Generator Procurement & Maintenance at British Consulate-General San Francisco Official Residence

We require a generator capable of running essential appliances and lighting in a five bedroom home owned by the British Government. The generator should be able to run continually for up to five days in the event of a widespread, persistent power outage. The generator should meet or exceed environmental standards. For service issues, the successful bidder will need to commit to quarterly preventative maintenance and be available within 24 hours for emergency maintenance, or 72 hours for urgent, non-emergency maintenance. Please describe how you will meet these minimum requirements.