Guru
Joined: 17/10/2017
Location: BelgiumPosts: 481
| Posted: 12:24pm 29 May 2024 |
Very welcome indeed, interesting schematic you've drawn. Your dad probably knew what he did and had his reasons to set something up like he did.
As an experimental guy myself I would advice you to keep your drawing just for experimental use only until you've proven yourself the reliability of the system.
Can I point some things out?
We came a long way since 30y ago, technology improved and so has availability and costs of equipment and parts. I can be wrong but since you post this kind of "electrical" schematic and no "electronics schematic" I have the feeling you don't have a lot of "hands on" experience with this stuff? (we will be happy to assist you
)Are you able to ask your dad why he did it like that? This might be the most important question for you to ask. If I would take a guess, it's because he had no compatible parts. He had 48V solar panels a 48--> to 24V buck, and 12V inverter.
He wanted to use all the produced energy and didn't want to covert potential energy/voltage to heat.
So above is a clever way to do so, BUT he might have added protection circuitry like perhaps zener diodes over the batteries and inverter preventing them to being overcharged/volted. The charging current will completely depending on the inverter current pulled. So if the load is little the charging current is little, unless you imagine a zener diode over the inverter input this would only limit the current true the batteries provided by the regulator max current. Overnight you can connect the inverter directly to the battery.
The logic behind is very well know and more complex circuits can be calculated with thevenin/krichoff/etc.
May I ask for some more details about power/ currents involved?
If I would only have those given parts I would adapt the buck converter to output 12-14V to charge the battery with maximum efficiency and connect the inverter directly.
If you want to build a serious, efficient system, and start from scratch I advice you strongly to build the nano platform Inverter/mppt controller derivatives.