TigoTS4-A-O Module Add-On Rapid Shutdown, Optimization, 1500V UL/1000TUV, 1.2M Cable, MC4 Genuine Connectors, Part No. 461-00252-32

I have a grid connected solar system which offsets 50% of my use. It is SolarEdge grid tied. No way to install batteries with it.I got a Bluetti AC509 system with 38 kWh and 8 kw solar panels and put them up myself. I found Tigo is the only open standard optimizer system with RSS to enable my system to be code compliant. Works great and improves areas of the system with temporary shade. Now I am covering all our energy use with solar and have off grid backup.The Tigo app is easy and I get a text summarizing the output each day. I can see a detailed layout with each panel.I sent Tigo a question about installation and got a response in hours and a follow up call the next day making sure everything was working well.Best customer support ever from Tigo.I wish my initial solar company used Tigo instead of SolarEdge which is a locked system. SolarEdge won’t let me administer my system or add panels. I can’t add third party battle backup. Tigo is the opposite and the future, especially in its ability to work with any charge controller or inverter and to comply with rapid shutdown requirements.

For my setup these are working amazingly well. I have several shadows (my chimney, the neighbors chimney, and my rooftop air conditioner) that sweep across my solar panels similar to a sundial during the winter months. Before installing these, my panels would only produce enough to to cover the loads of my house and only charge my batteries up about 10% from what they were the previous day. As an experiment I ordered just enough Tigos for one of my two strings of panels. I wanted to see if they would actually make a big difference and this allowed me to compare my two strings of solar panels one with tigos and one without. I also bought through Amazon even though they were a few dollars more than other sources, but Amazon's return policy is awesome so I figured if they didn't work out I could return them. I saw big enough difference in my panels output that I went ahead and bought enough for the remaining string of panels. Now during winter my panels are producing enough electricity that my batteries are charging up to 100% by 1:00 in the afternoon. I went back through all my records and I've never seen my panels produce this amount of electricity even during the peak summer months. I don't feel bad about spending the money because I think these are saving me probably $100 per month of grid electricity. So they should pay for themselves in about 6 months. And it is also healthier for my batteries since they're cycling all the way up to 100% and then draining down to 20% consistently. I seriously could not be happier but everybody's situation and set up might be a little bit different.

I've a small, double-rack ground mount solar array consisting of nine panels in each row. During evening hours, two panels on the front row end up in shade over an hour before the others fall into the same problem. I thought I could make two of these Tigo TS4-A-O Module Add-On Rapid Shutdown, Optimization units reduce the associated degradation of the entire row.If did not work. It seems the Tigo TS4-A-O units require some of my panel power just to operate. In the end, I actually loss more power than what could be gained over the one hour complication. That said, I don't blame the Tigo units. They appear to work as advertised, but in my circumstance, the gain wasn't worth the loss. Food for thought

Great way to address shading on panels. It helps current to bypass the shaded panel so you can increase production by 20-30% on a shaded string.If you want panel level monitoring and RSD capability you will need the other components. If you just need shade optimization then this is the one to get.

I using these in a blind install. I can tell the difference since I have partial shading at certain parts of the day.

It works as advertised. Worth it.

In my case shading is only an issue for a short time in the morning. The overall PV array seemed to produce a slightly higher output when shading is present. However, in my experience the overall output was actually a bit lower when all panels were in full sun (compared to without the optimizers installed). As I perceive the situation, the optimizers are each drawing a small amount of power from the array to operate the onboard mppt and communication before each optimizer. If you have shading throughout the day, these may help generate more power, otherwise it’s more likely a break even situation, or even a slight net loss of total usable power.The quality of the optimizers is very good and they are easy to install.

I live in Indiana which has lots of trees, so we have shadows. Solar panels don’t like shade and shut down or mess with total output from your arrays. These smartly bypass the shaded panels and smooth out the output voltage and current to give me more energy all day as the sun moves across the sky. It works.