What to do with load outputs of multiple charge controllers to one battery bank?

JimGiblet

I have recently installed a very simple standalone solar sytem at my Mum's house.  There are two 350W PV panels each going through their own indiviual solar charge controllers which are then connected in parallel to the 80AH 12V battery.  The load then goes to the house which has just a few 12v lights and a 12v fan running on a composting toilet system.  My question concerns the load outputs of the solar charge controllers.  Each controller has positive and negative for the panels, the battery, and the load to house(lights ect).  Do I need to connect both controllers' load outputs to the house, or just one set?

FoldPV

Interesting question!

According to my point of view, (I'm not an expert) and seeing my neighbors, they have installed 1 complete set... 

I mean, that they put multiple systems and connected everything into one...

But I can't tell you how much power they have... 

Let's wait for the experts 🧐 Can you share some images?

mcgivor

Having multiple controllers is fine with a single battery as long as the settings are the same or close, the battery voltage will regulate the current needed, the transmission to different stages of charge much differ slightly but generally that is not an issue. 

The loads are better connected directly to the battery, fused with an appropriately sized fuse or circuit breaker. To retain low battery cut off, or any other features, use a relay driven by the load terminals and run the loads though a normally open contact.

mike95490

several quality charging sources can reliably be paralleled into a single battery bank.  Not a problem.   I'd not do it with harbor freight gear though.