- Aug 4, 2005
I think I might have screwed up (my inverter )
OK so batteries finally arrived this am, and after opening the box noticed the terminals were bloody thick, ancient, unwieldy SAE post types...after missioning around finally found a local automotive shop that sold me 2 neg and 2 pos heavy duty battery terminals clamps ( @ 4x R30! )
Got all the cables ends sorted ( which was a PIA as the 16mm^2 cable I had just purchased a few days back( about R90 for 2x 1m - overkill but they didn't sell any thinner cable!) didn't fit snugly into terminal clamps after tightening so had to do a bit of a MacGyver to get it to sit nice and tight.
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Have not attached DC circuit breaker to + cable at this point as I checked online and it's not needed as Inverter has surge protection built in.
So far so good.
Connected up the 2x85Ah batteries in series. Attached the cables to inverter. All ready to go, right? Right.
View attachment 793723
Switched on Inverter at wall and immediately noticed the lcd flickering madly. Tried flicking the online/offline button....no difference! Immediately switched power off at wall socket.
Checked all battery connections and double checked + and - attachments were connected where they should be...and tried powering on one final time.
Same result....lcd flickers wildly.
Taken a few pics, maybe someone can point out what I'm doing wrong here. Bit deflated atm after all the reading and prep I thought it was a relatively simple exercise.
Thought I'd gone through this carefully and prepared everything but seems not.
Inverter was working for last few days on the 2 x7Ah batteries from my UPS.
The best way to use those battery clamps is to terminate the cables on proper cable lugs of the correct size for the cable AND for the small bolts on the cable clamp and clamp the cable luge between the two halves of the cable clamp with one of the bolts going through the cable lug. Clamping the cable between the clamps as you have done is not going to give you a reliable low resistance connection.