diy solar

diy solar

Segmentation

UlfSidda

New Member
Joined
Apr 16, 2024
Messages
7
Location
Idaho, USA
Hello, in planning my system and learning about the difficulties with solar, I have come up with some questions. Would it be better and/or easier to segment my system? As in, say I need to run a CNC table, a plasma cutter, a rack of 3-d printers, a plastics extruder, etc., would it be better to create a micro system for each "tool" or should I lump everything together into one system? Also consider this question from a multi-modal standpoint, e.g. solar, wind and water. My thoughts are, I can "brick" each power system individually, but that leaves me with a bit of insecurity. Say, my hydro generator breaks down, now the building relying on hydro power is without power. See where I'm going? I'd also like to be able to install a "shunt" (I don't know the right word) between buildings in case of, say, bad weather, solar's out, wind has to be shut down and a manual brake applied, leaving only water, which may not provide enough current to keep up with the discharge of the batteries, but anyway I'd like to electrically connect all the battery banks, so that when the house needs power, and the metal shop (for example) has a surplus of power, I'd like it to kick in and share the power with the house, but that's a topic for another thread, I'm just trying to provide context, if it wasn't needed I do apologize, but in this thread I'm just asking about breaking the system into smaller parts.
 
Load shed. You can have contactors to disconnect larger loads based on battery SoC, or inverter going into derating.

Priority switching, cut out discretionary loads like heating elements when something else big is on.

Parallel/redundant hardware. Charge controllers from difference sources are paralleled. You can parallel inverters, shut one off or disconnect it if failed.

Right now I have one wired as master, but I want to assign another as backup master and use connectors for its control outputs and inputs. Connect another temperature sensor to redundant inverter. Then all I have to do is move data plugs and configure new master.
 
Most people do not arrive at the conclusion to segment.

At least not the battery bank. Feed all the generation into one big battery bank I'd say.

Segmenting inverters, maybe. Like I have two buildings and currently run them off one 7kW inverter. When it comes time to expand, I will consider running two 7kW's separately, one for each building, rather than dealing with the complexity of paralleling them into one 14kW system.
 
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