Not quite a generator, but my 803 is part of it soon...

[cbisson]

@cbisson and @DieselAddict does the EG4 take an input from the main inverter as to the SoC of the system?

I prefer to have charging distinct from inverter to AC supplies for a variety of reasons, but under simultaneous charging and discharging, the SoC can be hard to determine sometimes. How is it handled with these inverter/chargers?

All the best,

2Pbfeet

The latest version of the Chargeverter can communicate with the batteries.

I don't use battery comm in my system (open loop). The current from the chargeverter passes through the system's main shunt so it keeps track of the battery bank SOC.

 

[vrzff]

Thanks everyone for all the input on this thread!

Passed my electrical inspection this morning, now just waiting for Eversource to come give me my net meter.

Just about to hit 100kWh of production in the few days it's been hooked up and running. Can't wait to knock a few more trees down keep that number going up.

Ship pulled into port this morning, hoping the batteries make their way onto the truck in the next few days.

 

[spotrep]

You may want to use one of these instead of using the charger in your Growatt.

EG4 Chargeverter - GC | 48V 100A Battery Charger 5120W Output | 240/120V Input

EG4 Chargeverter GC: 48V, 100A battery charger with 5120W output. Versatile with 240/120V input, perfect for high-performance energy needs.

signaturesolar.com

The Growatt has to carry the variable load of the house while at the same time charging the batteries. You won't be able too and won't want to use the full charging capacity of the generator as you'll have to leave inverter overhead for the house load which is variable. If you push too hard on the charging you may overload the Growatt.

I use 1 of these to charge my battery bank with an 802a. I set the chargeverter to 88 amps into the batteries which holds the generator at a constant 80% load.

I designed my system so that all of the components are working well under rated capacity. Solar charge controllers, inverters, batteries, etc. Nothing gets hot with cooling fans screaming etc.

YMMV. Just something to think about.

I was gonna jump in and mention this product. For those unaware I’d recommend will prowse on YouTube:

he also has a forum for diy solar that I think would be useful. Maybe yall can be evangelists for Meps.. on second thought let’s keep it on the down low to keep demand down!!

I’ve seen people use multiple chargeverters, which might be more appropriate for an 803, which really opens up for many people being able to justify the 10kw without fear of wet stacking, for that matter perhaps the 804 too, if it works in 3ph configuration (does anyone know if that’s the case?). This is the perfect application for a diesel generator, and my goal of my backup power system one day. Oh and I guess if I’m gonna have batteries and inverters I may as well have panels too.

 

[Coug]

I was gonna jump in and mention this product. For those unaware I’d recommend will prowse on YouTube:

he also has a forum for diy solar that I think would be useful. Maybe yall can be evangelists for Meps.. on second thought let’s keep it on the down low to keep demand down!!

I’ve seen people use multiple chargeverters, which might be more appropriate for an 803, which really opens up for many people being able to justify the 10kw without fear of wet stacking, for that matter perhaps the 804 too, if it works in 3ph configuration (does anyone know if that’s the case?). This is the perfect application for a diesel generator, and my goal of my backup power system one day. Oh and I guess if I’m gonna have batteries and inverters I may as well have panels too.

if you are putting 3 of them on a 3 phase generator then you should be able to put one on each leg to balance it out, provided they don't mind voltage being a little under 240

edit: looks like they can take a very wide range of voltage, so I don't see it being an issue.