I've read through all the ESS documentation and wiring diagrams and read everything in the forum and watched several training videos about ESS and wiring for ESS and still have some questions, hopefully you all can help me get things sorted out!
When running ESS with no grid feed option and prioritizing PV to run essential loads (AC OUT 1) is a current transformer needed and what is the best method for isolating the essential loads?
Currently, all the loads are in one service panel before the inverter. I have divided the panel so my critical loads are on one side and non-critical loads are on the other side. I have a breaker interlock on the breaker receiving the AC OUT from the inverter and manually throw it when I need to power the side of the panel with critical loads, which is 120V as I am using a 120V Multi. Essentially, its more-or-less a combination of a UPS system and backup system intended for rare grid failure, but I want to use ESS to export as much PV as possible to reduce the Grid AC loads during the day (and charge the batteries.) Generally the system will use Grid AC at night and only use battery consumption when no Grid AC is available limited to a 50% SOC. My current configuration/setup is obviously not an optimal situation as I am not setup to back-feed the grid and have no intention to do so, but currently this 'manual' procedure is what I am doing until I better understand ESS and wiring for it.
When designing for ESS, is it appropriate to move all the critical loads out of the main service panel into its own subpanel and leave the non-critical loads in the main panel and/or should I be utilizing a current transformer? Also, is there a reason to use AC OUT 2 at this point, if the non-critical loads remain in the main service panel, as they don't 'need' to be utilized when Grid AC is not present. However, I would like the option to still use non-critical loads. Therefore, are ALL the loads supposed to be after the inverter on AC 1 and AC 2?
Is it best to have two dedicated breaker panels, one for critical loads (AC1) and one for non critical loads (AC2) and just use the main service panel as a distribution point for the Grid AC and the placement of the current transformer. Trying to understand the best configuration taking into account the ESS and Multi's capabilities. Below are several threads I've posted relating to this subject. Thanks in advance for an insights or suggestions and thank you to those who have already commented in previous posts, I look forward to your suggestions.