Split-phase inverter for battery backup use only

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If you were to purchase a split-phase inverter (or two parallel capable inverters) today to go with three 48V 5kWh rack mount batteries for emergency backup power...what model would it be? Looking for something to compliment my Honda EU7000is backup generator so I can run on battery at night and the generator during the day. This would be not be a grid tie system or for use with solar panels.

I have been researching for months and haven't found a fairly priced model in the 6kw to 15kw range that is reliable and simple to setup. My goal is to simply plug the output into my existing Nema L14-30 input box to feed a breaker/interlock setup when the generator is disconnected. I may not even mount the inverter.

So many reviews and posts here about various models having issues. The only model I have found that seems to be high quality is the Sol-Ark, but I wouldn't be able to justify the price unless I was going to have a solar setup.

 

[BentleyJ]

Since you don't need an All-in-One inverter with built in MPPT charge controllers maybe look at something like an AIMS inverter-charger.

6000 Watt Pure Sine Inverter Charger 48Vdc / 240Vac Input & 120/240Vac Split Phase Output

This 6kw 48 volt AIMS Power low frequency inverter charger is one of the most powerful split-phase inverters available on the market. Great for off-grid & emergency backup power

www.aimscorp.net

OR this

Genetry Solar – Satisfaction Guaranteed ….or your power bill back! ™

www.genetrysolar.com

 

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The Genetry Solar option looked decent but seems like it's not a very stable company and they appear to be having supply issues based on this thread:

Genetry solar 6kw inverter review

After waiting 3 1/2 months to get their inverter, it finally got here. This is a new upstart company run thus far by 2 guys who got the bright idea to custom design a better inverter for the DIY market & contracted powerjack to custom make them to their specs. They have numerous videos up on...

diysolarforum.com

Not sure about AIMS quality...some research indicates they are made by Sigineer? There is a 6k Sigineer model listed on their website, but it looks much different:

6000W Solar Inverter 48V to 120/240V Split Phase Off Grid Hybrid 80A MPPT Charger ETL Listed

6000W Solar Inverter Converts 48V to 120V 240V ac split phase pure sine wave. With UPS transfer switch & 80A MPPT charger ETL Listed.

www.sigineer.com

 

[Dickson]

The Genetry Solar option looked decent but seems like it's not a very stable company and they appear to be having supply issues based on this thread. EG4 inverter can parallel 9 but the GS 6kw can not parallel split-phase 240 .