G99 Witness Testing & Commissioning
Pannell & Partners undertakes G99 testing & pre-commissioning for system approval across the whole of the UK. Following on from G99 acceptance, we can offer Frequency Response Testing.
Periodic Testing - a requirement of ENA's G99 Document. Please contact us to programme in a suitable schedule for your "Loss-of-Mains" protection system.
LATEST - We are able to undertake ALoMCP works to update your system interface protection Loss-of-Mains to the latest DNO requirements.
G99 tests are applicable to battery energy storage (BESS), PV (photovoltaic) solar parks, wind turbine installations, CHP (combined heat and power) installations including Anaerobic Digester installations and rotating machine embedded generation.
Our extensive experience in G99 witness testing, from battery energy storage, commercial rooftop solar PV to the UK's largest ground mount solar PV parks, hydroelectric, CHP, wind turbine and short term parallel generators means that you can have confidence in successful G99 witness testing completion.
We strongly recommend contacting us at the same time as the DNO when booking a G99 witness test, so we may converse directly with the DNO to arrange mutually conducive dates. This prevents the embarrassing situation of not being able to find a G99 tester for the witness test if it is left too close to the commissioning date.
Our many clients have also recognised the benefits of arranging a pre-commissioning G99 test prior to the scheduled witness test. Any problems found can be remedied before the DNO is due to attend site, if arranged a day or two (or longer) before the final witness test. This saves missing deadlines, losing money and requesting repeat visits from the DNO - a problem with their very busy schedules.
Feedback from DNO engineers has shown that they are very impressed when clients have taken this initiative to prepare their sites properly before the witness test - it gives them confidence in the system.