Grid-Tied System
Grid-tied, on-grid, utility-interactive, grid intertie and grid backfeeding are all terms used to describe the same concept – a solar system that is connected to the utility power grid.
Advantage
Save Money
- Independent from Utility Grid during day time
- Can sell back excess electricity on to the utility grid through the Net Metering setup
Utility Grid is a backup
- Utility Grid (MERALCO) supply is only used when solar PV system output is insufficient (e.g. rainy days) and during night time
Disadvantage
No power during brownouts
- Grid-tied system only works if Utility Grid supplies electricity
Off-Grid System
An off-grid system (off-the-grid, standalone) is the obvious alternative to one that is grid-tied. For homeowners that have access to the grid, off-grid solar systems are usually out of question.
Advantage
Self sufficient anytime
- Have power even during brownouts and night time
Disadvantage
High cost
- Require to purchase and maintain batteries
- Need backup generators in consecutive days without the sun shining
Hybrid System
Hybrid solar systems combines the best from grid-tied and off-grid solar systems. These systems can either be described as off-grid solar with utility backup power, or grid-tied solar with extra battery storage.
Advantage
Less expensive than Off-Grid Solar
- Can downsize battery requirement; uses Utility Grid as backup instead of generator set
Can sell back electricity
- Net Metering set up is applicable
Disadvantage
High cost
- Purchase and maintenance of batteries
- Inverter is significantly more expensive; new technology and complex
Installation Process
PRODUCT Warranty
- Goods are subject to warranty produced by the manufacturer
- Usual terms for solar panels and inverters are 10 yrs. and 5 yrs. , respectively.
SERVICE Warranty
- Warranty period on Services shall be three (3) months from the date of completed work covered by the agreed Scope of Work.
Other Services
- Installation support and all PV System components (Solar Panels, Inverters, Mounting rails, Cables, Connectors, Groundings) to be supplied as part of the services of SOLARCHE.
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