Recent content by zanydroid

You can jumper it yourself in the same way. There is a safety and performance question, if you jumper it yourself the basic safety of making sure the current is shared (so one doesn’t get all of it) is achieved If consistent resistance is important to max out performance / spread the load...

For your specific question, the subreddit would mostly help with common installation patterns (quite good at it , they debug stuff like reversed CTs and bungled jobs all the time), what products Enphase has, and detailed technical lore. Most of your question I think is more generic, because it...

You do in California. Even with zero export/self consume configured. I was reviewing the paperwork and policies this morning.

Exactly. I’m just a layperson but from skimming our governing documents I can see how they evolved from other on site generation, to solar and battery. Another mode covered (and inherited from old school on site generator usage pattern) is momentary parallel, which is more like SBU operation...

Have you tried the Enphase subreddit for more focused expertise? It’s pretty good and a 180 from here where Enphase is a minority setup (though the biggest microinverter). I’m a bit confused. Doesn’t your updated SLD show the great solution? I guess the question is mapping it to physical world...

Not super relevant to you, but I was actually reviewing interconnection policy documents (the official ones, not blogs) in California when I couldn’t sleep this morning, and zero export with unintentional spurious export is a class of system you can get approval for. There are rules for system...

So as said before there is a control loop in a hybrid to adjust power to seek to achieve the export target (could be zero). The specifics depend on AC vs DC coupling. What level of detail do you need? There are slide decks out there showing it all the way down to the inverter level, including...

Ok let me re read the thread. BTW your first SLD didn’t show the battery, and grid tie implies no battery. As such you’re a bit lucky to have gotten any engagement, and it’s kind of all over the place as it is. Hybrid or off-grid are more appropriate (and the two have important distinction in...

Let’s take a step back. Why do you want to do this, especially when you don’t have a battery? There are some legit reasons and some questionable ones.

The DC bridge jumpers address my concern since they should pretty reliably ensure the two inputs share the current, and I expect that they do something smart with matching the resistance into both sides Your screen shot points to the settings config on page 72

Also you need to be mindful of failure modes/transient modes where only one input can sink the current from a string. IE you want to turn off a disconnect that disconnects both at the same time, when you do any wiring changes

Yes but you need to turn on that mode in the config. Otherwise they could fight, if running in independent mode, because independent trackers may try to operate at different voltages And “both MPPTs” may be the wrong way to express this but you probably understand what is going on.

I think 9s in paralleled MPPT mode is 100% safe and should be able to max out the inverter since the 22A DC in spec is usable operating current, and that is lower than Isc. And 22A is way higher than what your panel can push out

I read this as, it has a mode where the two MPPTs are locked together, so both inputs can take the output from same string. Probably similar to what you are saying. This mode is not available in all brands. Wasnt sure if this mode has a different min start voltage. I think the start voltage is...

I haven’t heard of this number. It will pull Impp as appropriate to the lighting and temperature conditions. Isc safety is more complex and it depends on the specific inverter. You have to sort of get lucky and wait for someone who has your inverter (which sounds rare). Going above Isc is...