I have TWO EG4 Chargeverters for this purpose that I lend out to clients.
The issue has become such an epidemic that I need a backup to my backup.
Sometimes I need to leave one on site, so I have a second one so I can
always help someone in a dire situation. And I charge dearly for this
service, so some clients have elected to purchase a chargeverter to have on
standby.

The output voltage is selectable. They work very well. They accept 120V or
240V input and handle ugly generator power like a boss.

This is why I strongly steer my clients away from open loop. I have had too
many EG4 banks die on Sol-Ark inverters or similar setups, requiring a dark
start.


Jason Szumlanski
Principal Solar Designer | Florida Solar Design Group
NABCEP Certified Solar Professional (PVIP)
Florida State Certified Solar Contractor CVC56956
Florida Certified Electrical Contractor EC13013208




On Fri, Oct 16, 2026 at 1:45 PM Jay <[email protected]> wrote:

> Iota and powermax will dead start.
>
> Professionally investing in a eg4 charger or similar is a good idea.
> Adjustable volt/amp setting. 120/240 input.
>
> Jay
>
>
>
> On Oct 16, 2026, at 11:29 AM, John Blittersdorf <
> [email protected]> wrote:
>
> 
>
> Ditto on Meanwell power supplies.  I only had a 2 amp version but
> overnight it brought the EFlex up to 40 v so then put an iota 13 amp
> charger on it to bring it up to match the others.  I have used the Iota DLS
> 54-13 for rebooting and with a 2000 W or equivalent small generator, and
> charged an eVault and kept a rental ski house alive on a holiday weekend
>  with a Honda 2000 when their Kohler died. The renter was game for
> refueling the Honda when needed
>
> John Blittersdorf
>
> On Fri, Oct 16, 2026 at 12:28 PM Nick Lucchese <[email protected]>
> wrote:
>
>> Chris,
>>
>> I provide a Meanwell HLG-150H-54A for all of my systems that get a new
>> 48v LiFePO4 battery. I sometimes hardwire it to the bus with a breaker
>> clearly labeled and sometimes just provide it with some alligator clips.
>> They've provided the expected result every time. They're very affordable
>> and can be sourced affordably from Zonna as well as others. Seems like
>> Fortress would have some options to recommend though for sure. Odd.
>>
>> Enjoy your weekend, Nick
>>
>> On Fri, Oct 16, 2026 at 8:51 AM Chris Schaefer <[email protected]>
>> wrote:
>>
>>> G'day All,
>>>
>>> Received a distressed call from another installers client on a twin set
>>> Fortress eFlex 5.4 kwh batterys with an OB Flexware 500 system. The battery
>>> voltage is 35. Thus I'll need to charge each one individually to bring them
>>> into the 49v range. So many options when it comes to chargers but I'd like
>>> to know what y'all are using with positive results. Fortress tech was
>>> unable to provide me with any options which I found odd.
>>>
>>> Appreciate the help,
>>> Christopher-
>>>
>>> Chris Schaefer’s
>>>
>>>
>>> *Tel 585-229-2083 <(585)%20229-2083> or Cell 585-748-1870
>>> <(585)%20748-1870> *
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>>> <http://www.solarandwindfx.com> ~ E-mail: [email protected]
>>> <[email protected]>*
>>>
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