case studies
National Grid
| Product |
Customer |
Sector |
 |
 |
National Grid US(www.nationalgridus.com) is the second largest utility
in the USA. It delivers electricity to 3.3 million customers in Massachusetts, New Hampshire, New York and Rhode Island,
and manages the electricity network on Long Island. |
Pnu Power Compressed Air Batteries perform reliably in temperatures of -40 to +50°C (-40 to +122°F), making them ideal for harsh environments.
challenge
- provide a reliable UPS at the National Grid US Barrington No. 4 substation, Rhode Island
- operate in parallel with an existing lead/acid battery installation, which is due for replacement
- deliver greater reliability, lower maintenance and OPEX costs than lead acid batteries, in a harsh climatic environment
solution
- Pnu Power 5™ Compressed Air Battery, rated at 4kW, with 240V split phase 60Hz input and 125 Vdc output
- integrated automatic recharge compressor and cylinder pack, with 35 Bar (507.5 PSI) air store
- complete system installed externally, with small footprint
benefits
- lower OPEX and whole life costs than conventional lead/acid batteries
- more consistent and reliable performance, with far lower maintenance
- no need for special housing in a harsh climate (locally -20 to +30°C)