have a guy that needs new batteries

at present he has 8  100 ah  bats 4s 2p

being a old  48v system  with   about 3.4 kw panels and 2  pwm charge controllers

I told him to go with 4 series 12v  200 ah bats to simplify things

Now the big questions

battery recommendations  excl lipo

I have been impressed with Omni power in the general range of 2500 cycle lives

Trojans are good but seem to be in the 1750 cycle life range

or maybe I'm  looking at it wrong

cheers all

 

9 minutes ago, maxomill said:

battery recommendations  excl lipo

Does this include Li-ion? 

If not, please consider Pylontech?

If so, I would go for Trojan. 

11 minutes ago, maxomill said:

battery recommendations  excl lipo

Lipo would be lithium polymer. Does that mean recommendations for NMC, LCO and LFP is allowed? :-P

thanks guys

but  no lipo no pylons as I believe they need to talk to the inverter

remember I have a pwm cc to consider

looking at 4 x 200ah  in series  or something

trying to get to the 20 k range  for complete set

also want a  victron battery monitor to switch back to Eskom

any ideas on that would be appreciated

cheers

 

12 minutes ago, maxomill said:

also want a  victron battery monitor to switch back to Eskom

A victron battery monitor has a configurable contact. I use 12 volt through that relay to energize an interposing relay. The relay in turn switches 220 volt to the coil of a 63Amp Contactor. Should the SOC go below setpoint, the grid to the inverters are switched on. Above a certain value it drops out again and i run offgrid till grid is needed again. 

If this is what you meant. 

 

15 minutes ago, maxomill said:

but  no lipo no pylons as I believe they need to talk to the inverter

I dont think this is completely the case. Unless i have it wrong, but as far as i know @gabriel runs on pylons without any comms link to the inveter. If you want to use SOC as control in ICC for example , then you need a special cable to communicate to the Software. @Chris Hobson. your opinion please? 

1 hour ago, Jaco de Jongh said:

I dont think this is completely the case. Unless i have it wrong, but as far as i know @gabriel runs on pylons without any comms link to the inveter. If you want to use SOC as control in ICC for example , then you need a special cable to communicate to the Software. @Chris Hobson. your opinion please? 

The Pylons are approved to be used with the following inverters: Goodwe, Victron and Voltronic. There are some other but they have not made it to our shores. When it is operating with a Voltronic product (either an Infinisolar or an Axpert) there is no communication between inverter and the BMS. @Manie's ICC has been approved as an interface between Voltronic products and Pylontech. This helps as you can set the battery to discharge according to SOC rather than voltage.

 

thanks guys

@Jaco de Jongh  there wont be any icc

 but I love the battery monitor idea

cheers

 

Trojan SAGM 12 205 in the best choice here. Far superior to the Omni power offering.  

http://livingsolar.co.za/product/sagm-12-205/