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Looking for some advice form the hive mind please…

Current setup - 9x300W panels with a Victron SmartSolar grid tie inverter (MPPT 150/100 Smart solar with color GX controller) on one of our three phases. - 8 deep cycle Lead Acid Mixtech EFB 674DT 12V 105AH batteries.
Other two phases have pool and geyser, and some of the stove/oven respectively.

Geyser is a solar geyser with indirect heating (yes, i know…. got some bad advice)

On my HA energy dashboard the big consumers still are the geyser and pool pump (1.1kw but seems to run at 600W once running).
The tribe of the long hair insist on hot water being available in the morning up until 9:00 (and then whenever they feel like showering.…)
It kills me to see solar power not being used during the day - on a good day we can generate 2800W but if it’s not actively being used it goes to waste.
I have tried to connect the pool onto the phase that has the solar but it trips the inverter MCB - it doesn't shut down the inverter in overload state, simply trips the MCB

The batteries are a bit meh as the inverter seems to cut off during load shedding when voltage is 48V even though the inverter reports 60-65% charge. I suspect the batteries are shot. Max charge voltage I've seen in the last month is 58V.

I’m really at my wit’s end as we are still using 1200KWh on a summer month and worse in winter (2500-4000kwh).
Batteries and another inverter to run the geyser - i.e to warm the water in the morning before the sun starts its work?
Pool pump onto another inverter or change to a DC solar pool pump - was quoted 35K Ronts for that which seems steep……??

Any thoughts would be much appreciated as I find a lot of the people installing solar stuff don’t actually know how to deal with ‘complicated’ setups and use requirements…

We are in jhb (city power) with a smart meter and I suspect this means we cannot feed back into the grid.

  • 4 weeks later...
On 2021/12/24 at 5:33 AM, mikeblackburn said:

on a good day we can generate 2800W but if it’s not actively being used it goes to waste.

I would suggest to increase battery capacity. 102Ah is quite low compared to the inverter and PV potential. How about going Lithium? I now got 400Ah (19kWh) with 2x 5kW inverters.

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