Ground Fault Investigation Guidance
Ground fault alarms can be caused by a range of site-side issues, including AC wiring faults, incorrect polarity, poor earthing, abnormal grid supply conditions or high earth electrode resistance on TT systems. In some cases, the issue may also relate...
Installation Clearances & Environmental Position Statement (UK)
Fox ESS products are designed for safe and reliable operation across a wide range of real-world installation environments. Published installation manuals provide recommended clearances and environmental conditions based on standardised testing and optimal performance scenarios. Download a PDF copy of...
Commercial Battery Storage & Insurance: Bridging the Knowledge Gap
Supporting installers in navigating insurer concerns around lithium battery systems in commercial environments Download the Safety & Risk Clarification Statement Introduction Over recent months, we have received increasing feedback from installers encountering resistance from insurers and underwriters when proposing or...
Coming soon: Fox cable covers
In response to installer feedback, Fox is developing a new range of cable covers designed for our full range of hybrid inverters and modular batteries. These covers attach directly to the main chassis, providing added protection against tampering while delivering...
G98/99/100 type test report downloads
If you are requested to supply the type test report to accompany your DNO application, a full archive of downloads is provided below: ModelG98G99G100Cyber Security DeclarationS G2 (all models)DownloadDownloadF3000 (G3)Download Download F3600 (G3)Download F4600 (G3) DownloadF5000 (G3) DownloadF6000 (G3) DownloadG7 DownloadDownload G8 DownloadG9 DownloadG10 DownloadG10.5 DownloadT3 (G3)Download Download T4 (G3)Download T5 (G3)Download T6 (G3)Download T8 (G3)Download T10 (G3)Download T12...
Fault current contribution data
As part of a DNO application, it may be necessary to submit fault current contribution data that is not detailed on the specific G98/99 type test report. Where required, please see documents below: For H1-G2, K Series, H3 and H3...
Why does FoxESS recommend higher-rated MCBs than the inverter’s output?
One of the most common questions we get from installers and system designers is:“Why does the recommended MCB size in the FoxESS manual seem higher than the inverter’s rated output current?” At first glance, it seems counterintuitive. If an inverter...
Why does my inverter make a high-pitched sound?
This is known as coil whine and is perfectly normal in modern inverters, especially when the system is working hard (charging, discharging, or exporting to the grid). It happens when electronic components like coils or transformers vibrate slightly as electricity...
PV oversizing with Fox ESS inverters: what you need to know
At Fox ESS, we’re often asked about PV oversizing—connecting a larger solar array than the rated power of the inverter. The good news? PV oversizing is not only permitted with our inverters, but it’s also a widely accepted design strategy...
How to calculate maximum battery charge rates
The maximum charge rate varies based on the inverter model and the specific batteries used. In simple terms, the charge rate is determined by multiplying the charge current by the battery voltage, resulting in a value measured in VA (or...
