diy solar

diy solar

Very new to solar but started purchasing items, not sure of the final specs of the whole system.

Yeah I guess your only option with the 12kw would be to 2 totally stand alone systems from the batteries through to the AC loads

That's actually our load plan here as the farm grows
I have two 12kw one for each breaker panel but I had not originally thought about an ev. But we do use a decent amount of fuel due to work and it will be interesting to see if we can manage it. The diesel reports are looking terrible as well and I have so much farm to work to finish.
 
Bulk of the summer days and you have so much production run ac all day etc. System goes negative by 4:35pm, two days of very heavy clouds. Interesting to see the voltage vs 58% left.
 

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We have sunlight so the mad dash to do 6 loads of laundry started, almost caught up to yesterday's usage and its only little after 2:00pm.
 

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Always interesting to see how much energy is used and we did not even finish it all. Almost double the kwh just on laundry. Every 4 days we cook 24 meals for clients and is not even close to the same amount used. Due to being in the 55f-70f we are hardly using anything on the heating side. Today we are back to clouds so the amps are very low again.
 

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Needed more 2/0 decided to check craigslist and few surplus sites. Found these less than 1/2
the cost of the temco I had been using. Figured that would be a good deal and just cut the connectors.
Anyone have any idea of what these are used for? I suspect some type of welding and I wonder what the
amp rating on the connectors are? Could attempt to cut them in a way I could use them but unsure.
 

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Forgot to get pics of the combined over 400 amps charging today, bank 1 is almost done so it has dropped a down some but 355 amps few minutes ago.
 

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Anyone have any idea of what these are used for? I suspect some type of welding and I wonder what the
amp rating on the connectors are? Could attempt to cut them in a way I could use them but unsure.

Brand "Best Weld"

I would expect at least 200A intermittent duty. Could be 400A intermittent, 200A continuous.
My 225A (10% duty cycle) buzz box had maybe 4 awg.

Brass, not as good as copper for continuous.


They seem to be set-screw, so no need to cut.
 
Brand "Best Weld"

I would expect at least 200A intermittent duty. Could be 400A intermittent, 200A continuous.
My 225A (10% duty cycle) buzz box had maybe 4 awg.

Brass, not as good as copper for continuous.


They seem to be set-screw, so no need to cut.
Brand "Best Weld"

I would expect at least 200A intermittent duty. Could be 400A intermittent, 200A continuous.
My 225A (10% duty cycle) buzz box had maybe 4 awg.

Brass, not as good as copper for continuous.


They seem to be set-screw, so no need to cut.
Very interesting, thank for the link. I took a closer look so that is nice it may be able to remove it. I just cared about the wire and the price was great.
 
Super easy to remove.
 

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Well just got a big disappointment on my two racks that have a 5k weight limit. The driver warned me before opening the door to the trailer. He said they told him to still try and deliver them but had to refuse both.
 

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Interesting, sun is partially out and at the same time we have a heavy cloud over us pouring rain but its not affecting production to much.
 

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Very odd the emergency heat activated, all settings in eco are off for this. System had been running fine since last year and never turned on the em heat. Had to just disconnect and bypass it completely, 12k could start it but if both water heaters were on it would shutoff. Em heat would push it to just under 11kw.
 

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After fixing the em heat, I decided to do a test. Since it was sunny I put the heat at 79f for upstairs. Before the system went negative yesterday turned it back to 70f. The house was still at 76f after 12:00am and only used 11% of bank 1 for the nighttime heating. Temperature got down to 39f yesterday evening. 79f is to hot for me but our older clients like it, getting the house to 79f more than doubles the kw but why not run it.
 

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Encounter something new today, since 1:40 it has been so dark and rainy that sccs actually cutoff. It would not matter how many more I added when its this heavily overcast. Did not even see this happen during winter last year from the months of clouds.
 

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Cats have been on the homemade treadmill battery charger for a few hours but they are not keeping up with the heating.
Estimate it will use another 18kwh maybe more through morning. Winter is not easy, summer more power than I can
ever use. Many times I think about offsetting winter loads with a pellet stove or some form of wood heating. Supposedly
the skies will clear after 1:00pm.
 

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We got down to 44% on bank 1, just got a delivery of inverters this morning.
 

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Eg4 pics, everything that it comes with.
 

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Energy delta going from 40's down to 20's, using more from 12:00am to 9:00am than a whole day in the 40's.
 

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We have been hitting consistent low 20's. If its sunny maxing out the heat during the day is saving us around 10-22kwh each night.
Most of the time the heat does not turn on till after 2:00am even though I turn the heat back to the normal schedule at 4:30 pm.
Today I have the hvac maxed, mini split maxed. Then got out 3 of our old 5k 120v heaters and started those up.
Even with 69k btu's it's staying positive.
 

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Hit and odd issue today I was down around 50+ amps, one growatt was not producing.
With the growatt scc if you get very dark cloud cover quickly enough to drop to zero when the sun comes out
they will not produce. I have had this only happen twice though as it needs to get dark very fast. This is an easy fix
as turn them off and back on corrects the issue. But one was not doing anything, turn off and back on and nothing.
Checked at the scc and it is showed 180v+, also could see the battery from the scc terminals. Isolated each string and checked and found no issues. Then brought one string online and it was produce almost 5 amps, then add each string back and was now at 48amps.
It has continued to work all day and will be interesting to see what occurs tomorrow. On a good sunny day bank 2 should be at or over 300, bank 1 at 220amps.

Since time is running short went with autel 240v charge, does from 6-40amps and can be scheduled.
 

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