Replying to White The Crow

Hi.

For the plugs I can recomand XT60 they are good till 60A so 20A shouldn’t be a problem.

Do you have a battery ? Or doing directly dc solar to the load (otherwise I do not understand what the capacitors are good for)

With solar-mppt-battery-load you can store power and the solar is mor efficient. This is more true for grid down situation.

Battery wise old car batteries work fine especially if you get them for free. Or if you like the task use Li-Ion. These can be scavenged form all modern battery appliances (laptop, e-bike, scooter,…)

Maybe have an option to go from dc to ac. This could be tied in as the regular ac during grid down.
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Low Information Voter 2y ago 💬 1

Thanks Crow!

Direct to the load, but I do have a number of battery packs I can charge off this system.

Solar-mppt-battery-load was my earlier setup. It gained a couple of percent in efficiency, at the cost of greater complexity and multiple single points of failure.

I learned that the first thing I needed to do when designing an intermittent power system is to kill the Little Tin God (efficiency) and bury him in the foundations.

Solar panels are very cheap, single points of failure are very expensive.

XT60s I shall investigate, thanks for the tip :-)

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White The Crow 2y ago

Yes complexity is increasing.

I do have something like a star configuration. So all solar feeds the battery and then I have the loads connected to the battery.

If you like the distributed system you can use buck converter instead of mppt. Not as efficient as mppt but they are cheaper.

Also if you don’t like centralized battery you can hock up battery’s with buck boost converter (24v to 24v) or buck converter for 24v-12v like in a dasy chain.

For me relatability is the highest priority.