I'm looking to create a grid-zero system that can automatically switch between my grid power (40A at 120V) and my battery bank. The goal is to use battery and solar power whenever possible and revert to the grid when the battery voltage drops. This setup is also intended to serve as a backup during long power outages.
Here's what I've got:
- 8 Rolls 460Ah 6-volt lead-acid batteries
- 12 405W solar panels (which can be arranged in any configuration and will be mounted on a standalone frame)
- Trace SW4024 inverter
Additionally, I have some 60A charge controllers, although they're likely too small for my new panels.
I've been advised to switch from the old 24V inverter/charger to a 48V system, specifically the EG46000XP split phase. If I stick with the SW4024, what charge controller would you recommend? Also, does anyone have experience with the EG4 unit or suggestions for a more budget-friendly alternative?
3 Answers
I noticed your grid supply is just 40A at 120V, which could limit your setup because the EG4 6000XP is designed for split-phase 240V. If you plan to use it with 120V, you’ll only get about 3000W. For your charge controller, be sure to get the open circuit voltage and current ratings of your panels, then pick one that suits your configuration. Here’s a setup I’m using with the 6000XP; it includes Lifepo batteries for better compatibility and communication with the inverter:
You should definitely go for the 6000XP. The quality of the EG4 is really impressive and worth considering for your setup.
Thanks for your input! After looking over the feedback and the manual for the EG4 6000, I see it's only compatible with 240V split phase and is actually spec'd for 100Ah batteries. I’m now considering the smaller EH4 3000 EH 48; it might be a better fit for my needs.