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G98 and G99 Type Tested Inverters on ENA Register, will help you fill in the relevant documentation, <16A for greater than >16 but less than 32A for larger inverter capacity G99 Fast track limited to 3.68kw export with G100 device or Full G99 Speak first to your DNO

Yes you have stated previously but we all have choice's to make at the end of day, same with cars, auto v manual, diesel v petrol v electric you can go on.... depends on the OP budget informed choice is better than not know what is available plus price... let him decided m8 lol

If the loft floor is strong and sturdy to hold 70kg of battery fine, the master battery with BMS on top black stripe around it for info. the top right hand side is the connection from battery to inverter... top left hand side connectors for adding another battery 3 x 200mm cables for...

Boost for PV Array only and not batteries, you can with Solax hybrid and Solax X1 AC What Solax inverter will the Batteries be connected to????

Discharge is inverter capacity dependent..... My Solax X1 AC 3.6kw inverter will briefly discharge at 4000w then drop after 30 seconds to around 3000-3680w..... slightly different from specs... for Solax T58 Master plus Slave 11.6kW

https://www.sma-sunny.com/en/advantages-of-ac-coupled-high-voltage-battery-over-alternative-solutions/

Solax Master and Slave is 11.6kW and is HV many threads discussions on the pros and cons LV vs HV I went with Solax HV in the end, Master and Slave 11.6kw with Solax X1 AC 3.6 inverter.... as my solar pv array is Solax X1 Boost 3.6kW G98 was installed prior by some years.

Your present system is for PV Solar only, this will also only help to charge an AC Coupled battery system. The size of Battery system will depend on various variables, usage and max loads Look at UTube - Mr EV Puzzle who explains Battery sizing for household use to minimise Minimum Import use.

Excellent John thanks for the info

40w heater nice have you got make, model and if available to purchase. Do have a warm air heater but over 100w to 1.2kw not tried it yet but now have put insulation just boxes and covers and battery is reporting 1’C increase within last mentioning so see how charging will go tonight and hold a...

Look at the inverter spec sheet or look underneath the inverter to see how many PV inputs the inverter has, might just have one set of PV inputs; one for + positive and one for - negative therefore your east/ west are on one string which means your inverter is single mppt

Thanks John that has really prompted me to just do something like your suggestion to prevent the cold air reaching the large surface area of the battery covers. Outside garage is -1’C, garage about 5’C Battery status states battery temp now 10’C Overall since 1st December Battery temp has...

You do realise it’s all about ambient room temperature within inverter or battery specs. My now cold double attached garage has reduced battery charging with Octopus Go even more with the cold, would only charge from 41% to 87% for 11.6kW. Prevalent in all electric devices, both LV and HV...

If you are going to locate batteries in loft, the existing cable 4mm2 in loft to CU downstairs, imho will not cut it, for both Inverters and Batteries, probably would need 6mm2 twin and earth upgrade... there are tables that you enter details of cable size, and distance to get a known voltage...

Solax do Parallel Box (Wondered what this is for?) for this, contact Solax UK for more info, if you are considering Solax, there are some video's on UTube. https://shop.krannich-solar.com/de-en/products/storage-solutions/accessories/14855/bms-parallel-box-ii...

My 2 Solax batteries total capacity 11.6kW will not deliver 7kW from Solax Battery specs above unless my Solax inverter AC-3.6 Is next model up which is Solax 5kW max output is 5000w

That’s same conclusion I made but dependent on Inverter capacity Output. My inverter is 3680w <16A G98. Bigger inverter required for larger output 5kW to output 5000w requiring Full G99 >16A Application with extra cost implication from DNO. I never asked that question to the DNO.

What about inverter voltage conversion from 52v compared 115v single battery to 230v two batteries system, if another 5.8kWh battery is added the minimum voltage for system is another 115v making the battery system 345v. Therefore less conversion from DC to AC and vice Versa as stated in...

Just reviewed (after above message by @arooldridge) the Solax App Battery stats Days are getting colder, Solax batteries in cold double garage (not heated) attached to Utility room temp probably 1’C or lower in garage, Battery temps now 12’C; last night charge from 52% to only 92% in the Octopus...

Great choice’s, choice’s 👌