You say “I built”, but the inverter/charger/battery is an off the shelf unit - I have one from the same OEM here, 400Wh model, same outputs (but 230v ac), and I got a folding 150W panel for go with it. Works great as a stopgap for lighting, network stack, but 500Wh doesn’t go far with, say, a laptop, particularly after all the conversions.
Anyway. I guess your primary value add is in bundling it all together and telling people where to stick stuff via zoom, but “I built” is a bit misleading. I designed and installed a 5kva 4800 solar watt 42kWh system here, but I wouldn’t say I built it - I just stuck the bits I ordered together.