Exciting news! we have a group discount from Eco ESS on auto changeover switches which really solve the lack of a fox gateway.
https://www.eco-ess.co.uk/
Quote FoxG1 when ordering for a discount on auto changeover switches
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3 x KH Hybird Inverters (Parallel Mode)
1 x H1 Gen1 (Solar Mode)
1 x H1 Gen2 WL (Testing, Modbus and API development)
24 x HV2600 (62.4kWh)
32 x 490w across 4 arrays
2 x EV's (Tesla & Mercedes)
Heatpump & Low Carbon Housebuild
Did I help you? Feel free to leave me a tip Book a zoom meeting for remote consultancy or help Switch to Octopus and earn £50 Subscribe to my YouTube channel3 x KH Hybird Inverters (Parallel Mode)
1 x H1 Gen1 (Solar Mode)
1 x H1 Gen2 WL (Testing, Modbus and API development)
24 x HV2600 (62.4kWh)
32 x 490w across 4 arrays
2 x EV's (Tesla & Mercedes)
Heatpump & Low Carbon Housebuild
Hello
can I ask how you simulated a power cut? I have had an EPS box installed, and wanted to test it, but cannot see how to?
can I ask how you simulated a power cut? I have had an EPS box installed, and wanted to test it, but cannot see how to?
This is a great article! I only got a H1-G2 5kW based system with PV and EP12 battery this week so I thought I'd add some thoughts myself. I'm not an electrician in any way but I've been exposed to electrical work and have a very keen interest. I've set up Level 1 as that's all I believe I need. Level 2 would be nice but not worth the cost of getting someone do mess with the consumer unit as grid power is very reliable here.
Firstly, the subject of Earthing (grounding) is very important to have correct. The number one rule in my opinion with N&E bonding is there can only ever be one bond in circuit at any one time, otherwise currents can flow over the earthing system as there's alternate paths for neutral current to flow.
It turns out my inverter has a N&E bonding relay, but it's only enabled in EPS off grid mode if the grounding setting is on. If grounding is off, the relay doesn't activate. I've verified this with various tests on my inverter. Of course yours may not have an N&E bond relay but confirmation is better than assumption. Even if you have an internal N&E bonding relay like me, if you're using an N&E bonding on an external changeover switch, you should turn off the one in the inverter.
With grounding turned off, socket tester reported a bad earth (even though earth rod has around 60ohm loop impedence well below 200ohm limit) and voltage across L-N was roughly 230V, L-E 115V, N-E 115V. With grounding turned on, socket tester was happy. L-N was 230V, L-E was 230V and N-E was 0V, so this confirmed N&E bonding is working and my grounding setting is correct.
Wiring the earth/EPS/grounding mode setting is also subject to local regulations and your own installation, so where you live may be different, but correct earthing in my opinion should be confirmed if there is the slightest doubt especially before enabling EPS, get someone qualified to check. Something that's right for someone on here might be dangerous for someone else with different regulations, earthing systems and installation.
Another comment about inline overcurrent protection, my H1 manual states along the lines of loads must not be connected directly to the inverter without overcurrent protection, so based on that, I don't think you should connect plugs or anything directly without it. I've put one in line on 2.5mm cable to the sockets so there's 20A external overcurrent protection, which is roughly 4.8kW, very close to the inverter limit of 5kW, with 30mA RC external protection too.
Firstly, the subject of Earthing (grounding) is very important to have correct. The number one rule in my opinion with N&E bonding is there can only ever be one bond in circuit at any one time, otherwise currents can flow over the earthing system as there's alternate paths for neutral current to flow.
It turns out my inverter has a N&E bonding relay, but it's only enabled in EPS off grid mode if the grounding setting is on. If grounding is off, the relay doesn't activate. I've verified this with various tests on my inverter. Of course yours may not have an N&E bond relay but confirmation is better than assumption. Even if you have an internal N&E bonding relay like me, if you're using an N&E bonding on an external changeover switch, you should turn off the one in the inverter.
With grounding turned off, socket tester reported a bad earth (even though earth rod has around 60ohm loop impedence well below 200ohm limit) and voltage across L-N was roughly 230V, L-E 115V, N-E 115V. With grounding turned on, socket tester was happy. L-N was 230V, L-E was 230V and N-E was 0V, so this confirmed N&E bonding is working and my grounding setting is correct.
Wiring the earth/EPS/grounding mode setting is also subject to local regulations and your own installation, so where you live may be different, but correct earthing in my opinion should be confirmed if there is the slightest doubt especially before enabling EPS, get someone qualified to check. Something that's right for someone on here might be dangerous for someone else with different regulations, earthing systems and installation.
Another comment about inline overcurrent protection, my H1 manual states along the lines of loads must not be connected directly to the inverter without overcurrent protection, so based on that, I don't think you should connect plugs or anything directly without it. I've put one in line on 2.5mm cable to the sockets so there's 20A external overcurrent protection, which is roughly 4.8kW, very close to the inverter limit of 5kW, with 30mA RC external protection too.