SKU: EG4CV48V100AV3
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The EG4 Chargeverter-GC is a 48V battery charger that turns generator or grid power into up to 100A of charging, delivered straight to your LiFePO4 bank instead of through your inverter. Your house stays on clean inverter power while even a budget generator refills the batteries, and stock of the GC is limited.
Up to 100A of adjustable charge current and 5,120W of output on 240V input
Runs on 240V, 208V (up to 50A) or 120V (up to 45A), anywhere from 90 to 264Vac at 50 or 60Hz
Charge voltage adjusts from 43 to 57Vdc and ships set to 54Vdc for 48V lithium banks
Up to 94% efficient on 240V (92% on 120V) with about 10W of idle draw
Dry contacts start and stop your generator by battery voltage or state of charge, and an RS485 link reads state of charge from batteries such as the EG4 LL Series
NEMA L14-30P twist-lock plug for a 240V 30A circuit or generator outlet, plus a front breaker that shuts off charger output
Includes 6 ft DC leads with 5/16" ring terminals, mounting brackets, RS485 battery and USB update cables, and a dry contact cable; EG4 Chargeverter Adapter Cables (sold separately) connect it directly to EG4 WallMount batteries
5 × 13.2 × 4.9 in (127 × 335 × 124 mm) H×W×D, 13 lb (5.9 kg), IP21 for indoor mounting, with a 3-year EG4 warranty for indoor use
Current Connected is YOUR EG4 Electronics product specialist
The Chargeverter-GC turns a generator into a 48V battery charger with up to 5,120W behind it. Plug the generator into the charger, land the charger's leads on your battery bank, and your inverter keeps running the house from the batteries while the generator refills them. EG4 built the GC to handle the rough power that budget generators put out, so the generator never has to feed your inverter directly.
One off-grid customer put the GC between his generator and his batteries so the house stays on inverter power, which let him plan around a far less expensive 240V generator instead of replacing his aging inverter generator. At full output he measured about 90A going into the batteries with the generator supplying roughly 5,600W.
The GC charges from the grid just as well, which makes it a fast way to top up a bank before a storm or after a run of cloudy days. At full output it refills a 5kWh server rack battery in about an hour. Stock of the GC is limited, which makes now the time to pick up a second unit or a spare for a system built around one.
Both chargers put out 100A on 240V. If you already run a GC, a second one gives you the same menu, the same brackets and the same RS485 and dry contact cables, so you set it up exactly like the first. The Plus adds an IP54 enclosure and a cold rating down to -40°F, which suits an unheated garage.
The GC's L14-30P plug goes straight into a generator's 240V twist-lock outlet. Full 100A output draws up to 26A at 240V, about 6.2kW, so a generator in the Cummins Onan P9500DF class runs it flat out. With a smaller generator, turn the charge current down in 1A steps until the generator carries the load comfortably.
Wire the dry contacts to your generator's auto start circuit and the GC starts it when the batteries reach your start point and shuts it off at your stop point, by voltage or by state of charge. Keep voltage start and stop settings at least 5V apart, and expect about two minutes of cooldown once the stop point is reached.
No 240V source? The GC also runs on 120V or 208V at reduced current. Swap in the EG4 120V Quick-Connect Power Cord and it plugs into a standard house outlet, with charge current set to 25.2A or less on a 15A outlet (31.5A on a 20A outlet).
A dedicated 120V 30A circuit raises the limit to 45A, and a 208V 30A circuit allows up to 50A.
EG4 calls for a vertical mount on concrete or another non-combustible surface, with the vents clear and the room between 32°F and 131°F, and rates the GC for use up to 4,921 ft (1,500 m). Plan for the heat: at full output the GC sheds a few hundred watts, and one customer spaced his unit off the wall on short standoffs to help it breathe. When it's wired to a building circuit, feed it from a dedicated 30A breaker.
The 6 ft DC leads end in 5/16" ring terminals for your busbar or battery terminals, and EG4 requires overcurrent protection on the DC side. A genuine Littelfuse MEGA fuse on the positive lead protects this branch circuit well within its 70V rating, sized to the leads and the 100A output.
Not sure which fuse fits your bank? Our team is happy to help with sizing.
It connects to the battery bank, not the inverter, so it charges alongside any 48V inverter or inverter-charger that shares that bank. Keep its charge voltage within your battery maker's limits.
EG4 designed the GC for 48V lithium batteries. For any other chemistry, EG4 says to confirm the charging specs with the battery manufacturer first, and work within the GC's 43 to 57V adjustable range.
The GC reads state of charge over RS485 from batteries with a supported BMS, and EG4's example is its LL Series. A 48V lithium bank without that link still charges normally: the GC reads battery voltage instead, and auto start runs on voltage thresholds.
No. When it's grid-connected, the GC doesn't start or stop a generator. Auto start works when the generator is the AC source.
The EG4 manual, spec sheet and wiring diagram are in the Downloads section on this page. The diagram shows the GC charging a battery bank from an auxiliary generator alongside an EG4 18kPV system.
I was so tired of dialing in my generator RPM every time my batteries would get low during a storm. Sometimes it would take twenty minutes of adjusting before my inverter would switch over to the generator input. No longer. Now, the generator starts and the Chargeverter charges the batteries and the inverter continues to run the house un-interrupted. Great solution.
I love this charger! I'm off-grid using Outback inverters and although they have a transfer switch and a charger built in and work great, my Honda eu7000 inverter generator is now 11 years old and has around 5500 hours on it. Meaning, it will die someday and I am not going to spend $6k for a new one. All the non-inverter generators cause most of my electronics to complain in the house. Exactly why I HAD to but the inverter generator 11 years ago. Now I know I can buy a similar "off-brand" inverter for around $2k BUT, using this charger I can stop using my inverter's charger and transfer switch keeping everything in the house running on the inverters (good power) and still get 5000w into my batteries. Meaning I can buy a $700 generator instead. Note that you MUST have a 240v generator that can do a continuous output of 5500w (not surge rating) in order to get the full 5000w/100a out of this charger. It seems to have a good power factor in that when maxing out the charger at around 90 amps at ~56v (~5000w) my generator is pulling 5600w. The "ramp-up" feature of the charger is awesome in that it doesn't cause a huge "hit/surge" on the generator. Although it is so. It takes about 5 mins for it to get to full output. Make note that this sucker puts out some heat! So you'll have to plan for a way to dispose of it otherwise you'll have a sauna in whatever room you have it in. That's not a fault of the unit, 5000w is going thru it and THAT is a lot of heat! Most hair driers put out 1500w max. So imagine 3 of them blowing together! I recommend using some standoffs (I used small pieces of copper/brass pipe with long screws) to keep it away from the wall and help it cool better (see pix below). I have used it for a total of about 12 hours so far (over 3 different occasions) and it has been flawless.
I can't try this charger because the cables that came with it don't fit my EG4 wall mounted battery :-(
Sorry to hear this product didn't meet the mark out of the box! EG4 does make adapter cables to replace the ring terminal cables in order to fit onto a 280Ah EG4 WallMount battery, and you can find it here: https://www.currentconnected.com/product/eg4-electronics-chargeverter-adapter-cables-for-chargeverter-gc-to-280ah-wallmount-battery/ We have also updated the Chargeverter-GC listing to be more clear on the connections. Thank you for your feedback!
