Gidsie

I'm of the opinion that you should add BSL to you list.. IMHO the best off all batteries support wise
I Bought 1 new BSL in 2020 and have been adding 2nd hand batteries as I go along
I paid R25k new and 8k 2nd hand, all where recently remotely inspected by getoffgrid as they are still under warranty

Hi all,
I’ve got a Mecer 200Ah LiFePO4 (12.8V) battery, about 2 years old, running with a RCT VM1 1000w 12v inverter. Because load shedding has been minimal, the battery hasn’t worked hard – maybe 200 cycles total, mostly shallow.
I recently tested it with a constant 500W load through the inverter. It only lasted about 2 hours before low-voltage cutoff. That feels way too short – I was expecting closer to 4–4.5 hours for a healthy 200Ah battery, even with inverter losses.
The battery label says:
Bulk/absorption: 14.6V
“Recommended for inverter”: 14.1V (which I’ve been using daily)
Cut off 10.5v, I've set the inverter to 11.5
From what I’ve read, LiFePO4 batteries balance best at higher voltages (around 14.4–14.6V). So maybe charging at 14.1V all the time has prevented proper balancing, especially since the battery rarely gets a full charge?
Questions:
Is this safe, and will occasional full charges at 14.6V help re-balance?
Has anyone else with a Mecer 200Ah seen low capacity like this, and fixed it with higher voltage charging?
Could there be other causes (BMS issues, early cell degradation, inverter cutoff too high)?
After testing, should I go back to 14.1–14.2V daily and just do a 14.6V top-up monthly?
Any advice or experiences with these batteries + Axpert/Mecer inverters would be much appreciated.
Thanks,
Dale

Sold

I have a 5kw Sunsynk (5K-SG03LP1) In existing use, no problems whatsover, bought and installed DEC 2021 via a reputable installer. I want to Sell.
Also Included: 2x Hager 2P 40A MCB Breakers (M240Z), 1x Hager 2P 40A ChangeOver (STFT240) , 1x 12way Eurolux Surface PVC DB, 1x 1P 40A CBI Breaker
Also included: Custom 12V blower 3x fan assembly via temperature controller
I want R13 000 for the 5kw Inverter inc Breakers & Fan
I reside in Centurion close to the SA Mint

The prices on their site is just not possible 

That’s true however it also depends on the individual requirements of the owner. Some prefer to keep their batteries more full due to more power outages and others less as they are more better with management 

As a low user of only 8kwh a day I would start with a 5kw Sunsynk and only add a 2nd one if needed. Also it seems as if a 5kwh battery will be fit for purpose. Only get a 2nd one after using the 5 for a month or 2. ROI is greatly affected by spending a R25 000 that might not be needed.
As you are working from home loads can be adjusted to use during the day. The 4.5kw panels can produce an easy 18kwh during the summer day time with full sun. 2nd battery only needed if you have long Eskom outages.
Just my 2c worth.
 

So the cats out of the bag ,Eskom got their 9.6% increase and they are not happy about it,wanted 20%.
https://www.news24.com/fin24/economy/just-in-eskom-tariffs-to-increase-by-961-20220224
So my question is will this be the increase that filters down to the end user or will the municipalities still ad a buck or two ?
Would like to know the new rate per/kw to calculate the SAVINGS per MONTH .😁

Hi, mine is configured for output, I power the geyser if there is excess production. I have not used it for anything else.

Tx, forgot to come back, turns out the CT clamp wires were swapped around so the export was confused.

Tanks Supplier busy checking BMS.

IMHO There are 2 reasons for bonding panels to shortest path to ground earth:
To attempt to neutralize static build up on Solar Panels, which in turn attracks lightning To Dissepate energy to ground incase of a lighting strike, via shortest route and away from electrical equipment, Grid and infrastructure

My Electrician and HOA insisted my Panels get earthed directly to under 10 Ohms
They both say it is the new SANS requirement, so I had to do it to get signoff
That resulted in 4  Rod positions being drive into soil.  2 sets of 3x 1.2m rods and 2x 1.2m rods  bonded on 16mm earth wire over a distance of about 12m away from where it exits builing
The DB earth and PV Box Surge Protector Earths are joined but may not touch the Solar Panel earth