• Minimum 3 months of premise utility bill 
• Building rooftop & elevation drawings 
• Building single line diagram (SLD)  

PvFoundry will conduct site visit to verify if the premise rooftop condition. If the rooftop is deemed unfit for solar installation, we will provide recommendation how to proceed. If the premise rooftop is already out of warranty or due for maintenance in the near term, it would be in premise owner best interest to complete the repair or install the new roof before solar installation. Otherwise, it would be costly to remove the panels to repair the roof and then restore the solar panels.

A typical solar panel roughly weighs about 28kg. Including mounting structures, the total weight of solar system on roof will be approximately 13 – 15kg per meter square. Building roof mechanical load structure is often designed to withhold few times the required weight. PvFoundry will conduct building structural analysis and get qualified professional engineer to endorse before proceed with solar installation. 

PvFoundry as the solar system developer will engage Electrical qualified person to endorse the single line diagram (SLD), Civil Structure qualified person to endorse the mechanical load and installation structure, conduct require applications & lodgement to respective authorities as part of the solar system design and installation full turnkey services. 

PvFoundry will use either self-proprietary solar panels or other industry Tier One equivalent brand to optimize client solar system design. We will select appropriate hardware for system optimization, and to ensure our clients have access to the industry’s most competitive product technology at the best value and quality.

Battery may not be relevant to your premise project scenario. Battery storage is usually applicable in off-grid scenario where client does not have accessibility to city grid. PvFoundry will judge if battery is necessary and will recommend it as an option to the full turnkey customised solutions when necessary. Battery Energy Storage System (BESS) is a tailored solution and is not usually included in our basic package. 

• A typical solar panel warranty is 25 years. Solar panels will continue working at an average of 80% efficiency of their Day 1 rated label power at the end of 25th year after considered annual degradation effect. 
• A typical solar inverter which converts DC to AC carries 5~10 years product warranty.  
• Other system components eg. mounting structure, clamps, cables, etc. are considered durable parts.

Solar system generally requires very little maintenance in order to continue function. Client can engage PvFoundry or third-party qualified person to handle the routine maintenance. A typical maintenance contract scope of coverage as follows: 

• Electrical Testing and Visual Inspection every 6~12 months 
• Cleaning of PV modules & inverters every 6~12 months 
• Labour for replacement of faulty parts under product warranty coverage 
• Ad-hoc Electrical Engineer (Qualified Person) attendance for fault and emergency, and electrical system annual check & testing report 

Yes, you will need power from the grid if your consumption load is higher than the amount of solar energy generated. For example, you will need power from your grid when your rooftop solar system is not generating power at night.

• Shortage of power - The switchover to grid is seamless and does not require manual intervention. When the solar energy generated is insufficient to supply your load, power will be drawn from the grid to supplement it. 
• Excess of power - Any excess energy will be exported to the grid as credit. *Please refer to your solar developer to handle these technical aspects