JBoffgrid2022
Solar Enthusiast
- Joined
- Oct 28, 2022
- Messages
- 474
Hello All!
1. Looking for some general guidance on methods to provide a back up power source for my three EG4 6kXP's in parallel. The instruction manual only gives the following guidance (below) but fails to explain in detail how this could be implemented in a real world situation in parallel configuration. Would I be bringing my generator wires into a separate panel, then into the inverter sub panel? Or would I bring the generator wires straight into the inverter sub panel? I was hoping someone on here has been able to install a generator hook-up in a similar situation and has also been able to get it to pass their local code enforcement.
2. Does anyone here have recommendations on a propane fueled generator size? The manual states the generator should 150% larger than the total inverter bank which in my case is would be at least a 25kW gen.
Thank you all!
EG4 Manual:
4.7.3 GENERATOR AC CONNECTIONS
Please follow the steps listed below to ensure your Generator connections are installed correctly.
Note: If running more than one inverter in the system, you must wire the generator to provide power to every inverter running in parallel for the inverters to function as intended.
Step 1: Before making any wiring connections, be sure to have the inverter(s) powered off, the generator powered off, and all circuit breakers open (off) to prevent damage to the unit.
Step 2: Properly identify the generator’s output lines. By US wiring standards, L1 wire will be black, L2 will be red, Neutral will be white, and ground will be green. Once identified, remove ≈10mm from the insulation sleeve on the wires.
Step 3: Ground the generator’s output ground to the Ground Bus (labelled PE) of the inverter.
Step 4: Install L1 to the GEN port’s L1 terminal, then install L2 to the GEN port’s L2 terminal. Next, fasten the Neutral wire from your generator into the N-BUS (Neutral Bus).
1. Looking for some general guidance on methods to provide a back up power source for my three EG4 6kXP's in parallel. The instruction manual only gives the following guidance (below) but fails to explain in detail how this could be implemented in a real world situation in parallel configuration. Would I be bringing my generator wires into a separate panel, then into the inverter sub panel? Or would I bring the generator wires straight into the inverter sub panel? I was hoping someone on here has been able to install a generator hook-up in a similar situation and has also been able to get it to pass their local code enforcement.
2. Does anyone here have recommendations on a propane fueled generator size? The manual states the generator should 150% larger than the total inverter bank which in my case is would be at least a 25kW gen.
Thank you all!
EG4 Manual:
4.7.3 GENERATOR AC CONNECTIONS
Please follow the steps listed below to ensure your Generator connections are installed correctly.
Note: If running more than one inverter in the system, you must wire the generator to provide power to every inverter running in parallel for the inverters to function as intended.
Step 1: Before making any wiring connections, be sure to have the inverter(s) powered off, the generator powered off, and all circuit breakers open (off) to prevent damage to the unit.
Step 2: Properly identify the generator’s output lines. By US wiring standards, L1 wire will be black, L2 will be red, Neutral will be white, and ground will be green. Once identified, remove ≈10mm from the insulation sleeve on the wires.
Step 3: Ground the generator’s output ground to the Ground Bus (labelled PE) of the inverter.
Step 4: Install L1 to the GEN port’s L1 terminal, then install L2 to the GEN port’s L2 terminal. Next, fasten the Neutral wire from your generator into the N-BUS (Neutral Bus).