average Philippine farm would be able to produce enough energy to light up the farmhouse and drive appliances and farm implements.

Given the promise that it offers, it is a great pity that renewable energy from farm wastes has not yet attracted many investors. As already pointed out, the needed raw materials are abundant in Philippine farms. This makes the production cost of farm-waste-generated methane gas probably the lowest among renewable energy sources.

A steady rise in the share of methane gas in total renewable-energy supply is not going to just happen. Much proselytizing will have to be undertaken by both the government and the private sector.

On the government side, the Department of Energy obviously will be the lead agency. More specifically, it is the Energy Development Corporation that will have to be in the forefront of development of a farm-waste-based methane gas industry. Because farm wastes are involved, the Department of Agriculture and the Department of Agrarian Reform also will have to play major roles in the effort. The Department of Science and Technology also will be a key player.

On the private-sector side, it is the agricultural-industry organizations that will have to be depended upon to spread the message about the attractiveness of farm wastes as a source of energy. Particularly important will be the farmers’ and farm workers’ organizations in the coconut, sugar, rice and corn industries. These industries account for most of the farm wastes in this country. For the sugar and coconut industries the farmers’ organizations concerned are the National Federation of Sugarcane Planters and the Philippine Coconut Federation, respectively.

Just how abundant and powerful methane gas can be as a source of renewable energy can be seen from the gas fumes emanating from city and municipal garbage dumps. Before it was redeveloped, Smokey Mountain used to emit a lot of methane gas from all the recyclable and non-recyclable wastes dumped there by the local authorities. Indeed, small flames would erupt when mistakes were thrown at the dumps.

A vibrant methane gas industry based on farm wastes: that is something to be fervently wished for. It can happen. For the more stable development of the Philippine countryside and the rapid progress of the Filipino farmer, it should happen.

http://manilastandardtoday.com/2015/03/17/farm-wastes-as-sources-of-renewable-energy/

Solar Power 101: Getting Started with Solar Electricity

Getting Started with Solar Electricity

Part 4 of 4 Series

From HP online magazine

With grid-tied PV systems becoming more and more popular, it is important for RE professionals and system owners alike to have realistic expectations of their systems’ performance. Solar-electric power production can be affected by several factors. Orientation, array tilt, seasonal adjustments, and array siting can all affect the bottom line. Proper planning and smart design will help you get the most out of your PV system and improve your rate of return. Installing modules in a sunny, shade-free spot and pointing them toward the sun could be considered common sense to many, but properly orienting and tilting your array for optimal performance is not as intuitive. A PV array’s output is proportional to the direct sunlight it receives. Even though PV modules produce some energy in a shady location or without ideal orientation, system costs are high enough that most will want to maximize energy yield. Regardless of how well a system is designed, improper installation can result in poor performance. PV systems should operate for decades, and the materials and methods to install them should be selected accordingly.

Should you install your system or hire a licensed professional to do the work? What skills and tools do you need to tackle a home-scale PV project? How much will you save if you install the system yourself? We frequently get questions like these from Home Power readers. Rather than defaulting to the obvious answer, “it depends,” we explore a long list of variables you should thoughtfully consider before tackling the design and installation of your PV system. Owner installation is definitely not for everyone. Like any home improvement project, it’s important to realistically assess your skills, and weigh the benefits and potential pitfalls. Installing a PV system certainly isn’t rocket science, but doing it well and safely requires experience working with electrical systems, some serious research, and plenty of sound advice. The installation of most residential PV systems is usually better left to the pros, but if you have the right set of skills and expectations, installing your own system can be a realistic goal.