6 ms·
Current for charge controllers scales really nicely with horizontal scaling, there isn't a huge reason to do it. With that said there can be various reasons to
by seany 3y ago
Current for charge controllers scales really nicely with horizontal scaling, there isn't a huge reason to do it. With that said there can be various reasons to want higher VOC in a single string. Managing voltage drop, and value engineering on conductor size. The marketing on those is often aimed specifically at max input voltage, rather than charge current because of this. Victron is probably the prime example of higher end stand alone MPPT controllers.
- cyberax 3y agoThese days, I recommend using DC optimizers that are attached to each module. They provide MPPT tracking on a module level, and make engineering calculations simpler. They are also much cheaper than microinverters, safer, and more reliable.
- mitthrowaway2 3y agoAny specific examples that you would recommend?
- cyberax 3y agoTigo optimizers are nice, and you can have just one optimizer for 2 modules. It's mostly meant for commercial bifacial modules, but it can work just fine for 2 completely separate modules. You can also use their cloud monitoring thingie to remotely track each DC optimizer's health. Or you can use SolarEdge optimizers, they are simple and cheap (<$100 per module). Both support automatic shutdown, so you can safely de-energize the entire system if needed. It's a problem for classic string inverters.