Not compatible

COTEK SC-1200-112 + EG4 WallMount All Weather 280Ah

Voltage doesn't match: the 51.2 V battery won't work with this 12 V inverter.

Checked automatically against spec sheets. Not yet confirmed in a real install. Last checked 2026-10-14. We don't track firmware versions.

Size the battery cable and fuse for this pair in the build tool, from your run length.

Published limits, side by side

Spec	COTEK SC-1200-112	EG4 WallMount All Weather 280Ah
Voltage	12 V accepts 10.5–16.5 V	51.2 V
Current	Max battery current 132 A	Max charge 140 A Max output 140 A Peak output 200 A
Communication	None listed	EG4 hybrid closed loopEG4 EHV closed loopGrowatt SPF/SPE closed loop
Cable connection	Stud size Not published	Terminal Not published

Values come from each maker's documents. "Not published" means the maker doesn't state it.

Confirm with the makers before you buy

Whether one battery can take the inverter's full current. The inverter's max battery current is 132 A. This battery is rated for 140 A charging and 140 A output. Ask how many batteries to run in parallel.
Which firmware versions support this pairing. We don't track firmware.
That your cable lugs fit the inverter's battery studs (Not published) and the battery's terminals (Not published).
How to install both safely, from each maker's manual and your local code.

This result checks two things: the battery's voltage suits the inverter, and the inverter maker lists this battery for closed-loop communication (the battery tells the inverter how to charge it). It doesn't check current limits, charge settings, firmware, cable sizes, or safe installation. Confirm those with both makers before you buy.

Sources

This result comes from the documents below. We haven't yet found an outside source that confirms it, such as a forum report or a video of a real install.

Where to buy

COTEK SC-1200-112

No store links yet. The maker's site is below.
COTEK (maker)

EG4 WallMount All Weather 280Ah

Other batteries for the COTEK SC-1200-112

Battery	Result
Rich Solar ALPHA 6 MINI	Partly checked : COTEK SC-1200-112 with Rich Solar ALPHA 6 MINI
Universal Battery D2790	Partly checked : COTEK SC-1200-112 with Universal Battery D2790
Battle Born Batteries BB10012	Partly checked : COTEK SC-1200-112 with Battle Born Batteries BB10012
Battle Born Batteries BBGC3	Partly checked : COTEK SC-1200-112 with Battle Born Batteries BBGC3
Sun Xtender PVX-690T	Partly checked : COTEK SC-1200-112 with Sun Xtender PVX-690T
Rich Solar RS-B121S	Partly checked : COTEK SC-1200-112 with Rich Solar RS-B121S
Trojan 24TMX	Partly checked : COTEK SC-1200-112 with Trojan 24TMX
Universal Battery D5747	Partly checked : COTEK SC-1200-112 with Universal Battery D5747
Universal Battery D5777	Partly checked : COTEK SC-1200-112 with Universal Battery D5777
Universal Battery D5744	Partly checked : COTEK SC-1200-112 with Universal Battery D5744

Other inverters for the EG4 WallMount All Weather 280Ah

Inverter	Result
EG4 FlexBOSS18	Specs match : EG4 FlexBOSS18 with EG4 WallMount All Weather 280Ah
Growatt SPF 6000T DVM-MPV	Specs match : Growatt SPF 6000T DVM-MPV with EG4 WallMount All Weather 280Ah
EG4 FlexBOSS21	Specs match : EG4 FlexBOSS21 with EG4 WallMount All Weather 280Ah
EG4 12000XP	Specs match : EG4 12000XP with EG4 WallMount All Weather 280Ah
EG4 6000XP	Specs match : EG4 6000XP with EG4 WallMount All Weather 280Ah
EG4 12kPV	Specs match : EG4 12kPV with EG4 WallMount All Weather 280Ah
Growatt SPE 12000 US	Specs match : Growatt SPE 12000 US with EG4 WallMount All Weather 280Ah
Growatt SPF 12000T DVM-MPV	Specs match : Growatt SPF 12000T DVM-MPV with EG4 WallMount All Weather 280Ah
EG4 3000EHV-48	Specs match : EG4 3000EHV-48 with EG4 WallMount All Weather 280Ah
EG4 18KPV-12LV	Specs match : EG4 18KPV-12LV with EG4 WallMount All Weather 280Ah

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