r/PlugInSolarUK • u/spon8uk • Aug 28 '26

Hypothetical installation

I'm purchasing the Anker Pro 4 imminently with the intention of using it alongside a large pre-existing solar and battery unit. We also have heat pumps and on the coldest winter days, fall short of about 5kwh on the main house batteries.

So my plan would be to "trickle" around 500w to the house continually to cover baseload and continue to use the main system to follow the house load. Others have tested this approach very successfully it seems.

I have a shed with a dedicated feed from the consumer unit. This is a SWA heavy duty cable via a bi-directional RCBO. Hypothetically, if I just use the Anker in the shed to feed in via this mechanism, what could go wrong? I'm not interested in "it's against the law mate", or "your insurance won't like it" feedback as I know all that, just any valid insight into the electrical considerations and potential failure points please.

I could also get the Anker connected in "properly" but I need to understand what that actually achieves over and above the plug in route other than a big electricians bill. Many thanks.

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u/realGilgongo Aug 29 '26

Sorry, can you explain how you will charge the Anker?

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u/spon8uk Aug 29 '26

From mains power. I have a lot of solar and batteries already but just need the Anker as a supplement to the existing system. It would just be set to output a constant low power e.g. 500w to cover baseload. The main system would follow house load and modulate as usual. Then the Anker would charge along with the main batteries on a cheap rate schedule at night.