# ESS assistant - total solar power **URL:** \ **Category:** Q&A and troubleshooting\ **Tags:** ac\_coupling, mppt, pv\_inverter, ess\ **Created:** [29 March 2025 13:09 UTC](https://community.victronenergy.com/t/ess-assistant-total-solar-power/26980 "2025-03-29T13:09:35Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![lxonline](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/lxonline/32/25567_2.png) [@lxonline](https://community.victronenergy.com/u/lxonline)\ **Post date:** [29 March 2025 13:09 UTC](https://community.victronenergy.com/t/ess-assistant-total-solar-power/26980/1 "2025-03-29T13:09:35Z")
Hello. If you have a system with AC Coupled PV such as a Fronius and you have DC mppts (as you should if there is a need for black starts); do you have the total solar power include the DC power as well or does the assistant only cpver the pv power on the AC coupled inverter? For example and 8.2kW Fronius with a slight over panel would look like this. But if I have DC mppts should the installed amount be included on line 2? ![ESS PV Power Installed](https://europe1.discourse-cdn.com/victron/original/3X/b/6/b6351c721c38f08cf0e06b712fa0314c44b97307.jpeg) ---
**Author:** ![grua](https://avatars.discourse-cdn.com/v4/letter/g/ec9cab/32.png) [@grua](https://community.victronenergy.com/u/grua)\ **Post date:** [29 March 2025 13:30 UTC](https://community.victronenergy.com/t/ess-assistant-total-solar-power/26980/2 "2025-03-29T13:30:31Z")
Since the factor 1 rule is mentioned in the dialog, I am sure that only AC-coupled PV power (Fronuis) is to be specified, since the factor 1 rule only applies to this. Furthermore, this only affects PV inverters connected to ACout, not those connected to ACin. ---
**Author:** ![lxonline](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/lxonline/32/25567_2.png) [@lxonline](https://community.victronenergy.com/u/lxonline)\ **Post date:** [29 March 2025 13:45 UTC](https://community.victronenergy.com/t/ess-assistant-total-solar-power/26980/3 "2025-03-29T13:45:42Z")
That is how i understand it as well.