New SRNE 30kw+ parallel build

[davewsail]

So I did it. Pulled the trigger on the batteries. I'll see how it goes. I also have a new Tesla coming within a month so will have to factor in charging that also.

Quick question for SRNE folks, is it supported by solar assistant?

 

[42OhmsPA]

Quick question for SRNE folks, is it supported by solar assistant?

Yup.

 

[1201]

So I did it. Pulled the trigger on the batteries. I'll see how it goes. I also have a new Tesla coming within a month so will have to factor in charging that also.

Quick question for SRNE folks, is it supported by solar assistant?

Congrats. Did I miss where you bought an inverter? Or is that still TBD?

 

[davewsail]

Congrats. Did I miss where you bought an inverter? Or is that still TBD?

Thank you. I'm waiting to see if the SRNE HEBP gets released while the batteries get built.

 

[1201]

Thank you. I'm waiting to see if the SRNE HEBP gets released while the batteries get built.

I'm learning from this forum you generally don't want to be one of the first ones to try a brand new inverter.

What does it have over the hesp?

 

[davewsail]

I'm learning from this forum you generally don't want to be one of the first ones to try a brand new inverter.

What does it have over the hesp?

Mainly it has 2 battery terminals, beefier connections and current capabilities. But fair point, I could buy 4 HESPs and have a spare so it is available if I need it. I spent my career in quality assurance for Intel. I don't really want to be debugging an inverter system. If I shorted something out on a processor, just a little smoke. Power systems scare me.

 

[agtcovert]

Mainly it has 2 battery terminals, beefier connections and current capabilities. But fair point, I could buy 4 HESPs and have a spare so it is available if I need it. I spent my career in quality assurance for Intel. I don't really want to be debugging an inverter system. If I shorted something out on a processor, just a little smoke. Power systems scare me.

I don't think, based on my experience with SRNE thus far, the HEBP will be particularly problematic. It's definitely got more features than an ASP, but in the event there's an issue, their support is responsive via email.

If you can, I'd hold out for the HEBP. The fact they've beefed up the MPPTs is, in and of itself, a reason to wait. They are significantly more capable on those units. They also appear to be built like tanks. Don't know how much an HESP weighs, but the HEBP clocks in around 100lbs. Must be some big heatsinks or something else in there.

 

[Zwy]

I don't think, based on my experience with SRNE thus far, the HEBP will be particularly problematic. It's definitely got more features than an ASP, but in the event there's an issue, their support is responsive via email.

If you can, I'd hold out for the HEBP. The fact they've beefed up the MPPTs is, in and of itself, a reason to wait. They are significantly more capable on those units. They also appear to be built like tanks. Don't know how much an HESP weighs, but the HEBP clocks in around 100lbs. Must be some big heatsinks or something else in there.

I agree and according to the manual the HEBP can be AC coupled thru the generator port.

Weight can depend on components such as switches and relays added at the bottom of the inverter.

 

[NC_hydro]

I don't really want to be debugging an inverter system. If I shorted something out on a processor, just a little smoke. Power systems scare me.

If this is important. I'd spend the extra on a Victron system. Was a big factor for me and my completely off grid setup for 2 houses.

 

[1201]

I don't think, based on my experience with SRNE thus far, the HEBP will be particularly problematic. It's definitely got more features than an ASP, but in the event there's an issue, their support is responsive via email.

If you can, I'd hold out for the HEBP. The fact they've beefed up the MPPTs is, in and of itself, a reason to wait. They are significantly more capable on those units. They also appear to be built like tanks. Don't know how much an HESP weighs, but the HEBP clocks in around 100lbs. Must be some big heatsinks or something else in there.

sp is 92lbs, bp 105lbs
both claim support for ac coupling
sp doesnt show grid passthrough current rating, bp says 180A
the sp can do 25A solar strings, bp is 32A
sp doesnt show max short circuit, bp shows 40A

 

[agtcovert]

sp is 92lbs, bp 105lbs
both claim support for ac coupling
sp doesnt show grid passthrough current rating, bp says 180A
the sp can do 25A solar strings, bp is 32A
sp doesnt show max short circuit, bp shows 40A

I am interested in the AC coupling function, I wish they had more in the manual/docs on it. It's got the paperwork and is on the California list of approved inverters. So, I assume it does standard frequency shifting. For me though, it's more a learning + addition to my system for non south facing panels. Especially for summer when we're running air conditioning all the time, some panels with Hoymiles microinverters is of interest.

 

[1201]

I am interested in the AC coupling function, I wish they had more in the manual/docs on it. It's got the paperwork and is on the California list of approved inverters. So, I assume it does standard frequency shifting. For me though, it's more a learning + addition to my system for non south facing panels. Especially for summer when we're running air conditioning all the time, some panels with Hoymiles microinverters is of interest.

it would be nice if it has that capability. I looked in the manual and didnt really see any mention of it.

 

[davewsail]

I don't think, based on my experience with SRNE thus far, the HEBP will be particularly problematic. It's definitely got more features than an ASP, but in the event there's an issue, their support is responsive via email.

If you can, I'd hold out for the HEBP. The fact they've beefed up the MPPTs is, in and of itself, a reason to wait. They are significantly more capable on those units. They also appear to be built like tanks. Don't know how much an HESP weighs, but the HEBP clocks in around 100lbs. Must be some big heatsinks or something else in there.

Yes, that is what I thought too. I forgot about the beefier MPPTs.

 

[davewsail]

If this is important. I'd spend the extra on a Victron system. Was a big factor for me and my completely off grid setup for 2 houses.

I've been looking at Victron. The problem is I need at least 30kw capability (well now that I'm getting a Tesla more I think) with advice from folks here that my load should be <=50% of the inverter capacity. I also like that the SRNE is IP65 because my electrical room is also my water treatment room (just in case). But since right now I'm waiting for HEBPs to become available, I'm studying my load profile more. I will have some hot days next week to see what it looks like.

This system will be grid connected (already is) so will have that backup and then I have a 26kw Generac also. Net metering is fine financially but the grid here is so unreliable. I hate the constant outages, especially when it is hot and my solar array should be producing the most.

 

[davewsail]

To locally source Victron, these would be my costs:
2x RS 450/200 @$2600/each = $5200 (would give me the ability to add 2 more strings)
3x Quattro 10kVA @$3500/each = $10500 (less total output than HEBPs)

So basically about double the price of the HEBPs (assuming they are $2k/each).

Oh, and the local distributor has 1 RS 450/200 in stock and none of the Quattros. So who knows how long the wait is.

 

[NC_hydro]

To locally source Victron, these would be my costs:
2x RS 450/200 @$2600/each = $5200 (would give me the ability to add 2 more strings)
3x Quattro 10kVA @$3500/each = $10500 (less total output than HEBPs)

So basically about double the price of the HEBPs (assuming they are $2k/each).

Oh, and the local distributor has 1 RS 450/200 in stock and none of the Quattros. So who knows how long the wait is.

For sure, especially in your area Victron will cost more. As I'm sure your Tesla cost more than a cheapo chinese EV. Personally I can't afford to be cheap, it costs more in the long run many times. Definitely simpler and cheaper to go the SRNE route and should work fine. Victron is something I wouldn't be surprised to last 20yrs, SRNE I would be pleasantly surprised if that was the case. And of course the usual argument is....well in 5-10yrs there will be nicer and cheaper options. Very likely true, but I like the idea of my power system lasting a long time. As low as the price is on the SRNE stuff you could definitely get spares to have on hand.

 

[davewsail]

Actually, I pulled the trigger on the Tesla because there is an almost 15% discount on the Model Y as they move production over to the Juniper model. For comparable specs the BYD Sealion costs $8k more. That's not even valuing the Tesla software over BYD.

 

[Zwy]

it would be nice if it has that capability. I looked in the manual and didnt really see any mention of it.

I found it under generator port settings....... HEBP has that capability.

 

[1201]

I found it under generator port settings....... HEBP has that capability.

It took me a while but I finally found it. I think.

"Micro inverter input"?

It's in the manual for both the hesp and hebp

 

[agtcovert]

It ended me for a while but I finally found it. I think.

"Micro inverter input"?

It's in the manual for both the hesp and hebp

That's it.

 

[k490]

I have two of these battery boxes they are stackable $400 plus shipping from China each with the JK inverter BMS. When you price in the BMS all the parts to build a custom box not really saving all that much maybe $100 per bank of 16.

 

[agtcovert]

I have two of these battery boxes they are stackable $400 plus shipping from China each with the JK inverter BMS. When you price in the BMS all the parts to build a custom box not really saving all that much maybe $100 per bank of 16.

Compared to another 280Ah+ battery? I agree the gap is close on rackmount 100Ah, but 280's are still worth it IMO.

 

[Zwy]

It took me a while but I finally found it. I think.

"Micro inverter input"?

It's in the manual for both the hesp and hebp

Mentioned it another thread before posting in this thread.

Post in thread 'Fronius and SRNE'

Feb 26, 2025

The Fronius feeds into the main panel thus is on the Grid Input side of the SRNE6.5. This is not AC Coupling which is done either on the load side of the inverter or via a Gen Input or Aux, multipurpose port.

True, all power for the loads panel has to go thru the SRNE inverter. This is why I suggest looking at the HEBP which according to the manual can be set for "micro inverter input" on the generator port.

• Zwy

 

[Zwy]

Compared to another 280Ah+ battery? I agree the gap is close on rackmount 100Ah, but 280's are still worth it IMO.

$630 US from Docan.

I do believe it is possible that a new use has been found for Grade B cells. Instead of selling the cells, just put them in a box with at least a 2A active balancer and sell it cheap. Give it time, it might be proven.

I'm doing the same, after struggling with 8 Grade B cells for almost 2 years using a passive balance BMS, I am putting those in a box with a 2A active balancer. I did use Grade A EVE as replacements and those balance out perfectly.

 

[agtcovert]

$630 US from Docan.

I do believe it is possible that a new use has been found for Grade B cells. Instead of selling the cells, just put them in a box with at least a 2A active balancer and sell it cheap. Give it time, it might be proven.

I'm doing the same, after struggling with 8 Grade B cells for almost 2 years using a passive balance BMS, I am putting those in a box with a 2A active balancer. I did use Grade A EVE as replacements and those balance out perfectly.

Whoa, hang on. They have pre-built 280's? That on their main site?